diff --git a/.changelog/unreleased/bug-fixes/ibc-relayer/3770-non-utf8-packet-data.md b/.changelog/unreleased/bug-fixes/ibc-relayer/3770-non-utf8-packet-data.md
new file mode 100644
index 0000000000..ab7a573fcb
--- /dev/null
+++ b/.changelog/unreleased/bug-fixes/ibc-relayer/3770-non-utf8-packet-data.md
@@ -0,0 +1,6 @@
+- Allow relaying ICS-04 packets with non-UTF-8 payloads ([\#3770](https://github.com/informalsystems/hermes/issues/3770))
+  Hermes does not assume anymore that an ICS-04 packet data is valid UTF-8,
+  by using the `packet_data_hex` attribute when assembling a packet from events, instead of the deprecated `packet_data` attribute.
+  Relying on the `packet_data` attribute enforces a UTF-8 encoded payload (eg. JSON), disallowing eg. Protobuf-encoded payloads.
+  The `packet_data` atttribute [has been deprecated][0] in favor of `packet_data_hex` since IBC-Go v1.0.0.
+  [0]: https://github.com/cosmos/ibc-go/blob/fadf8f2b0ab184798d021d220d877e00c7634e26/CHANGELOG.md?plain=1#L1417
diff --git a/.changelog/unreleased/bug-fixes/ibc-relayer/3831-better-compat-check.md b/.changelog/unreleased/bug-fixes/ibc-relayer/3831-better-compat-check.md
new file mode 100644
index 0000000000..b533e98fe6
--- /dev/null
+++ b/.changelog/unreleased/bug-fixes/ibc-relayer/3831-better-compat-check.md
@@ -0,0 +1,2 @@
+- Improve reliability of compatibility check and fix parsing of expected modules
+  versions ([\#3831](https://github.com/informalsystems/hermes/issues/3831))
\ No newline at end of file
diff --git a/.changelog/unreleased/features/ibc-relayer/3811-relayer-memo-overwrite.md b/.changelog/unreleased/features/ibc-relayer/3811-relayer-memo-overwrite.md
new file mode 100644
index 0000000000..fcd1a840d3
--- /dev/null
+++ b/.changelog/unreleased/features/ibc-relayer/3811-relayer-memo-overwrite.md
@@ -0,0 +1,3 @@
+- Add a per-chain configuration `memo_overwrite` allowing users
+  to overwite the relayer memo used for each transaction
+  ([\#3811](https://github.com/informalsystems/hermes/issues/3811))
\ No newline at end of file
diff --git a/.changelog/unreleased/features/ibc-telemetry/3845-add-simulate-errors-metric.md b/.changelog/unreleased/features/ibc-telemetry/3845-add-simulate-errors-metric.md
new file mode 100644
index 0000000000..7e83a36b32
--- /dev/null
+++ b/.changelog/unreleased/features/ibc-telemetry/3845-add-simulate-errors-metric.md
@@ -0,0 +1,11 @@
+- Added a new Prometheus metric `simulate_errors` for tracking when a transaction simulation fails, with the following labels: 
+  * `recoverable` (can the execution continue if this happened?) 
+  * `account` (account from which the tx was sent) 
+  * `error_description` (description of the error) 
+  ([\#3845](https://github.com/informalsystems/hermes/issues/3845))
+
+  ```
+  # HELP simulate_errors_total Number of errors observed by Hermes when simulating a Tx
+  # TYPE simulate_errors_total counter
+  simulate_errors_total{account="osmo17ndx5qfku28ymxgmq6zq4a6d02dvpfjjul0hyh",error_description="Unknown error",recoverable="false",service_name="unknown_service",otel_scope_name="hermes",otel_scope_version=""} 4
+  ```
diff --git a/.changelog/unreleased/improvements/ibc-relayer-cli/3792-legacy-simulation.md b/.changelog/unreleased/improvements/ibc-relayer-cli/3792-legacy-simulation.md
new file mode 100644
index 0000000000..f09d5088c1
--- /dev/null
+++ b/.changelog/unreleased/improvements/ibc-relayer-cli/3792-legacy-simulation.md
@@ -0,0 +1,2 @@
+- Recover from gas simulation failures on legacy chains.
+  ([\#3792](https://github.com/informalsystems/hermes/issues/3792))
diff --git a/.changelog/unreleased/improvements/ibc-relayer/3540-ordered-channels-resilience.md b/.changelog/unreleased/improvements/ibc-relayer/3540-ordered-channels-resilience.md
new file mode 100644
index 0000000000..88899c96f5
--- /dev/null
+++ b/.changelog/unreleased/improvements/ibc-relayer/3540-ordered-channels-resilience.md
@@ -0,0 +1,6 @@
+- Improve resilience when relaying on ordered channels. 
+  When relaying packets on an ordered channel, Hermes will now attempt
+  to detect whether the next message to send has the sequence number
+  expected on that channel. If there is a mismatch, then Hermes will trigger a packet
+  clear on the channel to unblock it before resuming operations on that channel.
+  ([\#3540](https://github.com/informalsystems/hermes/issues/3540))
diff --git a/.github/workflows/cargo-doc.yaml b/.github/workflows/cargo-doc.yaml
index ebc03618b6..1cb9f346a6 100644
--- a/.github/workflows/cargo-doc.yaml
+++ b/.github/workflows/cargo-doc.yaml
@@ -28,7 +28,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions-rs/toolchain@v1
         with:
-          toolchain: nightly-2023-07-13
+          toolchain: nightly-2024-03-03
           override: true
 
       - name: Build API documentation
diff --git a/.github/workflows/docker.yml b/.github/workflows/docker.yml
index 5b3ac9891e..14e6875d8a 100644
--- a/.github/workflows/docker.yml
+++ b/.github/workflows/docker.yml
@@ -13,15 +13,9 @@ env:
 
 jobs:
   docker-build:
-    runs-on: ubuntu-latest
+    runs-on: macos-14
     strategy:
       fail-fast: false
-      matrix:
-        platform:
-          - id: linux/amd64
-            name: amd64
-          - id: linux/arm64
-            name: arm64
     steps:
       - name: Checkout
         uses: actions/checkout@v4
@@ -31,13 +25,15 @@ jobs:
         uses: docker/metadata-action@v5
         with:
           images: ${{ env.REGISTRY_IMAGE }}
-
-      - name: Set up QEMU
-        uses: docker/setup-qemu-action@v3
+          tags: |
+            type=ref,event=tag
+            type=ref,event=workflow_dispatch
 
       - name: Set up Docker Buildx
         id: buildx
         uses: docker/setup-buildx-action@v3
+        with:
+          platforms: linux/amd64,linux/arm64
 
       - name: Login to Docker Hub
         uses: docker/login-action@v3
@@ -45,78 +41,27 @@ jobs:
           username: ${{ secrets.DOCKER_HUB_USERNAME }}
           password: ${{ secrets.DOCKER_HUB_ACCESS_TOKEN }}
 
-      - name: Build and push by digest
+      - name: Login to GitHub Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Build and push
         id: build
         uses: docker/build-push-action@v5
         with:
           context: .
           file: ./ci/release/hermes.Dockerfile
-          platforms: ${{ matrix.platform.id }}
-          labels: ${{ steps.meta.outputs.labels }}
-          outputs: type=image,name=${{ env.REGISTRY_IMAGE }},push-by-digest=true,name-canonical=true,push=true
+          platforms: linux/amd64,linux/arm64
+          push: true
           cache-from: type=gha
           cache-to: type=gha,mode=max
-
-      - name: Export digest
-        run: |
-          mkdir -p /tmp/digests
-          digest="${{ steps.build.outputs.digest }}"
-          touch "/tmp/digests/${digest#sha256:}"
-
-      - name: Upload digest
-        uses: actions/upload-artifact@v4
-        with:
-          name: digests-${{ matrix.platform.name }}
-          path: /tmp/digests/*
-          if-no-files-found: error
-          retention-days: 1
-
-  docker-merge:
-    runs-on: ubuntu-latest
-    needs:
-      - docker-build
-    steps:
-      - name: Download digests
-        uses: actions/download-artifact@v4
-        with:
-          pattern: digests-*
-          merge-multiple: true
-          path: /tmp/digests
-
-      - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3
-
-      - name: Docker meta
-        id: meta
-        uses: docker/metadata-action@v5
-        with:
-          images: ${{ env.REGISTRY_IMAGE }}
-
-      - name: Login to Docker Hub
-        uses: docker/login-action@v3
-        with:
-          username: ${{ secrets.DOCKER_HUB_USERNAME }}
-          password: ${{ secrets.DOCKER_HUB_ACCESS_TOKEN }}
-
-      - name: Create manifest list and push
-        working-directory: /tmp/digests
-        run: |
-          docker buildx imagetools create --tag ${{ env.REGISTRY_IMAGE }}:${{ steps.meta.outputs.version }} \
-            $(printf '${{ env.REGISTRY_IMAGE }}@sha256:%s ' *)
+          tags: |
+            ${{ env.REGISTRY_IMAGE }}:${{ steps.meta.outputs.version }}
+            ghcr.io/${{ env.REGISTRY_IMAGE }}:${{ steps.meta.outputs.version }}
 
       - name: Inspect image
         run: |
           docker buildx imagetools inspect ${{ env.REGISTRY_IMAGE }}:${{ steps.meta.outputs.version }}
-
-      - name: Login to GitHub Container Registry
-        uses: docker/login-action@v3
-        with:
-          registry: ghcr.io
-          username: ${{ github.repository_owner }}
-          password: ${{ secrets.GITHUB_TOKEN }}
-
-      - name: Push image to GHCR
-        run: |
-          docker buildx imagetools create \
-            --tag ghcr.io/${{ env.REGISTRY_IMAGE }}:${{ steps.meta.outputs.version }} \
-            ${{ env.REGISTRY_IMAGE }}:${{ steps.meta.outputs.version }}
diff --git a/.github/workflows/misbehaviour.yml b/.github/workflows/misbehaviour.yml
index 724e55b93f..c3adff0afc 100644
--- a/.github/workflows/misbehaviour.yml
+++ b/.github/workflows/misbehaviour.yml
@@ -55,7 +55,7 @@ jobs:
             substituters = https://cache.nixos.org https://cosmosnix-store.s3.us-east-2.amazonaws.com
             trusted-public-keys = cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY= cosmosnix.store-1:O28HneR1MPtgY3WYruWFuXCimRPwY7em5s0iynkQxdk=
       - name: Install sconfig
-        uses: jaxxstorm/action-install-gh-release@v1.10.0
+        uses: jaxxstorm/action-install-gh-release@v1.11.0
         with:
           repo: freshautomations/sconfig
           platform: linux
@@ -64,7 +64,7 @@ jobs:
           rename-to: sconfig
           chmod: 0755
       - name: Install stoml
-        uses: jaxxstorm/action-install-gh-release@v1.10.0
+        uses: jaxxstorm/action-install-gh-release@v1.11.0
         with:
           repo: freshautomations/stoml
           platform: linux
@@ -106,7 +106,7 @@ jobs:
             substituters = https://cache.nixos.org https://cosmosnix-store.s3.us-east-2.amazonaws.com
             trusted-public-keys = cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY= cosmosnix.store-1:O28HneR1MPtgY3WYruWFuXCimRPwY7em5s0iynkQxdk=
       - name: Install sconfig
-        uses: jaxxstorm/action-install-gh-release@v1.10.0
+        uses: jaxxstorm/action-install-gh-release@v1.11.0
         with:
           repo: freshautomations/sconfig
           platform: linux
@@ -115,7 +115,7 @@ jobs:
           rename-to: sconfig
           chmod: 0755
       - name: Install stoml
-        uses: jaxxstorm/action-install-gh-release@v1.10.0
+        uses: jaxxstorm/action-install-gh-release@v1.11.0
         with:
           repo: freshautomations/stoml
           platform: linux
@@ -157,7 +157,7 @@ jobs:
             substituters = https://cache.nixos.org https://cosmosnix-store.s3.us-east-2.amazonaws.com
             trusted-public-keys = cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY= cosmosnix.store-1:O28HneR1MPtgY3WYruWFuXCimRPwY7em5s0iynkQxdk=
       - name: Install sconfig
-        uses: jaxxstorm/action-install-gh-release@v1.10.0
+        uses: jaxxstorm/action-install-gh-release@v1.11.0
         with:
           repo: freshautomations/sconfig
           platform: linux
@@ -166,7 +166,7 @@ jobs:
           rename-to: sconfig
           chmod: 0755
       - name: Install stoml
-        uses: jaxxstorm/action-install-gh-release@v1.10.0
+        uses: jaxxstorm/action-install-gh-release@v1.11.0
         with:
           repo: freshautomations/stoml
           platform: linux
@@ -209,7 +209,7 @@ jobs:
             substituters = https://cache.nixos.org https://cosmosnix-store.s3.us-east-2.amazonaws.com
             trusted-public-keys = cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY= cosmosnix.store-1:O28HneR1MPtgY3WYruWFuXCimRPwY7em5s0iynkQxdk=
       - name: Install sconfig
-        uses: jaxxstorm/action-install-gh-release@v1.10.0
+        uses: jaxxstorm/action-install-gh-release@v1.11.0
         with:
           repo: freshautomations/sconfig
           platform: linux
@@ -218,7 +218,7 @@ jobs:
           rename-to: sconfig
           chmod: 0755
       - name: Install stoml
-        uses: jaxxstorm/action-install-gh-release@v1.10.0
+        uses: jaxxstorm/action-install-gh-release@v1.11.0
         with:
           repo: freshautomations/stoml
           platform: linux
diff --git a/Cargo.lock b/Cargo.lock
index 54100bfeb2..d2ce93d898 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -81,9 +81,9 @@ dependencies = [
 
 [[package]]
 name = "anstyle"
-version = "1.0.6"
+version = "1.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8901269c6307e8d93993578286ac0edf7f195079ffff5ebdeea6a59ffb7e36bc"
+checksum = "7079075b41f533b8c61d2a4d073c4676e1f8b249ff94a393b0595db304e0dd87"
 
 [[package]]
 name = "anstyle-parse"
@@ -115,9 +115,9 @@ dependencies = [
 
 [[package]]
 name = "anyhow"
-version = "1.0.79"
+version = "1.0.80"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "080e9890a082662b09c1ad45f567faeeb47f22b5fb23895fbe1e651e718e25ca"
+checksum = "5ad32ce52e4161730f7098c077cd2ed6229b5804ccf99e5366be1ab72a98b4e1"
 
 [[package]]
 name = "arc-swap"
@@ -894,9 +894,9 @@ dependencies = [
 
 [[package]]
 name = "ed25519-dalek"
-version = "2.1.1"
+version = "2.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4a3daa8e81a3963a60642bcc1f90a670680bd4a77535faa384e9d1c79d620871"
+checksum = "1f628eaec48bfd21b865dc2950cfa014450c01d2fa2b69a86c2fd5844ec523c0"
 dependencies = [
  "curve25519-dalek",
  "ed25519",
@@ -1044,9 +1044,9 @@ dependencies = [
 
 [[package]]
 name = "fiat-crypto"
-version = "0.2.6"
+version = "0.2.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1676f435fc1dadde4d03e43f5d62b259e1ce5f40bd4ffb21db2b42ebe59c1382"
+checksum = "27573eac26f4dd11e2b1916c3fe1baa56407c83c71a773a8ba17ec0bca03b6b7"
 
 [[package]]
 name = "fixed-hash"
@@ -1260,7 +1260,7 @@ dependencies = [
  "futures-sink",
  "futures-util",
  "http",
- "indexmap 2.2.2",
+ "indexmap 2.2.1",
  "slab",
  "tokio",
  "tokio-util",
@@ -1311,9 +1311,9 @@ dependencies = [
 
 [[package]]
 name = "hermit-abi"
-version = "0.3.5"
+version = "0.3.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d0c62115964e08cb8039170eb33c1d0e2388a256930279edca206fff675f82c3"
+checksum = "5d3d0e0f38255e7fa3cf31335b3a56f05febd18025f4db5ef7a0cfb4f8da651f"
 
 [[package]]
 name = "hex"
@@ -1477,14 +1477,15 @@ dependencies = [
  "tendermint",
  "tendermint-rpc",
  "time",
- "toml 0.8.10",
+ "toml 0.8.8",
  "tonic",
 ]
 
 [[package]]
 name = "ibc-proto"
-version = "0.41.0"
-source = "git+https://github.com/cosmos/ibc-proto-rs.git?branch=romac/channel-upgrade-only#0d28c0068634ef3c863e7a56a34c2c2fce222164"
+version = "0.42.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "80701a1b0e0ade6f28071d7d2d6412e01869f22bb7039f52722161ecdeb083e0"
 dependencies = [
  "base64",
  "bytes",
@@ -1560,7 +1561,7 @@ dependencies = [
  "tiny-keccak",
  "tokio",
  "tokio-stream",
- "toml 0.8.10",
+ "toml 0.8.8",
  "tonic",
  "tracing",
  "tracing-subscriber",
@@ -1619,7 +1620,7 @@ dependencies = [
  "reqwest",
  "serde",
  "tokio",
- "toml 0.8.10",
+ "toml 0.8.8",
  "tracing",
 ]
 
@@ -1700,7 +1701,7 @@ dependencies = [
  "subtle-encoding",
  "tendermint-rpc",
  "tokio",
- "toml 0.8.10",
+ "toml 0.8.8",
  "tonic",
  "tracing",
  "tracing-subscriber",
@@ -1768,9 +1769,9 @@ dependencies = [
 
 [[package]]
 name = "indexmap"
-version = "2.2.2"
+version = "2.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "824b2ae422412366ba479e8111fd301f7b5faece8149317bb81925979a53f520"
+checksum = "433de089bd45971eecf4668ee0ee8f4cec17db4f8bd8f7bc3197a6ce37aa7d9b"
 dependencies = [
  "equivalent",
  "hashbrown 0.14.3",
@@ -1818,9 +1819,9 @@ checksum = "b1a46d1a171d865aa5f83f92695765caa047a9b4cbae2cbf37dbd613a793fd4c"
 
 [[package]]
 name = "js-sys"
-version = "0.3.68"
+version = "0.3.67"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "406cda4b368d531c842222cf9d2600a9a4acce8d29423695379c6868a143a9ee"
+checksum = "9a1d36f1235bc969acba30b7f5990b864423a6068a10f7c90ae8f0112e3a59d1"
 dependencies = [
  "wasm-bindgen",
 ]
@@ -1854,9 +1855,9 @@ checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
 
 [[package]]
 name = "libc"
-version = "0.2.153"
+version = "0.2.152"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9c198f91728a82281a64e1f4f9eeb25d82cb32a5de251c6bd1b5154d63a8e7bd"
+checksum = "13e3bf6590cbc649f4d1a3eefc9d5d6eb746f5200ffb04e5e142700b8faa56e7"
 
 [[package]]
 name = "libredox"
@@ -1926,9 +1927,9 @@ checksum = "6877bb514081ee2a7ff5ef9de3281f14a4dd4bceac4c09388074a6b5df8a139a"
 
 [[package]]
 name = "miniz_oxide"
-version = "0.7.2"
+version = "0.7.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9d811f3e15f28568be3407c8e7fdb6514c1cda3cb30683f15b6a1a1dc4ea14a7"
+checksum = "e7810e0be55b428ada41041c41f32c9f1a42817901b4ccf45fa3d4b6561e74c7"
 dependencies = [
  "adler",
 ]
@@ -1987,12 +1988,6 @@ dependencies = [
  "serde",
 ]
 
-[[package]]
-name = "num-conv"
-version = "0.1.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "51d515d32fb182ee37cda2ccdcb92950d6a3c2893aa280e540671c2cd0f3b1d9"
-
 [[package]]
 name = "num-derive"
 version = "0.3.3"
@@ -2042,7 +2037,7 @@ version = "1.16.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4161fcb6d602d4d2081af7c3a45852d875a03dd337a6bfdd6e06407b61342a43"
 dependencies = [
- "hermit-abi 0.3.5",
+ "hermit-abi 0.3.4",
  "libc",
 ]
 
@@ -2230,18 +2225,18 @@ checksum = "e3148f5046208a5d56bcfc03053e3ca6334e51da8dfb19b6cdc8b306fae3283e"
 
 [[package]]
 name = "pin-project"
-version = "1.1.4"
+version = "1.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0302c4a0442c456bd56f841aee5c3bfd17967563f6fadc9ceb9f9c23cf3807e0"
+checksum = "fda4ed1c6c173e3fc7a83629421152e01d7b1f9b7f65fb301e490e8cfc656422"
 dependencies = [
  "pin-project-internal",
 ]
 
 [[package]]
 name = "pin-project-internal"
-version = "1.1.4"
+version = "1.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "266c042b60c9c76b8d53061e52b2e0d1116abc57cefc8c5cd671619a56ac3690"
+checksum = "4359fd9c9171ec6e8c62926d6faaf553a8dc3f64e1507e76da7911b4f6a04405"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -2387,11 +2382,11 @@ checksum = "106dd99e98437432fed6519dedecfade6a06a73bb7b2a1e019fdd2bee5778d94"
 
 [[package]]
 name = "pulldown-cmark"
-version = "0.9.6"
+version = "0.9.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "57206b407293d2bcd3af849ce869d52068623f19e1b5ff8e8778e3309439682b"
+checksum = "77a1a2f1f0a7ecff9c31abbe177637be0e97a0aef46cf8738ece09327985d998"
 dependencies = [
- "bitflags 2.4.2",
+ "bitflags 1.3.2",
  "memchr",
  "unicase",
 ]
@@ -2487,7 +2482,7 @@ checksum = "b62dbe01f0b06f9d8dc7d49e05a0785f153b00b2c227856282f671e0318c9b15"
 dependencies = [
  "aho-corasick",
  "memchr",
- "regex-automata 0.4.5",
+ "regex-automata 0.4.4",
  "regex-syntax 0.8.2",
 ]
 
@@ -2502,9 +2497,9 @@ dependencies = [
 
 [[package]]
 name = "regex-automata"
-version = "0.4.5"
+version = "0.4.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5bb987efffd3c6d0d8f5f89510bb458559eab11e4f869acb20bf845e016259cd"
+checksum = "3b7fa1134405e2ec9353fd416b17f8dacd46c473d7d3fd1cf202706a14eb792a"
 dependencies = [
  "aho-corasick",
  "memchr",
@@ -2525,9 +2520,9 @@ checksum = "c08c74e62047bb2de4ff487b251e4a92e24f48745648451635cec7d591162d9f"
 
 [[package]]
 name = "reqwest"
-version = "0.11.24"
+version = "0.11.23"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c6920094eb85afde5e4a138be3f2de8bbdf28000f0029e72c45025a56b042251"
+checksum = "37b1ae8d9ac08420c66222fb9096fc5de435c3c48542bc5336c51892cffafb41"
 dependencies = [
  "base64",
  "bytes",
@@ -2552,7 +2547,6 @@ dependencies = [
  "serde",
  "serde_json",
  "serde_urlencoded",
- "sync_wrapper",
  "system-configuration",
  "tokio",
  "tokio-rustls",
@@ -2805,9 +2799,9 @@ dependencies = [
 
 [[package]]
 name = "serde"
-version = "1.0.196"
+version = "1.0.195"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "870026e60fa08c69f064aa766c10f10b1d62db9ccd4d0abb206472bee0ce3b32"
+checksum = "63261df402c67811e9ac6def069e4786148c4563f4b50fd4bf30aa370d626b02"
 dependencies = [
  "serde_derive",
 ]
@@ -2833,9 +2827,9 @@ dependencies = [
 
 [[package]]
 name = "serde_derive"
-version = "1.0.196"
+version = "1.0.195"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "33c85360c95e7d137454dc81d9a4ed2b8efd8fbe19cee57357b32b9771fccb67"
+checksum = "46fe8f8603d81ba86327b23a2e9cdf49e1255fb94a4c5f297f6ee0547178ea2c"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -2844,9 +2838,9 @@ dependencies = [
 
 [[package]]
 name = "serde_json"
-version = "1.0.113"
+version = "1.0.111"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "69801b70b1c3dac963ecb03a364ba0ceda9cf60c71cfe475e99864759c8b8a79"
+checksum = "176e46fa42316f18edd598015a5166857fc835ec732f5215eac6b7bdbf0a84f4"
 dependencies = [
  "itoa",
  "ryu",
@@ -2901,7 +2895,7 @@ version = "0.9.31"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "adf8a49373e98a4c5f0ceb5d05aa7c648d75f63774981ed95b7c7443bbd50c6e"
 dependencies = [
- "indexmap 2.2.2",
+ "indexmap 2.2.1",
  "itoa",
  "ryu",
  "serde",
@@ -3208,9 +3202,9 @@ checksum = "7b2093cf4c8eb1e67749a6762251bc9cd836b6fc171623bd0a9d324d37af2417"
 
 [[package]]
 name = "tempfile"
-version = "3.10.0"
+version = "3.10.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a365e8cd18e44762ef95d87f284f4b5cd04107fec2ff3052bd6a3e6069669e67"
+checksum = "85b77fafb263dd9d05cbeac119526425676db3784113aa9295c88498cbf8bff1"
 dependencies = [
  "cfg-if 1.0.0",
  "fastrand",
@@ -3327,9 +3321,9 @@ dependencies = [
 
 [[package]]
 name = "tendermint-proto"
-version = "0.34.0"
+version = "0.34.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2cc728a4f9e891d71adf66af6ecaece146f9c7a11312288a3107b3e1d6979aaf"
+checksum = "b797dd3d2beaaee91d2f065e7bdf239dc8d80bba4a183a288bc1279dd5a69a1e"
 dependencies = [
  "bytes",
  "flex-error",
@@ -3431,18 +3425,18 @@ checksum = "222a222a5bfe1bba4a77b45ec488a741b3cb8872e5e499451fd7d0129c9c7c3d"
 
 [[package]]
 name = "thiserror"
-version = "1.0.56"
+version = "1.0.57"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d54378c645627613241d077a3a79db965db602882668f9136ac42af9ecb730ad"
+checksum = "1e45bcbe8ed29775f228095caf2cd67af7a4ccf756ebff23a306bf3e8b47b24b"
 dependencies = [
  "thiserror-impl",
 ]
 
 [[package]]
 name = "thiserror-impl"
-version = "1.0.56"
+version = "1.0.57"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fa0faa943b50f3db30a20aa7e265dbc66076993efed8463e8de414e5d06d3471"
+checksum = "a953cb265bef375dae3de6663da4d3804eee9682ea80d8e2542529b73c531c81"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -3461,12 +3455,11 @@ dependencies = [
 
 [[package]]
 name = "time"
-version = "0.3.34"
+version = "0.3.31"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c8248b6521bb14bc45b4067159b9b6ad792e2d6d754d6c41fb50e29fefe38749"
+checksum = "f657ba42c3f86e7680e53c8cd3af8abbe56b5491790b46e22e19c0d57463583e"
 dependencies = [
  "deranged",
- "num-conv",
  "powerfmt",
  "serde",
  "time-core",
@@ -3481,11 +3474,10 @@ checksum = "ef927ca75afb808a4d64dd374f00a2adf8d0fcff8e7b184af886c3c87ec4a3f3"
 
 [[package]]
 name = "time-macros"
-version = "0.2.17"
+version = "0.2.16"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7ba3a3ef41e6672a2f0f001392bb5dcd3ff0a9992d618ca761a11c3121547774"
+checksum = "26197e33420244aeb70c3e8c78376ca46571bc4e701e4791c2cd9f57dcb3a43f"
 dependencies = [
- "num-conv",
  "time-core",
 ]
 
@@ -3534,9 +3526,9 @@ checksum = "1f3ccbac311fea05f86f61904b462b55fb3df8837a366dfc601a0161d0532f20"
 
 [[package]]
 name = "tokio"
-version = "1.36.0"
+version = "1.35.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "61285f6515fa018fb2d1e46eb21223fff441ee8db5d0f1435e8ab4f5cdb80931"
+checksum = "c89b4efa943be685f629b149f53829423f8f5531ea21249408e8e2f8671ec104"
 dependencies = [
  "backtrace",
  "bytes",
@@ -3618,9 +3610,9 @@ dependencies = [
 
 [[package]]
 name = "toml"
-version = "0.8.10"
+version = "0.8.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9a9aad4a3066010876e8dcf5a8a06e70a558751117a145c6ce2b82c2e2054290"
+checksum = "a1a195ec8c9da26928f773888e0742ca3ca1040c6cd859c919c9f59c1954ab35"
 dependencies = [
  "serde",
  "serde_spanned",
@@ -3639,11 +3631,11 @@ dependencies = [
 
 [[package]]
 name = "toml_edit"
-version = "0.22.4"
+version = "0.21.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0c9ffdf896f8daaabf9b66ba8e77ea1ed5ed0f72821b398aba62352e95062951"
+checksum = "d34d383cd00a163b4a5b85053df514d45bc330f6de7737edfe0a93311d1eaa03"
 dependencies = [
- "indexmap 2.2.2",
+ "indexmap 2.2.1",
  "serde",
  "serde_spanned",
  "toml_datetime",
@@ -4011,9 +4003,9 @@ checksum = "9c8d87e72b64a3b4db28d11ce29237c246188f4f51057d65a7eab63b7987e423"
 
 [[package]]
 name = "wasm-bindgen"
-version = "0.2.91"
+version = "0.2.90"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c1e124130aee3fb58c5bdd6b639a0509486b0338acaaae0c84a5124b0f588b7f"
+checksum = "b1223296a201415c7fad14792dbefaace9bd52b62d33453ade1c5b5f07555406"
 dependencies = [
  "cfg-if 1.0.0",
  "wasm-bindgen-macro",
@@ -4021,9 +4013,9 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-backend"
-version = "0.2.91"
+version = "0.2.90"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c9e7e1900c352b609c8488ad12639a311045f40a35491fb69ba8c12f758af70b"
+checksum = "fcdc935b63408d58a32f8cc9738a0bffd8f05cc7c002086c6ef20b7312ad9dcd"
 dependencies = [
  "bumpalo",
  "log",
@@ -4036,9 +4028,9 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-futures"
-version = "0.4.41"
+version = "0.4.40"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "877b9c3f61ceea0e56331985743b13f3d25c406a7098d45180fb5f09bc19ed97"
+checksum = "bde2032aeb86bdfaecc8b261eef3cba735cc426c1f3a3416d1e0791be95fc461"
 dependencies = [
  "cfg-if 1.0.0",
  "js-sys",
@@ -4048,9 +4040,9 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-macro"
-version = "0.2.91"
+version = "0.2.90"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b30af9e2d358182b5c7449424f017eba305ed32a7010509ede96cdc4696c46ed"
+checksum = "3e4c238561b2d428924c49815533a8b9121c664599558a5d9ec51f8a1740a999"
 dependencies = [
  "quote",
  "wasm-bindgen-macro-support",
@@ -4058,9 +4050,9 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-macro-support"
-version = "0.2.91"
+version = "0.2.90"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "642f325be6301eb8107a83d12a8ac6c1e1c54345a7ef1a9261962dfefda09e66"
+checksum = "bae1abb6806dc1ad9e560ed242107c0f6c84335f1749dd4e8ddb012ebd5e25a7"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -4071,15 +4063,15 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-shared"
-version = "0.2.91"
+version = "0.2.90"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4f186bd2dcf04330886ce82d6f33dd75a7bfcf69ecf5763b89fcde53b6ac9838"
+checksum = "4d91413b1c31d7539ba5ef2451af3f0b833a005eb27a631cec32bc0635a8602b"
 
 [[package]]
 name = "web-sys"
-version = "0.3.68"
+version = "0.3.67"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "96565907687f7aceb35bc5fc03770a8a0471d82e479f25832f54a0e3f4b28446"
+checksum = "58cd2333b6e0be7a39605f0e255892fd7418a682d8da8fe042fe25128794d2ed"
 dependencies = [
  "js-sys",
  "wasm-bindgen",
@@ -4250,9 +4242,9 @@ checksum = "dff9641d1cd4be8d1a070daf9e3773c5f67e78b4d9d42263020c057706765c04"
 
 [[package]]
 name = "winnow"
-version = "0.5.39"
+version = "0.5.34"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5389a154b01683d28c77f8f68f49dea75f0a4da32557a58f68ee51ebba472d29"
+checksum = "b7cf47b659b318dccbd69cc4797a39ae128f533dce7902a1096044d1967b9c16"
 dependencies = [
  "memchr",
 ]
@@ -4286,3 +4278,8 @@ dependencies = [
  "quote",
  "syn 2.0.48",
 ]
+
+[[patch.unused]]
+name = "ibc-proto"
+version = "0.41.0"
+source = "git+https://github.com/cosmos/ibc-proto-rs.git?branch=romac/channel-upgrade-only#0d28c0068634ef3c863e7a56a34c2c2fce222164"
diff --git a/README.md b/README.md
index b816b659e0..98adbc745a 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,7 @@
 # Hermes IBC relayer
 
+![hermes-banner](https://github.com/informalsystems/hermes/assets/1757002/0878ab2a-1c6f-4137-a089-66352f948407)
+
 [![Cosmos ecosystem][cosmos-shield]][cosmos-link]
 
 [![Build Status][build-image]][build-link]
diff --git a/config.toml b/config.toml
index f45e2289cf..63c5881060 100644
--- a/config.toml
+++ b/config.toml
@@ -369,6 +369,13 @@ trust_threshold = '2/3'
 # operational debugging information, e.g., relayer build version.
 memo_prefix = ''
 
+# If this is set to a string, it will overwrite the memo used by Hermes for each transaction
+# it submits to this chain.
+# Default: not set.
+# This is used for chains which have a very small character limit for the memo,
+# and the additional information appended by Hermes would overflow that limit.
+# memo_overwrite = ''
+
 # This section specifies the filters for policy based relaying.
 #
 # Default: no policy / filters, allow all packets on all channels.
diff --git a/crates/chain-registry/Cargo.toml b/crates/chain-registry/Cargo.toml
index d64dcf5f9e..e90d844b40 100644
--- a/crates/chain-registry/Cargo.toml
+++ b/crates/chain-registry/Cargo.toml
@@ -13,7 +13,7 @@ description  = """
 
 [dependencies]
 ibc-relayer-types = { version = "0.27.0", path = "../relayer-types" }
-ibc-proto         = { version = "0.41.0", features = ["serde"] }
+ibc-proto         = { version = "0.42.0", features = ["serde"] }
 tendermint-rpc    = { version = "0.34.0", features = ["http-client", "websocket-client"] }
 
 async-trait = "0.1.72"
diff --git a/crates/relayer-cli/Cargo.toml b/crates/relayer-cli/Cargo.toml
index 8087507ffb..82303a33ff 100644
--- a/crates/relayer-cli/Cargo.toml
+++ b/crates/relayer-cli/Cargo.toml
@@ -38,7 +38,7 @@ console                  = "0.15.5"
 crossbeam-channel        = "0.5.11"
 dialoguer                = "0.11.0"
 dirs-next                = "2.0.0"
-eyre                     = "0.6.8"
+eyre                     = "0.6.12"
 flex-error               = { version = "0.4.4", default-features = false, features = ["std", "eyre_tracer"] }
 futures                  = "0.3.27"
 hdpath                   = "0.6.3"
diff --git a/crates/relayer-cli/src/chain_registry.rs b/crates/relayer-cli/src/chain_registry.rs
index 04b28f21c6..93f68821b1 100644
--- a/crates/relayer-cli/src/chain_registry.rs
+++ b/crates/relayer-cli/src/chain_registry.rs
@@ -160,6 +160,7 @@ where
         client_refresh_rate: default::client_refresh_rate(),
         ccv_consumer_chain: false,
         memo_prefix: Memo::default(),
+        memo_overwrite: None,
         proof_specs: Default::default(),
         trust_threshold: TrustThreshold::default(),
         gas_price: GasPrice {
diff --git a/crates/relayer-cli/src/commands.rs b/crates/relayer-cli/src/commands.rs
index 60879018f5..e922061029 100644
--- a/crates/relayer-cli/src/commands.rs
+++ b/crates/relayer-cli/src/commands.rs
@@ -151,7 +151,11 @@ impl Configurable<Config> for CliCmd {
         for ccfg in config.chains.iter_mut() {
             #[allow(irrefutable_let_patterns)]
             if let ChainConfig::CosmosSdk(ref mut cosmos_ccfg) = ccfg {
-                cosmos_ccfg.memo_prefix.apply_suffix(&suffix);
+                if let Some(memo) = &cosmos_ccfg.memo_overwrite {
+                    cosmos_ccfg.memo_prefix = memo.clone();
+                } else {
+                    cosmos_ccfg.memo_prefix.apply_suffix(&suffix);
+                }
             }
         }
 
diff --git a/crates/relayer-types/Cargo.toml b/crates/relayer-types/Cargo.toml
index d21e814c52..832a660597 100644
--- a/crates/relayer-types/Cargo.toml
+++ b/crates/relayer-types/Cargo.toml
@@ -24,7 +24,7 @@ mocks = ["tendermint-testgen", "clock"]
 
 [dependencies]
 # Proto definitions for all IBC-related interfaces, e.g., connections or channels.
-ibc-proto = { version = "0.41.0", features = ["serde"] }
+ibc-proto = { version = "0.42.0", features = ["serde"] }
 ics23 = { version = "0.11.1", features = ["std", "host-functions"] }
 time = { version = "0.3" }
 serde_derive = { version = "1.0.104" }
@@ -47,7 +47,7 @@ version = "0.34.0"
 features = ["clock"]
 
 [dependencies.tendermint-proto]
-version = "0.34.0"
+version = "0.34.1"
 
 [dependencies.tendermint-light-client-verifier]
 version = "0.34.0"
diff --git a/crates/relayer-types/src/applications/ics27_ica/error.rs b/crates/relayer-types/src/applications/ics27_ica/error.rs
index 52f2027496..4143b2467f 100644
--- a/crates/relayer-types/src/applications/ics27_ica/error.rs
+++ b/crates/relayer-types/src/applications/ics27_ica/error.rs
@@ -8,11 +8,15 @@ define_error! {
     Error {
         Owner
         [ SignerError ]
-            | _ | { "failed to parse owner" },
+        | _ | { "failed to parse owner" },
 
         InvalidConnectionIdentifier
         [ ValidationError ]
-            | _ | { "connection identifier error" },
+        | _ | { "connection identifier error" },
+
+        InvalidOrdering
+        { ordering: i32 }
+        | e | { format_args!("invalid ordering: {}", e.ordering) },
 
         InvalidPacketData
         | _ | { "packet data is None" },
diff --git a/crates/relayer-types/src/applications/ics27_ica/msgs/register.rs b/crates/relayer-types/src/applications/ics27_ica/msgs/register.rs
index 3e2797005a..082cae11ed 100644
--- a/crates/relayer-types/src/applications/ics27_ica/msgs/register.rs
+++ b/crates/relayer-types/src/applications/ics27_ica/msgs/register.rs
@@ -4,6 +4,7 @@ use ibc_proto::ibc::applications::interchain_accounts::controller::v1::MsgRegist
 use ibc_proto::Protobuf;
 
 use crate::applications::ics27_ica::error::Error;
+use crate::core::ics04_channel::channel::Ordering;
 use crate::core::ics04_channel::version::Version;
 use crate::core::ics24_host::error::ValidationError;
 use crate::core::ics24_host::identifier::ConnectionId;
@@ -18,6 +19,7 @@ pub struct MsgRegisterInterchainAccount {
     pub owner: Signer,
     pub connection_id: ConnectionId,
     pub version: Version,
+    pub ordering: Ordering,
 }
 
 impl Msg for MsgRegisterInterchainAccount {
@@ -46,6 +48,8 @@ impl TryFrom<RawMsgRegisterInterchainAccount> for MsgRegisterInterchainAccount {
                 .parse()
                 .map_err(Error::invalid_connection_identifier)?,
             version: value.version.into(),
+            ordering: Ordering::from_i32(value.ordering)
+                .map_err(|_| Error::invalid_ordering(value.ordering))?,
         })
     }
 }
@@ -56,7 +60,65 @@ impl From<MsgRegisterInterchainAccount> for RawMsgRegisterInterchainAccount {
             owner: value.owner.to_string(),
             connection_id: value.connection_id.to_string(),
             version: value.version.to_string(),
-            ordering: 2,
+            ordering: value.ordering as i32,
+        }
+    }
+}
+
+#[allow(clippy::derive_partial_eq_without_eq)]
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct LegacyRawMsgRegisterInterchainAccount {
+    #[prost(string, tag = "1")]
+    pub owner: ::prost::alloc::string::String,
+    #[prost(string, tag = "2")]
+    pub connection_id: ::prost::alloc::string::String,
+    #[prost(string, tag = "3")]
+    pub version: ::prost::alloc::string::String,
+}
+
+#[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)]
+pub struct LegacyMsgRegisterInterchainAccount {
+    pub owner: Signer,
+    pub connection_id: ConnectionId,
+    pub version: Version,
+}
+
+impl Msg for LegacyMsgRegisterInterchainAccount {
+    type ValidationError = ValidationError;
+    type Raw = LegacyRawMsgRegisterInterchainAccount;
+
+    fn route(&self) -> String {
+        crate::keys::ROUTER_KEY.to_string()
+    }
+
+    fn type_url(&self) -> String {
+        TYPE_URL.to_string()
+    }
+}
+
+impl Protobuf<LegacyRawMsgRegisterInterchainAccount> for LegacyMsgRegisterInterchainAccount {}
+
+impl TryFrom<LegacyRawMsgRegisterInterchainAccount> for LegacyMsgRegisterInterchainAccount {
+    type Error = Error;
+
+    fn try_from(value: LegacyRawMsgRegisterInterchainAccount) -> Result<Self, Self::Error> {
+        Ok(LegacyMsgRegisterInterchainAccount {
+            owner: value.owner.parse().map_err(Error::owner)?,
+            connection_id: value
+                .connection_id
+                .parse()
+                .map_err(Error::invalid_connection_identifier)?,
+            version: value.version.into(),
+        })
+    }
+}
+
+impl From<LegacyMsgRegisterInterchainAccount> for LegacyRawMsgRegisterInterchainAccount {
+    fn from(value: LegacyMsgRegisterInterchainAccount) -> Self {
+        LegacyRawMsgRegisterInterchainAccount {
+            owner: value.owner.to_string(),
+            connection_id: value.connection_id.to_string(),
+            version: value.version.to_string(),
         }
     }
 }
diff --git a/crates/relayer-types/src/core/ics04_channel/channel.rs b/crates/relayer-types/src/core/ics04_channel/channel.rs
index 8b984f483c..90b8ba8d4c 100644
--- a/crates/relayer-types/src/core/ics04_channel/channel.rs
+++ b/crates/relayer-types/src/core/ics04_channel/channel.rs
@@ -11,7 +11,6 @@ use ibc_proto::ibc::core::channel::v1::{
     IdentifiedChannel as RawIdentifiedChannel,
 };
 
-use crate::core::ics04_channel::packet::Sequence;
 use crate::core::ics04_channel::{error::Error, version::Version};
 use crate::core::ics24_host::identifier::{ChannelId, ConnectionId, PortId};
 
@@ -70,7 +69,7 @@ impl From<IdentifiedChannelEnd> for RawIdentifiedChannel {
             version: value.channel_end.version.to_string(),
             port_id: value.port_id.to_string(),
             channel_id: value.channel_id.to_string(),
-            upgrade_sequence: 1,
+            upgrade_sequence: value.channel_end.upgrade_sequence,
         }
     }
 }
@@ -82,15 +81,15 @@ pub struct ChannelEnd {
     pub remote: Counterparty,
     pub connection_hops: Vec<ConnectionId>,
     pub version: Version,
-    pub upgrade_sequence: Sequence,
+    pub upgrade_sequence: u64,
 }
 
 impl Display for ChannelEnd {
     fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), FmtError> {
         write!(
             f,
-            "ChannelEnd {{ state: {}, ordering: {}, remote: {}, connection_hops: {}, version: {} }}",
-            self.state, self.ordering, self.remote, PrettySlice(&self.connection_hops), self.version
+            "ChannelEnd {{ state: {}, ordering: {}, remote: {}, connection_hops: {}, version: {}, upgrade_sequence: {} }}",
+            self.state, self.ordering, self.remote, PrettySlice(&self.connection_hops), self.version, self.upgrade_sequence
         )
     }
 }
@@ -103,7 +102,7 @@ impl Default for ChannelEnd {
             remote: Counterparty::default(),
             connection_hops: Vec::new(),
             version: Version::default(),
-            upgrade_sequence: Sequence::from(0), // The value of 0 indicates the channel has never been upgraded
+            upgrade_sequence: 0,
         }
     }
 }
@@ -144,7 +143,7 @@ impl TryFrom<RawChannel> for ChannelEnd {
             remote,
             connection_hops,
             version,
-            Sequence::from(value.upgrade_sequence),
+            value.upgrade_sequence,
         ))
     }
 }
@@ -161,7 +160,7 @@ impl From<ChannelEnd> for RawChannel {
                 .map(|v| v.as_str().to_string())
                 .collect(),
             version: value.version.to_string(),
-            upgrade_sequence: value.upgrade_sequence.into(),
+            upgrade_sequence: value.upgrade_sequence,
         }
     }
 }
@@ -174,7 +173,7 @@ impl ChannelEnd {
         remote: Counterparty,
         connection_hops: Vec<ConnectionId>,
         version: Version,
-        upgrade_sequence: Sequence,
+        upgrade_sequence: u64,
     ) -> Self {
         Self {
             state,
@@ -238,25 +237,25 @@ impl ChannelEnd {
 
     /// Helper function to compare the state of this end with another state.
     pub fn state_matches(&self, other: &State) -> bool {
-        self.state() == other
+        self.state.eq(other)
     }
 
     /// Helper function to compare the order of this end with another order.
     pub fn order_matches(&self, other: &Ordering) -> bool {
-        self.ordering() == other
+        self.ordering.eq(other)
     }
 
     #[allow(clippy::ptr_arg)]
     pub fn connection_hops_matches(&self, other: &Vec<ConnectionId>) -> bool {
-        self.connection_hops() == other
+        self.connection_hops.eq(other)
     }
 
     pub fn counterparty_matches(&self, other: &Counterparty) -> bool {
-        self.counterparty() == other
+        self.counterparty().eq(other)
     }
 
     pub fn version_matches(&self, other: &Version) -> bool {
-        self.version() == other
+        self.version().eq(other)
     }
 }
 
@@ -333,7 +332,7 @@ impl From<Counterparty> for RawCounterparty {
     }
 }
 
-#[derive(Clone, Copy, Debug, PartialEq, Eq, PartialOrd, Ord, Deserialize, Serialize, Default)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Deserialize, Serialize, Default)]
 pub enum Ordering {
     Uninitialized = 0,
     #[default]
@@ -543,7 +542,7 @@ pub mod test_util {
             counterparty: Some(get_dummy_raw_counterparty()),
             connection_hops: vec![ConnectionId::default().to_string()],
             version: "ics20".to_string(), // The version is not validated.
-            upgrade_sequence: 0, // The value of 0 indicates the channel has never been upgraded
+            upgrade_sequence: 0,
         }
     }
 }
diff --git a/crates/relayer-types/src/core/ics04_channel/error.rs b/crates/relayer-types/src/core/ics04_channel/error.rs
index 3006423d05..8fef18e1c2 100644
--- a/crates/relayer-types/src/core/ics04_channel/error.rs
+++ b/crates/relayer-types/src/core/ics04_channel/error.rs
@@ -227,6 +227,14 @@ define_error! {
                     e.given_sequence, e.next_sequence)
             },
 
+        InvalidPacketData
+            {
+                data: String,
+            }
+            | e | {
+                format_args!("Invalid packet data, not a valid hex-encoded string: {}", e.data)
+            },
+
         LowPacketHeight
             {
                 chain_height: Height,
diff --git a/crates/relayer-types/src/core/ics04_channel/events.rs b/crates/relayer-types/src/core/ics04_channel/events.rs
index 6405303457..5fcf32f1b6 100644
--- a/crates/relayer-types/src/core/ics04_channel/events.rs
+++ b/crates/relayer-types/src/core/ics04_channel/events.rs
@@ -1,8 +1,9 @@
 //! Types for the IBC events emitted from Tendermint Websocket by the channels module.
 
-use serde_derive::{Deserialize, Serialize};
 use std::fmt::{Display, Error as FmtError, Formatter};
 use std::str;
+
+use serde_derive::{Deserialize, Serialize};
 use tendermint::abci;
 
 use crate::core::ics04_channel::channel::Ordering;
@@ -23,7 +24,7 @@ pub const COUNTERPARTY_PORT_ID_ATTRIBUTE_KEY: &str = "counterparty_port_id";
 
 /// Packet event attribute keys
 pub const PKT_SEQ_ATTRIBUTE_KEY: &str = "packet_sequence";
-pub const PKT_DATA_ATTRIBUTE_KEY: &str = "packet_data";
+pub const PKT_DATA_ATTRIBUTE_KEY: &str = "packet_data_hex";
 pub const PKT_SRC_PORT_ATTRIBUTE_KEY: &str = "packet_src_port";
 pub const PKT_SRC_CHANNEL_ATTRIBUTE_KEY: &str = "packet_src_channel";
 pub const PKT_DST_PORT_ATTRIBUTE_KEY: &str = "packet_dst_port";
diff --git a/crates/relayer-types/src/core/ics04_channel/msgs/chan_close_confirm.rs b/crates/relayer-types/src/core/ics04_channel/msgs/chan_close_confirm.rs
index 44d810eb89..33b4873899 100644
--- a/crates/relayer-types/src/core/ics04_channel/msgs/chan_close_confirm.rs
+++ b/crates/relayer-types/src/core/ics04_channel/msgs/chan_close_confirm.rs
@@ -3,7 +3,6 @@ use ibc_proto::Protobuf;
 use ibc_proto::ibc::core::channel::v1::MsgChannelCloseConfirm as RawMsgChannelCloseConfirm;
 
 use crate::core::ics04_channel::error::Error;
-use crate::core::ics04_channel::packet::Sequence;
 use crate::core::ics24_host::identifier::{ChannelId, PortId};
 use crate::proofs::Proofs;
 use crate::signer::Signer;
@@ -11,31 +10,27 @@ use crate::tx_msg::Msg;
 
 pub const TYPE_URL: &str = "/ibc.core.channel.v1.MsgChannelCloseConfirm";
 
+///
 /// Message definition for the second step in the channel close handshake (the `ChanCloseConfirm`
 /// datagram).
+///
 #[derive(Clone, Debug, PartialEq, Eq)]
 pub struct MsgChannelCloseConfirm {
     pub port_id: PortId,
     pub channel_id: ChannelId,
     pub proofs: Proofs,
     pub signer: Signer,
-    pub counterparty_upgrade_sequence: Sequence,
+    pub counterparty_upgrade_sequence: u64,
 }
 
 impl MsgChannelCloseConfirm {
-    pub fn new(
-        port_id: PortId,
-        channel_id: ChannelId,
-        proofs: Proofs,
-        signer: Signer,
-        counterparty_upgrade_sequence: Sequence,
-    ) -> Self {
+    pub fn new(port_id: PortId, channel_id: ChannelId, proofs: Proofs, signer: Signer) -> Self {
         Self {
             port_id,
             channel_id,
             proofs,
             signer,
-            counterparty_upgrade_sequence,
+            counterparty_upgrade_sequence: 0,
         }
     }
 }
@@ -80,7 +75,7 @@ impl TryFrom<RawMsgChannelCloseConfirm> for MsgChannelCloseConfirm {
             channel_id: raw_msg.channel_id.parse().map_err(Error::identifier)?,
             proofs,
             signer: raw_msg.signer.parse().map_err(Error::signer)?,
-            counterparty_upgrade_sequence: raw_msg.counterparty_upgrade_sequence.into(),
+            counterparty_upgrade_sequence: raw_msg.counterparty_upgrade_sequence,
         })
     }
 }
@@ -93,7 +88,7 @@ impl From<MsgChannelCloseConfirm> for RawMsgChannelCloseConfirm {
             proof_init: domain_msg.proofs.object_proof().clone().into(),
             proof_height: Some(domain_msg.proofs.height().into()),
             signer: domain_msg.signer.to_string(),
-            counterparty_upgrade_sequence: domain_msg.counterparty_upgrade_sequence.into(),
+            counterparty_upgrade_sequence: domain_msg.counterparty_upgrade_sequence,
         }
     }
 }
@@ -118,7 +113,7 @@ pub mod test_util {
                 revision_height: proof_height,
             }),
             signer: get_dummy_bech32_account(),
-            counterparty_upgrade_sequence: 1,
+            counterparty_upgrade_sequence: 0,
         }
     }
 }
diff --git a/crates/relayer-types/src/core/ics04_channel/msgs/timeout_on_close.rs b/crates/relayer-types/src/core/ics04_channel/msgs/timeout_on_close.rs
index 17a47fe2a0..c83ee0417e 100644
--- a/crates/relayer-types/src/core/ics04_channel/msgs/timeout_on_close.rs
+++ b/crates/relayer-types/src/core/ics04_channel/msgs/timeout_on_close.rs
@@ -18,7 +18,7 @@ pub struct MsgTimeoutOnClose {
     pub next_sequence_recv: Sequence,
     pub proofs: Proofs,
     pub signer: Signer,
-    pub counterparty_upgrade_sequence: Sequence,
+    pub counterparty_upgrade_sequence: u64,
 }
 
 impl MsgTimeoutOnClose {
@@ -27,7 +27,7 @@ impl MsgTimeoutOnClose {
         next_sequence_recv: Sequence,
         proofs: Proofs,
         signer: Signer,
-        counterparty_upgrade_sequence: Sequence,
+        counterparty_upgrade_sequence: u64,
     ) -> MsgTimeoutOnClose {
         Self {
             packet,
@@ -89,7 +89,7 @@ impl TryFrom<RawMsgTimeoutOnClose> for MsgTimeoutOnClose {
             next_sequence_recv: Sequence::from(raw_msg.next_sequence_recv),
             signer: raw_msg.signer.parse().map_err(Error::signer)?,
             proofs,
-            counterparty_upgrade_sequence: raw_msg.counterparty_upgrade_sequence.into(),
+            counterparty_upgrade_sequence: raw_msg.counterparty_upgrade_sequence,
         })
     }
 }
@@ -106,7 +106,7 @@ impl From<MsgTimeoutOnClose> for RawMsgTimeoutOnClose {
             proof_height: Some(domain_msg.proofs.height().into()),
             next_sequence_recv: domain_msg.next_sequence_recv.into(),
             signer: domain_msg.signer.to_string(),
-            counterparty_upgrade_sequence: domain_msg.counterparty_upgrade_sequence.into(),
+            counterparty_upgrade_sequence: domain_msg.counterparty_upgrade_sequence,
         }
     }
 }
diff --git a/crates/relayer-types/src/events.rs b/crates/relayer-types/src/events.rs
index 92a03853bb..ea4156b7f6 100644
--- a/crates/relayer-types/src/events.rs
+++ b/crates/relayer-types/src/events.rs
@@ -66,9 +66,9 @@ define_error! {
             [ TraceError<prost::DecodeError> ]
             | _ | { "error decoding protobuf" },
 
-        SubtleEncoding
-            [ TraceError<subtle_encoding::Error> ]
-            | _ | { "error decoding hex" },
+        InvalidPacketData
+            { data: String }
+            | e | { format_args!("error decoding hex-encoded packet data: {}", e.data) },
 
         MissingActionString
             | _ | { "missing action string" },
diff --git a/crates/relayer-types/src/mock/client_state.rs b/crates/relayer-types/src/mock/client_state.rs
index c4081ab3bf..98917b0ef0 100644
--- a/crates/relayer-types/src/mock/client_state.rs
+++ b/crates/relayer-types/src/mock/client_state.rs
@@ -57,6 +57,8 @@ impl From<MockClientState> for RawMockClientState {
                 height: Some(value.header.height().into()),
                 timestamp: value.header.timestamp.nanoseconds(),
             }),
+            frozen: false,
+            trusting_period: 14 * 24 * 60 * 60,
         }
     }
 }
diff --git a/crates/relayer/Cargo.toml b/crates/relayer/Cargo.toml
index 5ed88c5893..1dbe5efd62 100644
--- a/crates/relayer/Cargo.toml
+++ b/crates/relayer/Cargo.toml
@@ -20,7 +20,7 @@ default   = ["flex-error/std", "flex-error/eyre_tracer"]
 telemetry = ["ibc-telemetry"]
 
 [dependencies]
-ibc-proto         = { version = "0.41.0", features = ["serde"] }
+ibc-proto         = { version = "0.42.0", features = ["serde"] }
 ibc-telemetry     = { version = "0.27.0", path = "../telemetry", optional = true }
 ibc-relayer-types = { version = "0.27.0", path = "../relayer-types", features = ["mocks"] }
 
@@ -28,7 +28,7 @@ subtle-encoding = "0.5"
 humantime-serde = "1.1.1"
 serde = "1.0"
 serde_derive = "1.0"
-thiserror = "1.0.56"
+thiserror = "1.0.57"
 toml = "0.8"
 tracing = "0.1.36"
 tokio = { version = "1.0", features = ["rt-multi-thread", "time", "sync"] }
@@ -58,7 +58,7 @@ anyhow = "1.0"
 semver = "1.0"
 humantime = "2.1.0"
 regex = "1"
-moka = { version = "0.12.0", features = ["sync"] }
+moka = { version = "0.12.5", features = ["sync"] }
 uuid = { version = "1.7.0", features = ["v4"] }
 bs58 = "0.5.0"
 digest = "0.10.6"
@@ -66,7 +66,7 @@ ed25519 = "2.2.2"
 ed25519-dalek = { version = "2.0.0", features = ["serde"] }
 ed25519-dalek-bip32 = "0.3.0"
 generic-array = "0.14.7"
-secp256k1 = { version = "0.28.1", features = ["rand-std"] }
+secp256k1 = { version = "0.28.2", features = ["rand-std"] }
 strum = { version = "0.25", features = ["derive"] }
 tokio-stream = "0.1.14"
 once_cell = "1.19.0"
@@ -90,7 +90,7 @@ version = "0.34.0"
 features = ["secp256k1"]
 
 [dependencies.tendermint-proto]
-version = "0.34.0"
+version = "0.34.1"
 
 [dependencies.tendermint-rpc]
 version = "0.34.0"
diff --git a/crates/relayer/src/chain/cosmos.rs b/crates/relayer/src/chain/cosmos.rs
index f07579fc84..031fc81778 100644
--- a/crates/relayer/src/chain/cosmos.rs
+++ b/crates/relayer/src/chain/cosmos.rs
@@ -1066,17 +1066,17 @@ impl ChainEndpoint for CosmosSdkChain {
     /// further checks.
     fn health_check(&mut self) -> Result<HealthCheck, Error> {
         if let Err(e) = do_health_check(self) {
-            warn!("Health checkup for chain '{}' failed", self.id());
-            warn!("    Reason: {}", e.detail());
-            warn!("    Some Hermes features may not work in this mode!");
+            warn!("health check failed for chain '{}'", self.id());
+            warn!("reason: {}", e.detail());
+            warn!("some Hermes features may not work in this mode!");
 
             return Ok(HealthCheck::Unhealthy(Box::new(e)));
         }
 
         if let Err(e) = self.validate_params() {
-            warn!("Hermes might be misconfigured for chain '{}'", self.id());
-            warn!("    Reason: {}", e.detail());
-            warn!("    Some Hermes features may not work in this mode!");
+            warn!("found potential misconfiguration for chain '{}'", self.id());
+            warn!("reason: {}", e.detail());
+            warn!("some Hermes features may not work in this mode!");
 
             return Ok(HealthCheck::Unhealthy(Box::new(e)));
         }
@@ -2498,7 +2498,7 @@ fn do_health_check(chain: &CosmosSdkChain) -> Result<(), Error> {
 
         if !found_matching_denom {
             warn!(
-                "Chain '{}' has no minimum gas price of denomination '{}' \
+                "chain '{}' has no minimum gas price of denomination '{}' \
                 that is strictly less than the `gas_price` specified for \
                 that chain in the Hermes configuration. \
                 This is usually a sign of misconfiguration, please check your chain and Hermes configurations",
@@ -2507,7 +2507,7 @@ fn do_health_check(chain: &CosmosSdkChain) -> Result<(), Error> {
         }
     } else {
         warn!(
-            "Chain '{}' has no minimum gas price value configured for denomination '{}'. \
+            "chain '{}' has no minimum gas price value configured for denomination '{}'. \
             This is usually a sign of misconfiguration, please check your chain and \
             relayer configurations",
             chain_id, relayer_gas_price.denom
@@ -2517,7 +2517,7 @@ fn do_health_check(chain: &CosmosSdkChain) -> Result<(), Error> {
     let version_specs = chain.block_on(fetch_version_specs(&chain.config.id, &chain.grpc_addr))?;
 
     if let Err(diagnostic) = compatibility::run_diagnostic(&version_specs) {
-        return Err(Error::sdk_module_version(
+        return Err(Error::compat_check_failed(
             chain_id.clone(),
             grpc_address,
             diagnostic.to_string(),
diff --git a/crates/relayer/src/chain/cosmos/compatibility.rs b/crates/relayer/src/chain/cosmos/compatibility.rs
index 990fc0b60a..f997081d92 100644
--- a/crates/relayer/src/chain/cosmos/compatibility.rs
+++ b/crates/relayer/src/chain/cosmos/compatibility.rs
@@ -24,12 +24,18 @@ const IBC_GO_MODULE_VERSION_REQ: &str = ">=4.1.1, <9";
 
 #[derive(Error, Debug)]
 pub enum Diagnostic {
+    #[error("SDK module version not found, required {requirements}")]
+    MissingSdkModuleVersion { requirements: String },
+
+    #[error("IBC-Go module version not found, required {requirements}")]
+    MissingIbcGoModuleVersion { requirements: String },
+
     #[error(
         "SDK module at version '{found}' does not meet compatibility requirements {requirements}"
     )]
     MismatchingSdkModuleVersion { requirements: String, found: String },
 
-    #[error("Ibc-Go module at version '{found}' does not meet compatibility requirements {requirements}")]
+    #[error("IBC-Go module at version '{found}' does not meet compatibility requirements {requirements}")]
     MismatchingIbcGoModuleVersion { requirements: String, found: String },
 }
 
@@ -44,40 +50,44 @@ pub enum Diagnostic {
 /// Sdk module by name, as well as the constants
 /// [`SDK_MODULE_VERSION_REQ`] and [`IBC_GO_MODULE_VERSION_REQ`]
 /// for establishing compatibility requirements.
-pub(crate) fn run_diagnostic(v: &version::Specs) -> Result<(), Diagnostic> {
-    debug!("running diagnostic on version info {}", v);
+pub(crate) fn run_diagnostic(specs: &version::Specs) -> Result<(), Diagnostic> {
+    debug!("running diagnostic on version specs: {specs}");
 
-    sdk_diagnostic(&v.cosmos_sdk)?;
-    ibc_go_diagnostic(v.ibc_go.as_ref())?;
+    sdk_diagnostic(specs.cosmos_sdk.as_ref())?;
+    ibc_go_diagnostic(specs.ibc_go.as_ref())?;
 
     Ok(())
 }
 
-fn sdk_diagnostic(version: &semver::Version) -> Result<(), Diagnostic> {
+fn sdk_diagnostic(version: Option<&semver::Version>) -> Result<(), Diagnostic> {
     // Parse the SDK requirements into a semver
     let sdk_reqs = semver::VersionReq::parse(SDK_MODULE_VERSION_REQ)
         .expect("parsing the SDK module requirements into semver");
 
-    // Finally, check the version requirements
-    match sdk_reqs.matches(version) {
-        true => Ok(()),
-        false => Err(Diagnostic::MismatchingSdkModuleVersion {
+    match version {
+        None => Err(Diagnostic::MissingSdkModuleVersion {
             requirements: SDK_MODULE_VERSION_REQ.to_string(),
-            found: version.to_string(),
         }),
+
+        Some(version) => match sdk_reqs.matches(version) {
+            true => Ok(()),
+            false => Err(Diagnostic::MismatchingSdkModuleVersion {
+                requirements: SDK_MODULE_VERSION_REQ.to_string(),
+                found: version.to_string(),
+            }),
+        },
     }
 }
 
-fn ibc_go_diagnostic(version_info: Option<&semver::Version>) -> Result<(), Diagnostic> {
+fn ibc_go_diagnostic(version: Option<&semver::Version>) -> Result<(), Diagnostic> {
     // Parse the IBC-go module requirements into a semver
     let ibc_reqs = semver::VersionReq::parse(IBC_GO_MODULE_VERSION_REQ)
         .expect("parsing the IBC-Go module requirements into semver");
 
-    // Find the Ibc-Go module
-    match version_info {
-        // If binary lacks the ibc-go dependency it is _not_ an error,
-        // we support chains without the standalone ibc-go module.
-        None => Ok(()),
+    match version {
+        None => Err(Diagnostic::MissingIbcGoModuleVersion {
+            requirements: IBC_GO_MODULE_VERSION_REQ.to_string(),
+        }),
         Some(version) => match ibc_reqs.matches(version) {
             true => Ok(()),
             false => Err(Diagnostic::MismatchingIbcGoModuleVersion {
diff --git a/crates/relayer/src/chain/cosmos/config.rs b/crates/relayer/src/chain/cosmos/config.rs
index 57314bccf5..a81ede704a 100644
--- a/crates/relayer/src/chain/cosmos/config.rs
+++ b/crates/relayer/src/chain/cosmos/config.rs
@@ -106,6 +106,9 @@ pub struct CosmosSdkConfig {
     #[serde(default)]
     pub memo_prefix: Memo,
 
+    #[serde(default)]
+    pub memo_overwrite: Option<Memo>,
+
     // This is an undocumented and hidden config to make the relayer wait for
     // DeliverTX before sending the next transaction when sending messages in
     // multiple batches. We will instruct relayer operators to turn this on
diff --git a/crates/relayer/src/chain/cosmos/estimate.rs b/crates/relayer/src/chain/cosmos/estimate.rs
index 87a18a26b4..461ab6ae14 100644
--- a/crates/relayer/src/chain/cosmos/estimate.rs
+++ b/crates/relayer/src/chain/cosmos/estimate.rs
@@ -14,6 +14,7 @@ use crate::chain::cosmos::types::gas::GasConfig;
 use crate::config::types::Memo;
 use crate::error::Error;
 use crate::keyring::Secp256k1KeyPair;
+use crate::telemetry;
 use crate::util::pretty::PrettyFee;
 
 pub async fn estimate_tx_fees(
@@ -51,6 +52,7 @@ pub async fn estimate_tx_fees(
         &config.rpc_address,
         &config.chain_id,
         tx,
+        account,
     )
     .await?;
 
@@ -63,6 +65,7 @@ async fn estimate_fee_with_tx(
     rpc_address: &Url,
     chain_id: &ChainId,
     tx: Tx,
+    account: &Account,
 ) -> Result<Fee, Error> {
     let estimated_gas = {
         crate::time!(
@@ -72,7 +75,7 @@ async fn estimate_fee_with_tx(
             }
 
         );
-        estimate_gas_with_tx(gas_config, grpc_address, tx).await
+        estimate_gas_with_tx(gas_config, grpc_address, tx, account).await
     }?;
 
     if estimated_gas > gas_config.max_gas {
@@ -112,6 +115,7 @@ async fn estimate_gas_with_tx(
     gas_config: &GasConfig,
     grpc_address: &Uri,
     tx: Tx,
+    account: &Account,
 ) -> Result<u64, Error> {
     let simulated_gas = send_tx_simulate(grpc_address, tx)
         .await
@@ -147,6 +151,13 @@ async fn estimate_gas_with_tx(
                 e.detail()
             );
 
+            telemetry!(
+                simulate_errors,
+                &account.address.to_string(),
+                true,
+                get_error_text(&e),
+            );
+
             Ok(gas_config.default_gas)
         }
 
@@ -155,6 +166,14 @@ async fn estimate_gas_with_tx(
                 "failed to simulate tx. propagating error to caller: {}",
                 e.detail()
             );
+
+            telemetry!(
+                simulate_errors,
+                &account.address.to_string(),
+                false,
+                get_error_text(&e),
+            );
+
             // Propagate the error, the retrying mechanism at caller may catch & retry.
             Err(e)
         }
@@ -171,7 +190,17 @@ fn can_recover_from_simulation_failure(e: &Error) -> bool {
             detail.is_client_state_height_too_low()
                 || detail.is_account_sequence_mismatch_that_can_be_ignored()
                 || detail.is_out_of_order_packet_sequence_error()
+                || detail.is_empty_tx_error()
         }
         _ => false,
     }
 }
+
+fn get_error_text(e: &Error) -> String {
+    use crate::error::ErrorDetail::*;
+
+    match e.detail() {
+        GrpcStatus(detail) => detail.status.code().to_string(),
+        detail => detail.to_string(),
+    }
+}
diff --git a/crates/relayer/src/chain/cosmos/query/custom.rs b/crates/relayer/src/chain/cosmos/query/custom.rs
index e842510b1b..80740aa0dd 100644
--- a/crates/relayer/src/chain/cosmos/query/custom.rs
+++ b/crates/relayer/src/chain/cosmos/query/custom.rs
@@ -10,7 +10,7 @@ pub async fn cross_chain_query_via_rpc(
     client: &HttpClient,
     cross_chain_query_request: CrossChainQueryRequest,
 ) -> Result<CrossChainQueryResponse, Error> {
-    let hex_decoded_request = hex::decode(cross_chain_query_request.request)
+    let hex_decoded_request = hex::decode(cross_chain_query_request.request.to_lowercase())
         .map_err(|_| Error::ics31(CrossChainQueryError::parse()))?;
 
     let response = client
diff --git a/crates/relayer/src/chain/cosmos/types/events/channel.rs b/crates/relayer/src/chain/cosmos/types/events/channel.rs
index fa09493913..442d73a21d 100644
--- a/crates/relayer/src/chain/cosmos/types/events/channel.rs
+++ b/crates/relayer/src/chain/cosmos/types/events/channel.rs
@@ -66,11 +66,7 @@ macro_rules! impl_try_from_raw_obj_for_packet {
             type Error = EventError;
 
             fn try_from(obj: RawObject<'_>) -> Result<Self, Self::Error> {
-                let data_str: String = extract_attribute(&obj, &format!("{}.{}", obj.action, PKT_DATA_ATTRIBUTE_KEY))?;
-
-                let mut packet = Packet::try_from(obj)?;
-                packet.data = Vec::from(data_str.as_str().as_bytes());
-
+                let packet = Packet::try_from(obj)?;
                 Ok(Self { packet })
             }
         })+
@@ -89,13 +85,10 @@ impl TryFrom<RawObject<'_>> for WriteAcknowledgement {
     type Error = EventError;
 
     fn try_from(obj: RawObject<'_>) -> Result<Self, Self::Error> {
-        let data_str: String =
-            extract_attribute(&obj, &format!("{}.{}", obj.action, PKT_DATA_ATTRIBUTE_KEY))?;
         let ack = extract_attribute(&obj, &format!("{}.{}", obj.action, PKT_ACK_ATTRIBUTE_KEY))?
             .into_bytes();
 
-        let mut packet = Packet::try_from(obj)?;
-        packet.data = Vec::from(data_str.as_bytes());
+        let packet = Packet::try_from(obj)?;
 
         Ok(Self { packet, ack })
     }
@@ -117,7 +110,14 @@ pub fn parse_timeout_height(s: &str) -> Result<TimeoutHeight, Error> {
 
 impl TryFrom<RawObject<'_>> for Packet {
     type Error = EventError;
+
     fn try_from(obj: RawObject<'_>) -> Result<Self, Self::Error> {
+        let data_str =
+            extract_attribute(&obj, &format!("{}.{}", obj.action, PKT_DATA_ATTRIBUTE_KEY))?;
+
+        let data = hex::decode(data_str.to_lowercase())
+            .map_err(|_| EventError::invalid_packet_data(data_str))?;
+
         Ok(Packet {
             sequence: extract_attribute(
                 &obj,
@@ -125,31 +125,37 @@ impl TryFrom<RawObject<'_>> for Packet {
             )?
             .parse()
             .map_err(EventError::channel)?,
+
             source_port: extract_attribute(
                 &obj,
                 &format!("{}.{}", obj.action, PKT_SRC_PORT_ATTRIBUTE_KEY),
             )?
             .parse()
             .map_err(EventError::parse)?,
+
             source_channel: extract_attribute(
                 &obj,
                 &format!("{}.{}", obj.action, PKT_SRC_CHANNEL_ATTRIBUTE_KEY),
             )?
             .parse()
             .map_err(EventError::parse)?,
+
             destination_port: extract_attribute(
                 &obj,
                 &format!("{}.{}", obj.action, PKT_DST_PORT_ATTRIBUTE_KEY),
             )?
             .parse()
             .map_err(EventError::parse)?,
+
             destination_channel: extract_attribute(
                 &obj,
                 &format!("{}.{}", obj.action, PKT_DST_CHANNEL_ATTRIBUTE_KEY),
             )?
             .parse()
             .map_err(EventError::parse)?,
-            data: vec![],
+
+            data,
+
             timeout_height: {
                 let timeout_height_str = extract_attribute(
                     &obj,
diff --git a/crates/relayer/src/chain/cosmos/version.rs b/crates/relayer/src/chain/cosmos/version.rs
index e6987eebb5..a75c4ed822 100644
--- a/crates/relayer/src/chain/cosmos/version.rs
+++ b/crates/relayer/src/chain/cosmos/version.rs
@@ -22,20 +22,15 @@ use ibc_proto::cosmos::base::tendermint::v1beta1::VersionInfo;
 ///    sum: "h1:yaD4PyOx0LnyfiWasC5egg1U76lT83GRxjJjupPo7Gk=",
 /// },
 /// ```
-const SDK_MODULE_NAME: &str = "cosmos/cosmos-sdk";
-const IBC_GO_MODULE_NAME: &str = "cosmos/ibc-go";
-const TENDERMINT_MODULE_NAME: &str = "tendermint/tendermint";
-const COMET_MODULE_NAME: &str = "cometbft/cometbft";
+const SDK_MODULE_NAME: &str = "github.com/cosmos/cosmos-sdk";
+const IBC_GO_MODULE_NAME: &str = "github.com/cosmos/ibc-go";
+const TENDERMINT_MODULE_NAME: &str = "github.com/tendermint/tendermint";
+const COMET_MODULE_NAME: &str = "github.com/cometbft/cometbft";
 
-/// Captures the version(s) specification of different
-/// modules of a network.
-///
-/// Assumes that the network runs on Cosmos SDK.
-/// Stores both the SDK version as well as
-/// the IBC-go module version (if existing).
+/// Captures the version(s) specification of different modules of a network.
 #[derive(Debug)]
 pub struct Specs {
-    pub cosmos_sdk: semver::Version,
+    pub cosmos_sdk: Option<semver::Version>,
     pub ibc_go: Option<semver::Version>,
     pub tendermint: Option<semver::Version>,
     pub comet: Option<semver::Version>,
@@ -43,6 +38,12 @@ pub struct Specs {
 
 impl Display for Specs {
     fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), FmtError> {
+        let cosmos_sdk = self
+            .cosmos_sdk
+            .as_ref()
+            .map(|v| v.to_string())
+            .unwrap_or_else(|| "UNKNOWN".to_string());
+
         let ibc_go = self
             .ibc_go
             .as_ref()
@@ -64,20 +65,13 @@ impl Display for Specs {
         write!(
             f,
             "Cosmos SDK {}, IBC-Go {}, Tendermint {}, CometBFT {}",
-            self.cosmos_sdk, ibc_go, tendermint, comet
+            cosmos_sdk, ibc_go, tendermint, comet
         )
     }
 }
 
 define_error! {
     Error {
-        SdkModuleNotFound
-            {
-                address: String,
-                app: AppInfo,
-            }
-            |e| { format!("failed to find the SDK module dependency ('{}') for application {}", e.address, e.app) },
-
         ConsensusModuleNotFound
             {
                 tendermint: String,
@@ -121,7 +115,7 @@ impl TryFrom<VersionInfo> for Specs {
             application = %raw_version.app_name,
             version = %raw_version.version,
             git_commit = %raw_version.git_commit,
-            sdk_version = %sdk_version,
+            sdk_version = ?sdk_version,
             ibc_go_status = ?ibc_go_version,
             tendermint_version = ?tendermint_version,
             comet_version = ?comet_version,
@@ -137,33 +131,8 @@ impl TryFrom<VersionInfo> for Specs {
     }
 }
 
-fn parse_sdk_version(version_info: &VersionInfo) -> Result<semver::Version, Error> {
-    let module = version_info
-        .build_deps
-        .iter()
-        .find(|&m| m.path.contains(SDK_MODULE_NAME))
-        .ok_or_else(|| {
-            Error::sdk_module_not_found(SDK_MODULE_NAME.to_string(), AppInfo::from(version_info))
-        })?;
-
-    // The raw version number has a leading 'v', trim it out;
-    let plain_version = module.version.trim_start_matches('v');
-
-    // Parse the module version
-    let mut version = semver::Version::parse(plain_version).map_err(|e| {
-        Error::version_parsing_failed(
-            module.path.clone(),
-            module.version.clone(),
-            e.to_string(),
-            AppInfo::from(version_info),
-        )
-    })?;
-
-    // Remove the pre-release version to ensure we treat pre-releases of the SDK
-    // as their normal version, eg. 0.42.0-rc2 should satisfy >=0.41.3, <= 0.42.6.
-    version.pre = semver::Prerelease::EMPTY;
-
-    Ok(version)
+fn parse_sdk_version(version_info: &VersionInfo) -> Result<Option<semver::Version>, Error> {
+    parse_optional_version(version_info, SDK_MODULE_NAME)
 }
 
 fn parse_ibc_go_version(version_info: &VersionInfo) -> Result<Option<semver::Version>, Error> {
@@ -185,7 +154,7 @@ fn parse_optional_version(
     match version_info
         .build_deps
         .iter()
-        .find(|&m| m.path.contains(module_name))
+        .find(|&m| m.path == module_name)
     {
         None => Ok(None),
         Some(module) => {
diff --git a/crates/relayer/src/chain/tracking.rs b/crates/relayer/src/chain/tracking.rs
index 62f89ca096..589ad305f2 100644
--- a/crates/relayer/src/chain/tracking.rs
+++ b/crates/relayer/src/chain/tracking.rs
@@ -15,7 +15,7 @@ pub enum TrackingId {
     /// the CLI or during packet clearing.
     Static(&'static str),
     /// Random identifier used to track latency of packet clearing.
-    ClearedUuid(Uuid),
+    PacketClearing(Uuid),
 }
 
 impl TrackingId {
@@ -29,8 +29,13 @@ impl TrackingId {
         Self::Static(s)
     }
 
-    pub fn new_cleared_uuid() -> Self {
-        Self::ClearedUuid(Uuid::new_v4())
+    pub fn new_packet_clearing() -> Self {
+        Self::PacketClearing(Uuid::new_v4())
+    }
+
+    /// Indicates whether a packet clearing process is currently in-progress.
+    pub fn is_clearing(&self) -> bool {
+        matches!(self, Self::PacketClearing(_))
     }
 }
 
@@ -43,7 +48,7 @@ impl Display for TrackingId {
                 s.fmt(f)
             }
             TrackingId::Static(s) => s.fmt(f),
-            TrackingId::ClearedUuid(u) => {
+            TrackingId::PacketClearing(u) => {
                 let mut uuid = "cleared/".to_owned();
                 let mut s = u.to_string();
                 s.truncate(8);
diff --git a/crates/relayer/src/channel.rs b/crates/relayer/src/channel.rs
index 9b38a3f7a1..3f24009692 100644
--- a/crates/relayer/src/channel.rs
+++ b/crates/relayer/src/channel.rs
@@ -3,7 +3,6 @@ use ibc_proto::ibc::core::channel::v1::QueryUpgradeRequest;
 use ibc_relayer_types::core::ics04_channel::msgs::chan_upgrade_ack::MsgChannelUpgradeAck;
 use ibc_relayer_types::core::ics04_channel::msgs::chan_upgrade_confirm::MsgChannelUpgradeConfirm;
 use ibc_relayer_types::core::ics04_channel::msgs::chan_upgrade_open::MsgChannelUpgradeOpen;
-use ibc_relayer_types::core::ics04_channel::packet::Sequence;
 use ibc_relayer_types::core::ics04_channel::upgrade_fields::UpgradeFields;
 
 use core::fmt::{Display, Error as FmtError, Formatter};
@@ -899,7 +898,7 @@ impl<ChainA: ChainHandle, ChainB: ChainHandle> Channel<ChainA, ChainB> {
             counterparty,
             vec![self.dst_connection_id().clone()],
             version,
-            Sequence::from(0),
+            0,
         );
 
         // Build the domain type message
@@ -979,7 +978,7 @@ impl<ChainA: ChainHandle, ChainB: ChainHandle> Channel<ChainA, ChainB> {
             counterparty,
             vec![self.dst_connection_id().clone()],
             Version::empty(),
-            Sequence::from(0),
+            0,
         );
 
         // Retrieve existing channel
@@ -1071,7 +1070,7 @@ impl<ChainA: ChainHandle, ChainB: ChainHandle> Channel<ChainA, ChainB> {
             counterparty,
             vec![self.dst_connection_id().clone()],
             version,
-            Sequence::from(0),
+            0,
         );
 
         // Get signer
@@ -1546,10 +1545,6 @@ impl<ChainA: ChainHandle, ChainB: ChainHandle> Channel<ChainA, ChainB> {
         }
 
         if let Some(new_ordering) = new_ordering {
-            if new_ordering == Ordering::Uninitialized || new_ordering > channel_end.ordering {
-                return Err(ChannelError::invalid_channel_upgrade_ordering());
-            }
-
             channel_end.ordering = new_ordering;
         }
 
@@ -1735,7 +1730,7 @@ impl<ChainA: ChainHandle, ChainB: ChainHandle> Channel<ChainA, ChainB> {
             channel_id: dst_channel_id.clone(),
             proposed_upgrade_connection_hops: dst_channel_end.connection_hops,
             counterparty_upgrade_fields: upgrade.fields,
-            counterparty_upgrade_sequence: channel_end.upgrade_sequence,
+            counterparty_upgrade_sequence: channel_end.upgrade_sequence.into(),
             proof_channel: src_proof.object_proof().clone(),
             proof_upgrade,
             proof_height: src_proof.height(),
@@ -2055,7 +2050,7 @@ impl<ChainA: ChainHandle, ChainB: ChainHandle> Channel<ChainA, ChainB> {
             port_id: dst_port_id.clone(),
             channel_id: dst_channel_id.clone(),
             counterparty_channel_state: src_channel_end.state,
-            counterparty_upgrade_sequence,
+            counterparty_upgrade_sequence: counterparty_upgrade_sequence.into(),
             proof_channel: proofs.object_proof().clone(),
             proof_height: proofs.height(),
             signer,
diff --git a/crates/relayer/src/config.rs b/crates/relayer/src/config.rs
index 2f335e13d0..ec0afdaf34 100644
--- a/crates/relayer/src/config.rs
+++ b/crates/relayer/src/config.rs
@@ -414,6 +414,9 @@ pub struct Packets {
     pub ics20_max_memo_size: Ics20FieldSizeLimit,
     #[serde(default = "default::ics20_max_receiver_size")]
     pub ics20_max_receiver_size: Ics20FieldSizeLimit,
+
+    #[serde(skip)]
+    pub force_disable_clear_on_start: bool,
 }
 
 impl Default for Packets {
@@ -426,6 +429,7 @@ impl Default for Packets {
             auto_register_counterparty_payee: default::auto_register_counterparty_payee(),
             ics20_max_memo_size: default::ics20_max_memo_size(),
             ics20_max_receiver_size: default::ics20_max_receiver_size(),
+            force_disable_clear_on_start: false,
         }
     }
 }
diff --git a/crates/relayer/src/error.rs b/crates/relayer/src/error.rs
index 857c0057ea..3392a0b452 100644
--- a/crates/relayer/src/error.rs
+++ b/crates/relayer/src/error.rs
@@ -494,14 +494,14 @@ define_error! {
                 format!("semantic config validation failed for option `gas_multiplier` of chain '{}', reason: gas multiplier ({}) is smaller than `1.1`, which could trigger gas fee errors in production", e.chain_id, e.gas_multiplier)
             },
 
-        SdkModuleVersion
+        CompatCheckFailed
             {
                 chain_id: ChainId,
                 address: String,
                 cause: String
             }
             |e| {
-                format!("Hermes health check failed while verifying the application compatibility for chain {0}:{1}; caused by: {2}",
+                format!("compatibility check failed for chain '{0}' at '{1}': {2}",
                     e.chain_id, e.address, e.cause)
             },
 
@@ -717,6 +717,14 @@ impl GrpcStatusSubdetail {
             Some((expected, got)) => expected < got,
         }
     }
+
+    /// Check whether this gRPC error message contains the string "invalid empty tx".
+    ///
+    /// ## Note
+    /// This error may happen for older chains that does not properly support simulation.
+    pub fn is_empty_tx_error(&self) -> bool {
+        self.status.message().contains("invalid empty tx")
+    }
 }
 
 /// Assumes that the cosmos-sdk account sequence mismatch error message, that may be seen
diff --git a/crates/relayer/src/event.rs b/crates/relayer/src/event.rs
index c4498389dd..adad3596d5 100644
--- a/crates/relayer/src/event.rs
+++ b/crates/relayer/src/event.rs
@@ -1,11 +1,18 @@
 use core::fmt::{Display, Error as FmtError, Formatter};
 use serde::Serialize;
 use std::str::FromStr;
+use subtle_encoding::hex;
 use tendermint::abci::Event as AbciEvent;
 
 use ibc_relayer_types::{
     applications::ics29_fee::events::{DistributeFeePacket, IncentivizedPacket},
     applications::ics31_icq::events::CrossChainQueryPacket,
+    core::ics02_client::{
+        error::Error as ClientError,
+        events::{self as client_events, Attributes as ClientAttributes, HEADER_ATTRIBUTE_KEY},
+        header::{decode_header, AnyHeader},
+        height::HeightErrorDetail,
+    },
     core::ics03_connection::{
         error::Error as ConnectionError,
         events::{self as connection_events, Attributes as ConnectionAttributes},
@@ -20,12 +27,6 @@ use ibc_relayer_types::{
         timeout::TimeoutHeight,
     },
     core::{
-        ics02_client::{
-            error::Error as ClientError,
-            events::{self as client_events, Attributes as ClientAttributes, HEADER_ATTRIBUTE_KEY},
-            header::{decode_header, AnyHeader},
-            height::HeightErrorDetail,
-        },
         ics04_channel::{channel::Ordering, packet::Sequence, version::Version},
         ics24_host::identifier::ConnectionId,
     },
@@ -402,8 +403,8 @@ fn client_extract_attributes_from_tx(event: &AbciEvent) -> Result<ClientAttribut
 pub fn extract_header_from_tx(event: &AbciEvent) -> Result<AnyHeader, ClientError> {
     for tag in &event.attributes {
         if tag.key == HEADER_ATTRIBUTE_KEY {
-            let header_bytes =
-                hex::decode(&tag.value).map_err(|_| ClientError::malformed_header())?;
+            let header_bytes = hex::decode(tag.value.to_lowercase())
+                .map_err(|_| ClientError::malformed_header())?;
             return decode_header(&header_bytes);
         }
     }
@@ -524,9 +525,11 @@ pub fn extract_packet_and_write_ack_from_tx(
 ) -> Result<(Packet, Vec<u8>), ChannelError> {
     let mut packet = Packet::default();
     let mut write_ack: Vec<u8> = Vec::new();
+
     for tag in &event.attributes {
         let key = tag.key.as_str();
         let value = tag.value.as_str();
+
         match key {
             channel_events::PKT_SRC_PORT_ATTRIBUTE_KEY => {
                 packet.source_port = value.parse().map_err(ChannelError::identifier)?;
@@ -553,7 +556,8 @@ pub fn extract_packet_and_write_ack_from_tx(
                 packet.timeout_timestamp = value.parse().unwrap();
             }
             channel_events::PKT_DATA_ATTRIBUTE_KEY => {
-                packet.data = Vec::from(value.as_bytes());
+                packet.data = hex::decode(value.to_lowercase())
+                    .map_err(|_| ChannelError::invalid_packet_data(value.to_string()))?;
             }
             channel_events::PKT_ACK_ATTRIBUTE_KEY => {
                 write_ack = Vec::from(value.as_bytes());
diff --git a/crates/relayer/src/event/source/websocket/extract.rs b/crates/relayer/src/event/source/websocket/extract.rs
index 66301ff192..30addd9653 100644
--- a/crates/relayer/src/event/source/websocket/extract.rs
+++ b/crates/relayer/src/event/source/websocket/extract.rs
@@ -321,7 +321,7 @@ fn extract_block_events(
     );
     append_events::<ChannelEvents::SendPacket>(
         &mut events,
-        extract_events(height, block_events, "send_packet", "packet_data"),
+        extract_events(height, block_events, "send_packet", "packet_data_hex"),
         height,
     );
     append_events::<ChannelEvents::CloseInit>(
diff --git a/crates/relayer/src/link/error.rs b/crates/relayer/src/link/error.rs
index adf8142ec8..694bc22f70 100644
--- a/crates/relayer/src/link/error.rs
+++ b/crates/relayer/src/link/error.rs
@@ -73,7 +73,7 @@ define_error! {
         Send
             { event: IbcEvent }
             |e| {
-                format!("chain error when sending messages: {0}", e.event)
+                format!("failed to send message: {0}", e.event)
             },
 
         MissingChannelId
diff --git a/crates/relayer/src/link/relay_path.rs b/crates/relayer/src/link/relay_path.rs
index b73ce1363e..2cbc3b85e7 100644
--- a/crates/relayer/src/link/relay_path.rs
+++ b/crates/relayer/src/link/relay_path.rs
@@ -429,7 +429,7 @@ impl<ChainA: ChainHandle, ChainB: ChainHandle> RelayPath<ChainA, ChainB> {
     fn relay_pending_packets(&self, height: Option<Height>) -> Result<(), LinkError> {
         let _span = span!(Level::ERROR, "relay_pending_packets", ?height).entered();
 
-        let tracking_id = TrackingId::new_cleared_uuid();
+        let tracking_id = TrackingId::new_packet_clearing();
         telemetry!(received_event_batch, tracking_id);
 
         let src_config = self.src_chain().config().map_err(LinkError::relayer)?;
@@ -712,12 +712,12 @@ impl<ChainA: ChainHandle, ChainB: ChainHandle> RelayPath<ChainA, ChainB> {
 
                     return Ok(reply);
                 }
-                Err(LinkError(error::LinkErrorDetail::Send(e), _)) => {
-                    // This error means we could retry
-                    error!("error {}", e.event);
+                Err(LinkError(error::LinkErrorDetail::Send(_), _)) => {
                     if i + 1 == MAX_RETRIES {
-                        error!("{}/{} retries exhausted. giving up", i + 1, MAX_RETRIES)
+                        error!("{}/{} retries exhausted, giving up", i + 1, MAX_RETRIES)
                     } else {
+                        debug!("{}/{} retries exhausted, retrying with newly-generated operational data", i + 1, MAX_RETRIES);
+
                         // If we haven't exhausted all retries, regenerate the op. data & retry
                         match self.regenerate_operational_data(odata.clone()) {
                             None => return Ok(S::Reply::empty()), // Nothing to retry
diff --git a/crates/relayer/src/link/relay_sender.rs b/crates/relayer/src/link/relay_sender.rs
index c4d29fe91a..a8c70cb9f0 100644
--- a/crates/relayer/src/link/relay_sender.rs
+++ b/crates/relayer/src/link/relay_sender.rs
@@ -95,10 +95,11 @@ impl Submit for AsyncSender {
     type Reply = AsyncReply;
 
     fn submit(target: &impl ChainHandle, msgs: TrackedMsgs) -> Result<Self::Reply, LinkError> {
-        let a = target
+        let responses = target
             .send_messages_and_wait_check_tx(msgs)
             .map_err(LinkError::relayer)?;
-        let reply = AsyncReply { responses: a };
+
+        let reply = AsyncReply { responses };
 
         // Note: There may be errors in the reply, for example:
         // `Response { code: Err(11), data: Data([]), log: Log("Too much gas wanted: 35000000, maximum is 25000000: out of gas")`
diff --git a/crates/relayer/src/upgrade_chain.rs b/crates/relayer/src/upgrade_chain.rs
index 3c6b407f5c..81ec1bc579 100644
--- a/crates/relayer/src/upgrade_chain.rs
+++ b/crates/relayer/src/upgrade_chain.rs
@@ -17,6 +17,7 @@ use ibc_relayer_types::clients::ics07_tendermint::client_state::UpgradeOptions;
 use ibc_relayer_types::core::ics02_client::client_state::ClientState;
 use ibc_relayer_types::core::ics24_host::identifier::{ChainId, ClientId};
 use ibc_relayer_types::{downcast, Height};
+use tracing::warn;
 
 use crate::chain::handle::ChainHandle;
 use crate::chain::requests::{IncludeProof, QueryClientStateRequest, QueryHeight};
@@ -96,22 +97,32 @@ pub fn build_and_send_ibc_upgrade_proposal(
 /// Looks at the ibc-go version to determine if the legacy `UpgradeProposal` message
 /// or if the newer `MsgIBCSoftwareUpdate` message should be used to upgrade the chain.
 /// If the ibc-go version returned isn't reliable, a deprecated version, then the version
-/// of Cosmos SDK is used.
+/// of Cosmos SDK is used, if any. If there is no SDK version, we assume that the legacy upgrade is required.
 pub fn requires_legacy_upgrade_proposal(dst_chain: impl ChainHandle) -> bool {
-    let version_specs = dst_chain.version_specs().unwrap();
+    let Ok(version_specs) = dst_chain.version_specs() else {
+        warn!("failed to get version specs, assuming legacy upgrade proposal is required");
+        return true;
+    };
+
+    let sdk_before_50 = version_specs
+        .cosmos_sdk
+        .as_ref()
+        .map(|s| s.minor < 50)
+        .unwrap_or(true);
+
     match version_specs.ibc_go {
+        None => sdk_before_50,
         Some(ibc_version) => {
             // Some ibc-go simapps return unreliable ibc-go versions, such as simapp v8.0.0
             // returns version v1.0.0. So if the ibc-go version matches which is not maintained
             // anymore, use the Cosmos SDK version to determine if the legacy upgrade proposal
             // has to be used
             if ibc_version.major < 4 {
-                version_specs.cosmos_sdk.minor < 50
+                sdk_before_50
             } else {
                 ibc_version.major < 8
             }
         }
-        None => version_specs.cosmos_sdk.minor < 50,
     }
 }
 
diff --git a/crates/relayer/src/util/profiling.rs b/crates/relayer/src/util/profiling.rs
index c6310f95fc..a6371e53fe 100644
--- a/crates/relayer/src/util/profiling.rs
+++ b/crates/relayer/src/util/profiling.rs
@@ -98,7 +98,6 @@ impl Drop for Timer {
 
 pub fn open_or_create_profile_file(file_name: &Path) {
     let file = OpenOptions::new()
-        .write(true)
         .append(true)
         .create(true)
         .open(file_name)
diff --git a/crates/relayer/src/worker.rs b/crates/relayer/src/worker.rs
index 400ff811af..40f73b67de 100644
--- a/crates/relayer/src/worker.rs
+++ b/crates/relayer/src/worker.rs
@@ -128,7 +128,7 @@ pub fn spawn_worker_tasks<ChainA: ChainHandle, ChainB: ChainHandle>(
                 Ok(link) => {
                     let channel_ordering = link.a_to_b.channel().ordering;
                     let should_clear_on_start =
-                        packets_config.clear_on_start || channel_ordering == Ordering::Ordered;
+                        should_clear_on_start(&packets_config, channel_ordering);
 
                     let (cmd_tx, cmd_rx) = crossbeam_channel::unbounded();
                     let link = Arc::new(Mutex::new(link));
@@ -217,3 +217,11 @@ pub fn spawn_worker_tasks<ChainA: ChainHandle, ChainB: ChainHandle>(
 
     WorkerHandle::new(id, object, data, cmd_tx, task_handles)
 }
+
+fn should_clear_on_start(config: &crate::config::Packets, channel_ordering: Ordering) -> bool {
+    if config.force_disable_clear_on_start {
+        false
+    } else {
+        config.clear_on_start || channel_ordering == Ordering::Ordered
+    }
+}
diff --git a/crates/relayer/src/worker/packet.rs b/crates/relayer/src/worker/packet.rs
index 2eb85f633c..5daf122466 100644
--- a/crates/relayer/src/worker/packet.rs
+++ b/crates/relayer/src/worker/packet.rs
@@ -17,14 +17,17 @@ use ibc_proto::ibc::apps::fee::v1::{IdentifiedPacketFees, QueryIncentivizedPacke
 use ibc_proto::ibc::core::channel::v1::PacketId;
 use ibc_relayer_types::applications::ics29_fee::events::IncentivizedPacket;
 use ibc_relayer_types::applications::transfer::{Amount, Coin, RawCoin};
+use ibc_relayer_types::core::ics04_channel::channel::Ordering;
 use ibc_relayer_types::core::ics04_channel::events::WriteAcknowledgement;
 use ibc_relayer_types::core::ics04_channel::packet::Sequence;
 use ibc_relayer_types::events::{IbcEvent, IbcEventType};
 use ibc_relayer_types::Height;
 
 use crate::chain::handle::ChainHandle;
+use crate::chain::requests::QueryHeight;
 use crate::config::filter::FeePolicy;
 use crate::event::source::EventBatch;
+use crate::event::IbcEventWithHeight;
 use crate::foreign_client::HasExpiredOrFrozenError;
 use crate::link::Resubmit;
 use crate::link::{error::LinkError, Link};
@@ -204,6 +207,24 @@ fn handle_packet_cmd<ChainA: ChainHandle, ChainB: ChainHandle>(
 ) -> Result<(), TaskError<RunError>> {
     // Handle packet clearing which is triggered from a command
     let (do_clear, maybe_height) = match &cmd {
+        WorkerCmd::IbcEvents { batch } if link.a_to_b.channel().ordering == Ordering::Ordered => {
+            let lowest_sequence = lowest_sequence(&batch.events);
+
+            let next_sequence = query_next_sequence_receive(
+                link.a_to_b.dst_chain(),
+                link.a_to_b.dst_port_id(),
+                link.a_to_b.dst_channel_id(),
+                QueryHeight::Specific(batch.height),
+            )
+            .ok();
+
+            if *should_clear_on_start || next_sequence < lowest_sequence {
+                (true, Some(batch.height))
+            } else {
+                (false, None)
+            }
+        }
+
         WorkerCmd::IbcEvents { batch } => {
             if *should_clear_on_start {
                 (true, Some(batch.height))
@@ -439,6 +460,34 @@ fn handle_execute_schedule<ChainA: ChainHandle, ChainB: ChainHandle>(
     Ok(())
 }
 
+fn query_next_sequence_receive<Chain: ChainHandle>(
+    chain: &Chain,
+    port_id: &PortId,
+    channel_id: &ChannelId,
+    height: QueryHeight,
+) -> Result<Sequence, LinkError> {
+    use crate::chain::requests::{IncludeProof, QueryNextSequenceReceiveRequest};
+
+    chain
+        .query_next_sequence_receive(
+            QueryNextSequenceReceiveRequest {
+                port_id: port_id.clone(),
+                channel_id: channel_id.clone(),
+                height,
+            },
+            IncludeProof::No,
+        )
+        .map(|(seq, _height)| seq)
+        .map_err(|e| LinkError::query(chain.id(), e))
+}
+
+fn lowest_sequence(events: &[IbcEventWithHeight]) -> Option<Sequence> {
+    events
+        .iter()
+        .flat_map(|event| event.event.packet().map(|p| p.sequence))
+        .min()
+}
+
 #[cfg(feature = "telemetry")]
 use crate::link::RelaySummary;
 
diff --git a/crates/telemetry/Cargo.toml b/crates/telemetry/Cargo.toml
index 60d3357d71..16706aea52 100644
--- a/crates/telemetry/Cargo.toml
+++ b/crates/telemetry/Cargo.toml
@@ -19,7 +19,7 @@ once_cell                = "1.19.0"
 opentelemetry            = { version = "0.19.0", features = ["metrics"] }
 opentelemetry-prometheus = "0.12.0"
 prometheus               = "0.13.2"
-moka                     = { version = "0.12.0", features = ["sync"] }
+moka                     = { version = "0.12.5", features = ["sync"] }
 dashmap                  = "5.4.0"
 serde_json               = "1.0.111"
 serde                    = "1.0.195"
diff --git a/crates/telemetry/src/state.rs b/crates/telemetry/src/state.rs
index bf48381d1f..465a367044 100644
--- a/crates/telemetry/src/state.rs
+++ b/crates/telemetry/src/state.rs
@@ -201,6 +201,9 @@ pub struct TelemetryState {
     /// Number of errors observed by Hermes when broadcasting a Tx
     broadcast_errors: Counter<u64>,
 
+    /// Number of errors observed by Hermes when simulating a Tx
+    simulate_errors: Counter<u64>,
+
     /// The EIP-1559 base fee queried
     dynamic_gas_queried_fees: ObservableGauge<f64>,
 
@@ -394,6 +397,13 @@ impl TelemetryState {
                 )
                 .init(),
 
+            simulate_errors: meter
+                .u64_counter("simulate_errors")
+                .with_description(
+                    "Number of errors observed by Hermes when simulating a Tx",
+                )
+                .init(),
+
             dynamic_gas_queried_fees: meter
                 .f64_observable_gauge("dynamic_gas_queried_fees")
                 .with_description("The EIP-1559 base fee queried")
@@ -1160,6 +1170,20 @@ impl TelemetryState {
         self.broadcast_errors.add(&cx, 1, labels);
     }
 
+    /// Add an error and its description to the list of errors observed after simulating
+    /// a Tx with a specific account.
+    pub fn simulate_errors(&self, address: &String, recoverable: bool, error_description: String) {
+        let cx = Context::current();
+
+        let labels = &[
+            KeyValue::new("account", address.to_string()),
+            KeyValue::new("recoverable", recoverable.to_string()),
+            KeyValue::new("error_description", error_description.to_owned()),
+        ];
+
+        self.simulate_errors.add(&cx, 1, labels);
+    }
+
     pub fn dynamic_gas_queried_fees(&self, chain_id: &ChainId, amount: f64) {
         let cx = Context::current();
 
diff --git a/guide/src/documentation/telemetry/operators.md b/guide/src/documentation/telemetry/operators.md
index 2496b6e91a..dd0d137d2e 100644
--- a/guide/src/documentation/telemetry/operators.md
+++ b/guide/src/documentation/telemetry/operators.md
@@ -142,6 +142,7 @@ If this metric is increasing, it signals that the packet queue is increasing and
 | `cleared_send_packet_count_total`    | Number of SendPacket events received during the initial and periodic clearing, per chain, counterparty chain, channel and port                                              | `u64` Counter       | Packet workers enabled, and periodic packet clearing or clear on start enabled |
 | `cleared_acknowledgment_count_total` | Number of WriteAcknowledgement events received during the initial and periodic clearing, per chain, counterparty chain, channel and port                                    | `u64` Counter       | Packet workers enabled, and periodic packet clearing or clear on start enabled |
 | `broadcast_errors_total`        | Number of errors observed by Hermes when broadcasting a Tx, per error type and account                                                                                                         | `u64` Counter       | Packet workers enabled |
+| `simulate_errors_total`        | Number of errors observed by Hermes when simulating a Tx, per error type, account and whether the error is recoverable or not                                 | `u64` Counter       | Packet workers enabled |
 | `filtered_packets`        | Number of ICS-20 packets filtered because the memo and/or the receiver fields were exceeding the configured limits | `u64` Counter | Packet workers enabled, and `ics20_max_memo_size` and/or `ics20_max_receiver_size` enabled |
 
 Notes:
diff --git a/tools/integration-test/Cargo.toml b/tools/integration-test/Cargo.toml
index b6bf34be3e..ff9d416b45 100644
--- a/tools/integration-test/Cargo.toml
+++ b/tools/integration-test/Cargo.toml
@@ -50,7 +50,7 @@ name = "test_setup_with_binary_channel"
 doc = true
 
 [dev-dependencies]
-tempfile = "3.6.0"
+tempfile = "3.10.1"
 
 [dependencies.tendermint]
 version = "0.34.0"
diff --git a/tools/integration-test/src/tests/ica.rs b/tools/integration-test/src/tests/ica.rs
index 03d367b675..024e82a4d9 100644
--- a/tools/integration-test/src/tests/ica.rs
+++ b/tools/integration-test/src/tests/ica.rs
@@ -2,13 +2,10 @@ use std::collections::HashMap;
 use std::str::FromStr;
 
 use ibc_relayer::chain::handle::ChainHandle;
-use ibc_relayer::chain::tracking::TrackedMsgs;
 use ibc_relayer::config::{
     filter::{ChannelFilters, ChannelPolicy, FilterPattern},
     ChainConfig, PacketFilter,
 };
-use ibc_relayer::event::IbcEventWithHeight;
-use ibc_relayer_types::applications::ics27_ica::msgs::send_tx::MsgSendTx;
 use ibc_relayer_types::applications::ics27_ica::packet_data::InterchainAccountPacketData;
 use ibc_relayer_types::applications::{
     ics27_ica::cosmos_tx::CosmosTx,
@@ -26,6 +23,7 @@ use ibc_test_framework::prelude::*;
 use ibc_test_framework::relayer::channel::{
     assert_eventually_channel_closed, assert_eventually_channel_established, query_channel_end,
 };
+use ibc_test_framework::util::interchain_security::interchain_send_tx;
 
 #[test]
 fn test_ica_filter_default() -> Result<(), Error> {
@@ -187,6 +185,7 @@ impl BinaryConnectionTest for IcaFilterTestAllow {
         Ok(())
     }
 }
+
 pub struct IcaFilterTestDeny;
 
 impl TestOverrides for IcaFilterTestDeny {
@@ -373,26 +372,3 @@ impl BinaryConnectionTest for ICACloseChannelTest {
         })
     }
 }
-
-fn interchain_send_tx<ChainA: ChainHandle>(
-    chain: &ChainA,
-    from: &Signer,
-    connection: &ConnectionId,
-    msg: InterchainAccountPacketData,
-    relative_timeout: Timestamp,
-) -> Result<Vec<IbcEventWithHeight>, Error> {
-    let msg = MsgSendTx {
-        owner: from.clone(),
-        connection_id: connection.clone(),
-        packet_data: msg,
-        relative_timeout,
-    };
-
-    let msg_any = msg.to_any();
-
-    let tm = TrackedMsgs::new_static(vec![msg_any], "SendTx");
-
-    chain
-        .send_messages_and_wait_commit(tm)
-        .map_err(Error::relayer)
-}
diff --git a/tools/integration-test/src/tests/interchain_security/ica_ordered_channel.rs b/tools/integration-test/src/tests/interchain_security/ica_ordered_channel.rs
new file mode 100644
index 0000000000..56a0075ff3
--- /dev/null
+++ b/tools/integration-test/src/tests/interchain_security/ica_ordered_channel.rs
@@ -0,0 +1,226 @@
+//! Verifies the behaviour of ordered channels with Interchain Accounts.
+//!
+//! In order to ensure that ordered channels correctly clear packets on ICA
+//! channels, this test sends some sequential packets with the supervisor enabled,
+//! sends the next packet *without* the supervisor enabled, then sends additional
+//! packets with the supervisor enabled again. The pending packet that was sent
+//! without the supervisor enabled should be relayed in order along with the
+//! other packets, as expected of ordered channel behaviour.
+
+use std::str::FromStr;
+
+use ibc_relayer_types::applications::ics27_ica::cosmos_tx::CosmosTx;
+use ibc_relayer_types::applications::ics27_ica::packet_data::InterchainAccountPacketData;
+use ibc_relayer_types::applications::transfer::msgs::send::MsgSend;
+use ibc_relayer_types::applications::transfer::{Amount, Coin};
+use ibc_relayer_types::bigint::U256;
+use ibc_relayer_types::signer::Signer;
+use ibc_relayer_types::timestamp::Timestamp;
+use ibc_relayer_types::tx_msg::Msg;
+use ibc_test_framework::chain::ext::ica::register_interchain_account;
+use ibc_test_framework::framework::binary::channel::run_binary_interchain_security_channel_test;
+use ibc_test_framework::prelude::*;
+use ibc_test_framework::relayer::channel::assert_eventually_channel_established;
+use ibc_test_framework::relayer::channel::query_channel_end;
+use ibc_test_framework::util::interchain_security::{
+    interchain_send_tx, update_genesis_for_consumer_chain, update_relayer_config_for_consumer_chain,
+};
+
+#[test]
+fn test_ica_ordered_channel() -> Result<(), Error> {
+    run_binary_interchain_security_channel_test(&IcaOrderedChannelTest)
+}
+
+struct IcaOrderedChannelTest;
+
+impl TestOverrides for IcaOrderedChannelTest {
+    fn modify_genesis_file(&self, genesis: &mut serde_json::Value) -> Result<(), Error> {
+        use serde_json::Value;
+
+        // Allow MsgSend messages over ICA
+        let allow_messages = genesis
+            .get_mut("app_state")
+            .and_then(|app_state| app_state.get_mut("interchainaccounts"))
+            .and_then(|ica| ica.get_mut("host_genesis_state"))
+            .and_then(|state| state.get_mut("params"))
+            .and_then(|params| params.get_mut("allow_messages"))
+            .and_then(|allow_messages| allow_messages.as_array_mut());
+
+        if let Some(allow_messages) = allow_messages {
+            allow_messages.push(Value::String("/cosmos.bank.v1beta1.MsgSend".to_string()));
+        } else {
+            return Err(Error::generic(eyre!("failed to update genesis file")));
+        }
+
+        update_genesis_for_consumer_chain(genesis)?;
+
+        Ok(())
+    }
+
+    fn modify_relayer_config(&self, config: &mut Config) {
+        config.mode.clients.misbehaviour = false;
+
+        config.mode.channels.enabled = true;
+
+        // Disable packet clearing so that packets sent without the supervisor
+        // enabled enter a pending state.
+        config.mode.packets.enabled = true;
+        config.mode.packets.clear_on_start = false;
+        config.mode.packets.clear_interval = 0;
+        // This is needed for ordered channels
+        config.mode.packets.force_disable_clear_on_start = true;
+
+        update_relayer_config_for_consumer_chain(config);
+    }
+
+    fn should_spawn_supervisor(&self) -> bool {
+        false
+    }
+}
+
+impl BinaryChannelTest for IcaOrderedChannelTest {
+    fn run<ChainA: ChainHandle, ChainB: ChainHandle>(
+        &self,
+        _config: &TestConfig,
+        relayer: RelayerDriver,
+        chains: ConnectedChains<ChainA, ChainB>,
+        channel: ConnectedChannel<ChainA, ChainB>,
+    ) -> Result<(), Error> {
+        let connection_b_to_a = channel.connection.clone().flip();
+        let (wallet, channel_id, port_id) =
+            register_interchain_account(&chains.node_b, chains.handle_b(), &connection_b_to_a)?;
+
+        relayer.with_supervisor(|| {
+            // Check that the corresponding ICA channel is eventually established.
+            let _counterparty_channel_id = assert_eventually_channel_established(
+                chains.handle_b(),
+                chains.handle_a(),
+                &channel_id.as_ref(),
+                &port_id.as_ref(),
+            )?;
+
+            Ok(())
+        })?;
+
+        // Assert that the channel returned by `register_interchain_account` is an ordered channel
+        let channel_end =
+            query_channel_end(chains.handle_b(), &channel_id.as_ref(), &port_id.as_ref())?;
+
+        assert_eq!(channel_end.value().ordering(), &Ordering::Ordered);
+
+        // Query the controller chain for the address of the ICA wallet on the host chain.
+        let ica_address = chains.node_b.chain_driver().query_interchain_account(
+            &wallet.address(),
+            &channel.connection.connection_id_b.as_ref(),
+        )?;
+
+        let stake_denom: MonoTagged<ChainA, Denom> = MonoTagged::new(Denom::base("stake"));
+
+        chains.node_a.chain_driver().assert_eventual_wallet_amount(
+            &ica_address.as_ref(),
+            &stake_denom.with_amount(0u64).as_ref(),
+        )?;
+
+        // Send funds to the interchain account.
+        let ica_fund = 42000u64;
+
+        chains.node_a.chain_driver().local_transfer_token(
+            &chains.node_a.wallets().user1(),
+            &ica_address.as_ref(),
+            &stake_denom.with_amount(ica_fund).as_ref(),
+        )?;
+
+        chains.node_a.chain_driver().assert_eventual_wallet_amount(
+            &ica_address.as_ref(),
+            &stake_denom.with_amount(ica_fund).as_ref(),
+        )?;
+
+        let amount = 1200;
+
+        let msg = MsgSend {
+            from_address: ica_address.to_string(),
+            to_address: chains.node_a.wallets().user2().address().to_string(),
+            amount: vec![Coin {
+                denom: stake_denom.to_string(),
+                amount: Amount(U256::from(amount)),
+            }],
+        };
+
+        let raw_msg = msg.to_any();
+
+        let cosmos_tx = CosmosTx {
+            messages: vec![raw_msg],
+        };
+
+        let raw_cosmos_tx = cosmos_tx.to_any();
+
+        let interchain_account_packet_data = InterchainAccountPacketData::new(raw_cosmos_tx.value);
+
+        let signer = Signer::from_str(&wallet.address().to_string()).unwrap();
+
+        let user2_balance = chains.node_a.chain_driver().query_balance(
+            &chains.node_a.wallets().user2().address(),
+            &stake_denom.as_ref(),
+        )?;
+
+        relayer.with_supervisor(|| {
+            let ica_events = interchain_send_tx(
+                chains.handle_b(),
+                &signer,
+                &channel.connection.connection_id_b.0,
+                interchain_account_packet_data.clone(),
+                Timestamp::from_nanoseconds(120000000000).unwrap(),
+            )?;
+
+            // Check that the ICA account's balance has been debited the sent amount.
+            chains.node_a.chain_driver().assert_eventual_wallet_amount(
+                &ica_address.as_ref(),
+                &stake_denom.with_amount(ica_fund - amount).as_ref(),
+            )?;
+
+            chains.node_a.chain_driver().assert_eventual_wallet_amount(
+                &chains.node_a.wallets().user2().address(),
+                &(user2_balance.clone() + amount).as_ref(),
+            )?;
+
+            info!("First ICA transfer made with supervisor: {ica_events:#?}");
+
+            Ok(())
+        })?;
+
+        let ica_events = interchain_send_tx(
+            chains.handle_b(),
+            &signer,
+            &channel.connection.connection_id_b.0,
+            interchain_account_packet_data.clone(),
+            Timestamp::from_nanoseconds(120000000000).unwrap(),
+        )?;
+
+        info!("Second ICA transfer made without supervisor: {ica_events:#?}");
+
+        relayer.with_supervisor(|| {
+            let ica_events = interchain_send_tx(
+                chains.handle_b(),
+                &signer,
+                &channel.connection.connection_id_b.0,
+                interchain_account_packet_data,
+                Timestamp::from_nanoseconds(120000000000).unwrap(),
+            )?;
+
+            // Check that the ICA account's balance has been debited the sent amount.
+            chains.node_a.chain_driver().assert_eventual_wallet_amount(
+                &ica_address.as_ref(),
+                &stake_denom.with_amount(ica_fund - 3 * amount).as_ref(),
+            )?;
+
+            info!("Third ICA transfer made with supervisor: {ica_events:#?}");
+
+            chains.node_a.chain_driver().assert_eventual_wallet_amount(
+                &chains.node_a.wallets().user2().address(),
+                &(user2_balance + (3 * amount)).as_ref(),
+            )?;
+
+            Ok(())
+        })
+    }
+}
diff --git a/tools/integration-test/src/tests/interchain_security/ica_transfer.rs b/tools/integration-test/src/tests/interchain_security/ica_transfer.rs
index fc44ff7fd2..5377f206da 100644
--- a/tools/integration-test/src/tests/interchain_security/ica_transfer.rs
+++ b/tools/integration-test/src/tests/interchain_security/ica_transfer.rs
@@ -3,10 +3,7 @@
 //! the second chain a Consumer chain.
 use std::str::FromStr;
 
-use ibc_relayer::chain::tracking::TrackedMsgs;
-use ibc_relayer::event::IbcEventWithHeight;
 use ibc_relayer_types::applications::ics27_ica::cosmos_tx::CosmosTx;
-use ibc_relayer_types::applications::ics27_ica::msgs::send_tx::MsgSendTx;
 use ibc_relayer_types::applications::ics27_ica::packet_data::InterchainAccountPacketData;
 use ibc_relayer_types::applications::transfer::msgs::send::MsgSend;
 use ibc_relayer_types::applications::transfer::{Amount, Coin};
@@ -19,7 +16,7 @@ use ibc_test_framework::framework::binary::channel::run_binary_interchain_securi
 use ibc_test_framework::prelude::*;
 use ibc_test_framework::relayer::channel::assert_eventually_channel_established;
 use ibc_test_framework::util::interchain_security::{
-    update_genesis_for_consumer_chain, update_relayer_config_for_consumer_chain,
+    interchain_send_tx, update_genesis_for_consumer_chain, update_relayer_config_for_consumer_chain,
 };
 
 #[test]
@@ -151,29 +148,7 @@ impl BinaryChannelTest for InterchainSecurityIcaTransferTest {
             &ica_address.as_ref(),
             &stake_denom.with_amount(ica_fund - amount).as_ref(),
         )?;
+
         Ok(())
     }
 }
-
-fn interchain_send_tx<ChainA: ChainHandle>(
-    chain: &ChainA,
-    from: &Signer,
-    connection: &ConnectionId,
-    msg: InterchainAccountPacketData,
-    relative_timeout: Timestamp,
-) -> Result<Vec<IbcEventWithHeight>, Error> {
-    let msg = MsgSendTx {
-        owner: from.clone(),
-        connection_id: connection.clone(),
-        packet_data: msg,
-        relative_timeout,
-    };
-
-    let msg_any = msg.to_any();
-
-    let tm = TrackedMsgs::new_static(vec![msg_any], "SendTx");
-
-    chain
-        .send_messages_and_wait_commit(tm)
-        .map_err(Error::relayer)
-}
diff --git a/tools/integration-test/src/tests/interchain_security/mod.rs b/tools/integration-test/src/tests/interchain_security/mod.rs
index a2acc74d92..0772d733db 100644
--- a/tools/integration-test/src/tests/interchain_security/mod.rs
+++ b/tools/integration-test/src/tests/interchain_security/mod.rs
@@ -1,4 +1,6 @@
 #[cfg(any(doc, feature = "ica"))]
+pub mod ica_ordered_channel;
+#[cfg(any(doc, feature = "ica"))]
 pub mod ica_transfer;
 #[cfg(any(doc, feature = "ics31"))]
 pub mod icq;
diff --git a/tools/integration-test/src/tests/memo.rs b/tools/integration-test/src/tests/memo.rs
index 2b44b90d48..52de0c5602 100644
--- a/tools/integration-test/src/tests/memo.rs
+++ b/tools/integration-test/src/tests/memo.rs
@@ -12,6 +12,8 @@ use ibc_test_framework::ibc::denom::derive_ibc_denom;
 use ibc_test_framework::prelude::*;
 use ibc_test_framework::util::random::{random_string, random_u128_range};
 
+const OVERWRITE_MEMO: &str = "Overwritten memo";
+
 #[test]
 fn test_memo() -> Result<(), Error> {
     let memo = Memo::new(random_string()).unwrap();
@@ -19,6 +21,13 @@ fn test_memo() -> Result<(), Error> {
     run_binary_channel_test(&test)
 }
 
+#[test]
+fn test_memo_overwrite() -> Result<(), Error> {
+    let memo = Memo::new(random_string()).unwrap();
+    let test = MemoTest { memo };
+    run_binary_channel_test(&test)
+}
+
 pub struct MemoTest {
     memo: Memo,
 }
@@ -82,6 +91,70 @@ impl BinaryChannelTest for MemoTest {
     }
 }
 
+pub struct MemoOverwriteTest {
+    memo: Memo,
+}
+
+impl TestOverrides for MemoOverwriteTest {
+    fn modify_relayer_config(&self, config: &mut Config) {
+        for chain in config.chains.iter_mut() {
+            match chain {
+                ChainConfig::CosmosSdk(chain_config) => {
+                    chain_config.memo_prefix = self.memo.clone();
+                    chain_config.memo_overwrite = Some(Memo::new(OVERWRITE_MEMO).unwrap())
+                }
+            }
+        }
+    }
+}
+
+impl BinaryChannelTest for MemoOverwriteTest {
+    fn run<ChainA: ChainHandle, ChainB: ChainHandle>(
+        &self,
+        _config: &TestConfig,
+        _relayer: RelayerDriver,
+        chains: ConnectedChains<ChainA, ChainB>,
+        channel: ConnectedChannel<ChainA, ChainB>,
+    ) -> Result<(), Error> {
+        info!(
+            "testing IBC transfer with memo configured: \"{}\"",
+            self.memo
+        );
+
+        let denom_a = chains.node_a.denom();
+
+        let a_to_b_amount = random_u128_range(1000, 5000);
+
+        chains.node_a.chain_driver().ibc_transfer_token(
+            &channel.port_a.as_ref(),
+            &channel.channel_id_a.as_ref(),
+            &chains.node_a.wallets().user1(),
+            &chains.node_b.wallets().user1().address(),
+            &denom_a.with_amount(a_to_b_amount).as_ref(),
+        )?;
+
+        let denom_b = derive_ibc_denom(
+            &channel.port_b.as_ref(),
+            &channel.channel_id_b.as_ref(),
+            &denom_a,
+        )?;
+
+        chains.node_b.chain_driver().assert_eventual_wallet_amount(
+            &chains.node_b.wallets().user1().address(),
+            &denom_b.with_amount(a_to_b_amount).as_ref(),
+        )?;
+
+        let tx_info = chains
+            .node_b
+            .chain_driver()
+            .query_recipient_transactions(&chains.node_b.wallets().user1().address())?;
+
+        assert_tx_memo_equals(&tx_info, OVERWRITE_MEMO)?;
+
+        Ok(())
+    }
+}
+
 fn assert_tx_memo_equals(tx_info: &json::Value, expected_memo: &str) -> Result<(), Error> {
     debug!("comparing memo field from json value {}", tx_info);
 
diff --git a/tools/test-framework/Cargo.toml b/tools/test-framework/Cargo.toml
index a33bbf74d4..21616613ca 100644
--- a/tools/test-framework/Cargo.toml
+++ b/tools/test-framework/Cargo.toml
@@ -17,14 +17,14 @@ description = """
 ibc-relayer-types = { version = "=0.27.0",     path = "../../crates/relayer-types" }
 ibc-relayer       = { version = "=0.27.0",     path = "../../crates/relayer" }
 ibc-relayer-cli   = { version = "=1.8.0",      path = "../../crates/relayer-cli" }
-ibc-proto         = { version = "0.41.0", features = ["serde"] }
+ibc-proto         = { version = "0.42.0", features = ["serde"] }
 tendermint-rpc    = { version = "0.34.0", features = ["http-client", "websocket-client"] }
 
 http = "0.2.9"
 tokio = { version = "1.0", features = ["full"] }
 tracing = "0.1.36"
 tracing-subscriber = "0.3.14"
-eyre = "0.6.8"
+eyre = "0.6.12"
 color-eyre = "0.6"
 rand = "0.8.5"
 hex = "0.4.3"
diff --git a/tools/test-framework/src/chain/ext/ica.rs b/tools/test-framework/src/chain/ext/ica.rs
index 766f03e1e1..bd5b142fd2 100644
--- a/tools/test-framework/src/chain/ext/ica.rs
+++ b/tools/test-framework/src/chain/ext/ica.rs
@@ -1,6 +1,6 @@
 use ibc_relayer::chain::handle::ChainHandle;
 use ibc_relayer::chain::tracking::TrackedMsgs;
-use ibc_relayer_types::applications::ics27_ica::msgs::register::MsgRegisterInterchainAccount;
+use ibc_relayer_types::applications::ics27_ica::msgs::register::LegacyMsgRegisterInterchainAccount;
 use ibc_relayer_types::core::ics04_channel::version::Version;
 use ibc_relayer_types::events::IbcEvent;
 use ibc_relayer_types::tx_msg::Msg;
@@ -80,7 +80,7 @@ pub fn register_interchain_account<Chain: ChainHandle, Counterparty: ChainHandle
     let owner = handle.get_signer()?;
 
     let version_str = format!("{{\"version\":\"ics27-1\",\"encoding\":\"proto3\",\"tx_type\":\"sdk_multi_msg\",\"controller_connection_id\":\"{}\",\"host_connection_id\":\"{}\"}}", connection.connection_id_a.0, connection.connection_id_b.0);
-    let msg = MsgRegisterInterchainAccount {
+    let msg = LegacyMsgRegisterInterchainAccount {
         owner,
         connection_id: connection.connection_id_a.0.clone(),
         version: Version::new(version_str),
diff --git a/tools/test-framework/src/types/single/node.rs b/tools/test-framework/src/types/single/node.rs
index 9d4e7ea280..c898322da0 100644
--- a/tools/test-framework/src/types/single/node.rs
+++ b/tools/test-framework/src/types/single/node.rs
@@ -191,6 +191,7 @@ impl FullNode {
             packet_filter: Default::default(),
             address_type: chain_type.address_type(),
             memo_prefix: Default::default(),
+            memo_overwrite: None,
             proof_specs: Default::default(),
             extension_options: Default::default(),
             sequential_batch_tx: false,
diff --git a/tools/test-framework/src/util/interchain_security.rs b/tools/test-framework/src/util/interchain_security.rs
index 035efb3c84..ea66e12f4f 100644
--- a/tools/test-framework/src/util/interchain_security.rs
+++ b/tools/test-framework/src/util/interchain_security.rs
@@ -1,8 +1,15 @@
-use ibc_relayer::config::ChainConfig;
-
 use crate::chain::config::set_voting_period;
 use crate::prelude::*;
 
+use ibc_relayer::chain::tracking::TrackedMsgs;
+use ibc_relayer::config::ChainConfig;
+use ibc_relayer::event::IbcEventWithHeight;
+use ibc_relayer_types::applications::ics27_ica::msgs::send_tx::MsgSendTx;
+use ibc_relayer_types::applications::ics27_ica::packet_data::InterchainAccountPacketData;
+use ibc_relayer_types::signer::Signer;
+use ibc_relayer_types::timestamp::Timestamp;
+use ibc_relayer_types::tx_msg::Msg;
+
 pub fn update_genesis_for_consumer_chain(genesis: &mut serde_json::Value) -> Result<(), Error> {
     // Consumer chain doesn't have a gov key.
     if genesis
@@ -32,3 +39,28 @@ pub fn update_relayer_config_for_consumer_chain(config: &mut Config) {
         }
     }
 }
+
+/// Sends a message containing `InterchainAccountPacketData` from the `Signer`
+/// to the `Chain`.
+pub fn interchain_send_tx<ChainA: ChainHandle>(
+    chain: &ChainA,
+    from: &Signer,
+    connection: &ConnectionId,
+    msg: InterchainAccountPacketData,
+    relative_timeout: Timestamp,
+) -> Result<Vec<IbcEventWithHeight>, Error> {
+    let msg = MsgSendTx {
+        owner: from.clone(),
+        connection_id: connection.clone(),
+        packet_data: msg,
+        relative_timeout,
+    };
+
+    let msg_any = msg.to_any();
+
+    let tm = TrackedMsgs::new_static(vec![msg_any], "SendTx");
+
+    chain
+        .send_messages_and_wait_commit(tm)
+        .map_err(Error::relayer)
+}