Enhance Solana transaction support and add new dependencies (#78)

* Enhance Solana transaction support and add new dependencies

- Introduced `SolanaSigner` to the engine core for improved Solana transaction handling.
- Added `base64`, `bincode`, `solana-client`, and `solana-sdk` as dependencies in `Cargo.toml`.
- Updated server state to include `solana_signer` and added new route for signing Solana transactions.

* Add Solana RPC cache support in server

- Introduced `SolanaRpcCache` to manage RPC URLs for Solana transactions.
- Updated server state to include `solana_rpc_cache` for efficient RPC client retrieval.
- Refactored transaction signing logic to utilize the new RPC cache, improving performance and reliability.

* add integration testing infra

* use spl interface

* fix deps

Author: d4mr

Cargo.lock

@@ -9,6 +9,7 @@ members = [
   "solana-core",
   "thirdweb-core",
   "twmq",
+  "integration-tests",
 ]
 resolver = "2"
 
@@ -28,7 +29,9 @@ solana-transaction-status = "3.0"
 solana-connection-cache = "3.0"
 solana-commitment-config = "3.0"
 solana-compute-budget-interface = "3.0"
+solana-system-interface = { version = "2.0", features = ["bincode"] }
 spl-memo-interface = "2.0"
+spl-token-2022-interface = "2.1"
 
 # AWS
 aws-config = "1.8.2"

Cargo.toml

@@ -0,0 +1,2 @@
+/target
+*local.yaml

integration-tests/.gitignore

@@ -0,0 +1,44 @@
+[package]
+name = "engine-integration-tests"
+version = "0.1.0"
+edition = "2024"
+
+[lib]
+test = false    # Don't build unit test harness for src/lib.rs etc.
+doctest = false # Don't run doc tests for the library
+
+[dependencies]
+anyhow = { workspace = true }
+tokio = { workspace = true, features = ["full"] }
+tracing = { workspace = true }
+tracing-subscriber = { workspace = true, features = ["env-filter"] }
+serde = { workspace = true }
+serde_json = { workspace = true }
+base64 = { workspace = true }
+bincode = { workspace = true }
+moka = { workspace = true }
+reqwest = { workspace = true, features = ["json"] }
+prometheus = { workspace = true }
+config = { workspace = true }
+
+# Solana dependencies
+solana-sdk = { workspace = true, features = ["full"] }
+solana-client = { workspace = true }
+solana-system-interface = { workspace = true }
+spl-token-2022-interface = { workspace = true }
+
+# Vault/Engine dependencies
+vault-sdk = { workspace = true }
+vault-types = { workspace = true }
+engine-solana-core = { path = "../solana-core" }
+engine-core = { path = "../core" }
+engine-executors = { path = "../executors" }
+thirdweb-core = { path = "../thirdweb-core" }
+
+# Testing utilities
+once_cell = "1.20"
+
+[dev-dependencies]
+thirdweb-engine = { path = "../server" }
+twmq = { path = "../twmq" }
+rand = { workspace = true }