Bump monorepo dependency to latest protocol-23 branch (#362)

* Bump image version to current futurenet
* Fetch protocol-23 branch of monorepo

It is known and intentional that the Go XDR is different than
the Rust XDR (check-dependencies failing), because the Rust
side (simulation et al.) is not ready yet, but we need RPC to 
not break on the new meta format.

* Stop running P21 tests because checks fail:
The stellar-core binary is 22.x.x but it supports Protocol 23, 
meaning version validation fails because 22 (core version) < 
23 (minProtocolVersionSupported in the monorepo).

This is a temporary pause. Once P23 is ready we will have 
P22 and P23 runs instead of P21 and 22, anyway.

.github/workflows/stellar-rpc.yml

@@ -98,16 +98,15 @@ jobs:
     strategy:
       matrix:
         os: [ ubuntu-20.04, ubuntu-22.04 ]
-        protocol-version: [ 21, 22 ]
+        protocol-version: [ 22 ]
     runs-on: ${{ matrix.os }}
     env:
       STELLAR_RPC_INTEGRATION_TESTS_ENABLED: true
       STELLAR_RPC_INTEGRATION_TESTS_CORE_MAX_SUPPORTED_PROTOCOL: ${{ matrix.protocol-version }}
       STELLAR_RPC_INTEGRATION_TESTS_CAPTIVE_CORE_BIN: /usr/bin/stellar-core
-      PROTOCOL_21_CORE_DEBIAN_PKG_VERSION: 22.1.0-2194.0241e79f7.focal
-      PROTOCOL_21_CORE_DOCKER_IMG: stellar/stellar-core:22.1.0-2194.0241e79f7.focal
       PROTOCOL_22_CORE_DEBIAN_PKG_VERSION: 22.1.1-2251.ac9f21ac7.focal~do~not~use~in~prd
       PROTOCOL_22_CORE_DOCKER_IMG: stellar/unsafe-stellar-core:22.1.1-2251.ac9f21ac7.focal-do-not-use-in-prd
+      # TODO: Add a protocol 23 run once the builds are ready.
 
     steps:
       - uses: actions/checkout@v4

cmd/stellar-rpc/internal/methods/send_transaction.go

@@ -118,7 +118,7 @@ func NewSendTransactionHandler(
 					}
 				}
 
-				diagEvents := xdr.DiagnosticEvents{}
+				diagEvents := []xdr.DiagnosticEvent{}
 				err = xdr.SafeUnmarshalBase64(resp.DiagnosticEvents, &diagEvents)
 				if err != nil {
 					logger.WithField("tx", request.Transaction).

go.mod

@@ -18,7 +18,7 @@ require (
 	github.com/sirupsen/logrus v1.9.3
 	github.com/spf13/cobra v1.7.0
 	github.com/spf13/pflag v1.0.5
-	github.com/stellar/go v0.0.0-20250206032706-4e70599a66af
+	github.com/stellar/go v0.0.0-20250227215244-b7b0b5e2a297
 	github.com/stretchr/testify v1.9.0
 )
 

go.sum

@@ -342,8 +342,10 @@ github.com/spf13/pflag v1.0.5 h1:iy+VFUOCP1a+8yFto/drg2CJ5u0yRoB7fZw3DKv/JXA=
 github.com/spf13/pflag v1.0.5/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
 github.com/spf13/viper v1.17.0 h1:I5txKw7MJasPL/BrfkbA0Jyo/oELqVmux4pR/UxOMfI=
 github.com/spf13/viper v1.17.0/go.mod h1:BmMMMLQXSbcHK6KAOiFLz0l5JHrU89OdIRHvsk0+yVI=
-github.com/stellar/go v0.0.0-20250206032706-4e70599a66af h1:yG64bllyRf+nCOEXgXHZ721pX+D6NgZnNL2e1pQTUCA=
-github.com/stellar/go v0.0.0-20250206032706-4e70599a66af/go.mod h1:ewcAL4pit/jqFszQws9C2U6pwGSy4ZKZD3J/vvjCtgQ=
+github.com/stellar/go v0.0.0-20250225004107-c5828bcf20c6 h1:tPV4hOYuez6mSAmLj1ErgVckrW3ov7/oXgt53W1VNq8=
+github.com/stellar/go v0.0.0-20250225004107-c5828bcf20c6/go.mod h1:pIh0xYFVnaMP9fLnjFT7URY9Zhwy5wuc6tQkYybKkUY=
+github.com/stellar/go v0.0.0-20250227215244-b7b0b5e2a297 h1:LdpVXwVgQ+wx0e6SdpVW3J4WkaHiXrhl+0uf0WIq4Lo=
+github.com/stellar/go v0.0.0-20250227215244-b7b0b5e2a297/go.mod h1:pIh0xYFVnaMP9fLnjFT7URY9Zhwy5wuc6tQkYybKkUY=
 github.com/stellar/go-xdr v0.0.0-20231122183749-b53fb00bcac2 h1:OzCVd0SV5qE3ZcDeSFCmOWLZfEWZ3Oe8KtmSOYKEVWE=
 github.com/stellar/go-xdr v0.0.0-20231122183749-b53fb00bcac2/go.mod h1:yoxyU/M8nl9LKeWIoBrbDPQ7Cy+4jxRcWcOayZ4BMps=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=