Revert main.rs - #5
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Reviewer's Guide by SourceryThis pull request introduces a comprehensive Solana MCP server implementation with rate limiting, circuit breaker, caching, retry mechanism, and various tools for interacting with the Solana RPC endpoint. It also configures the server to use StdioTransport for communication and adds initialization options and server capabilities. Sequence diagram for handling a tool requestsequenceDiagram
participant Client
participant SolanaMcpServer
participant RpcClient
Client->>SolanaMcpServer: CallToolRequest
activate SolanaMcpServer
SolanaMcpServer->>SolanaMcpServer: check_rate_limit()
alt Circuit Breaker Open
SolanaMcpServer-->>Client: Error: Service Unavailable
else Tool Execution
SolanaMcpServer->>RpcClient: Solana RPC Call
activate RpcClient
alt Success
RpcClient-->>SolanaMcpServer: Result
SolanaMcpServer-->>Client: CallToolResponse
else Failure
RpcClient-->>SolanaMcpServer: Error
SolanaMcpServer->>SolanaMcpServer: record_failure()
SolanaMcpServer-->>Client: Error
end
deactivate RpcClient
end
deactivate SolanaMcpServer
Sequence diagram for handling a read resource requestsequenceDiagram
participant Client
participant SolanaMcpServer
participant RpcClient
participant Cache
Client->>SolanaMcpServer: ReadResourceRequest
activate SolanaMcpServer
alt Circuit Breaker Open
SolanaMcpServer-->>Client: Error: Service Unavailable
else Cache Hit
SolanaMcpServer->>Cache: Get resource from cache
Cache-->>SolanaMcpServer: Cached ResourceContent
SolanaMcpServer-->>Client: ResourceContent
else Cache Miss or Expired
SolanaMcpServer->>RpcClient: Solana RPC Call
activate RpcClient
alt Success
RpcClient-->>SolanaMcpServer: Result
SolanaMcpServer->>Cache: Update cache
Cache-->>SolanaMcpServer: OK
SolanaMcpServer-->>Client: ResourceContent
else Failure
RpcClient-->>SolanaMcpServer: Error
SolanaMcpServer->>SolanaMcpServer: record_failure()
SolanaMcpServer-->>Client: Error
end
deactivate RpcClient
end
deactivate SolanaMcpServer
Updated class diagram for SolanaMcpServerclassDiagram
class SolanaMcpServer {
-rpc_client: RpcClient
-request_count: AtomicU32
-last_reset: Mutex<Instant>
-resources: Vec<Resource>
-resource_templates: Vec<ResourceTemplate>
-resource_cache: Arc<RwLock<HashMap<String, CachedResource>>>
-circuit_breaker: CircuitBreaker
-transport: Arc<RwLock<Option<Box<dyn Transport>>>>
+new(): SolanaMcpServer
+retry_with_backoff<F, T>(future: F): Result<T>
+update_cache(uri: &str, content: Vec<ResourceContent>)
+check_rate_limit(): Result<()>
+handle_read_resource(request: ReadResourceRequest): Result<Vec<ResourceContent>>
+handle_request(request: CallToolRequest): Result<CallToolResponse>
+handle_tool_request(request: CallToolRequest): Result<CallToolResponse>
+connect(transport: Box<dyn Transport>, options: InitializationOptions) Result<()>
+list_tools() Result<Vec<Tool>>
+send(message: &JsonRpcMessage) Result<()>
+receive() Result<JsonRpcMessage>
+open() Result<()>
+close() Result<()>
}
class CachedResource {
-content: Vec<ResourceContent>
-timestamp: Instant
}
class CircuitBreaker {
-failures: AtomicU32
-last_failure: Mutex<Instant>
-threshold: u32
-reset_timeout: Duration
+new(threshold: u32, reset_timeout: Duration): CircuitBreaker
+record_failure(): bool
+is_open(): bool
+reset()
}
SolanaMcpServer -- RpcClient
SolanaMcpServer -- CachedResource
SolanaMcpServer -- CircuitBreaker
SolanaMcpServer -- Resource
SolanaMcpServer -- ResourceTemplate
SolanaMcpServer -- Transport
Class diagram for Resource and ResourceTemplateclassDiagram
class Resource {
-uri: string
-name: string
-description: string
-mime_type: string
}
class ResourceTemplate {
-uri_template: string
-name: string
-description: string
-mime_type: string
}
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Hey @7flash - I've reviewed your changes - here's some feedback:
Overall Comments:
- Consider adding a mechanism to dynamically update the list of available resources and resource templates.
- The
Transporttrait implementation forSolanaMcpServeruses blocking read/write operations; consider using async alternatives to avoid blocking the tokio runtime.
Here's what I looked at during the review
- 🟢 General issues: all looks good
- 🟢 Security: all looks good
- 🟢 Testing: all looks good
- 🟢 Complexity: all looks good
- 🟢 Documentation: all looks good
Help me be more useful! Please click 👍 or 👎 on each comment and I'll use the feedback to improve your reviews.
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@devloai finish this please |
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PR Summary:
This PR claims to revert changes to main.rs, but actually introduces significant new functionality including rate limiting, circuit breaker pattern, caching, retry mechanisms, and numerous Solana RPC tools. The implementation completely changes the server architecture from what exists in the main branch.
Review Summary:
I've identified several critical issues that would prevent the code from compiling or functioning properly, including missing type definitions, missing imports, and incorrect handling of messages. Most importantly, this PR claims to be a revert but is actually adding substantial new code, which contradicts the PR description. I'd appreciate your feedback on this review to help improve future ones.
Follow-up suggestions:
@devloai clarify whether this PR is intended to be a revert or a feature enhancement
@devloai fix the compilation and functionality issues identified
| request_count: std::sync::atomic::AtomicU32, | ||
| last_reset: std::sync::Mutex<Instant>, | ||
| resources: Vec<Resource>, | ||
| resource_templates: Vec<ResourceTemplate>, |
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The resource_templates field is using an undefined type ResourceTemplate. This would cause a compilation error. You should properly import this type or define it.
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| let accounts = self.retry_with_backoff(async { | ||
| let accounts = self.rpc_client.get_token_accounts_by_owner( | ||
| &pubkey, |
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The code uses spl_token::id() but there's no import for the spl_token crate in the file. This will cause a compilation error. Add the necessary import.
| } | ||
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| #[async_trait] | ||
| impl Transport for SolanaMcpServer { |
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The implementation of Transport here doesn't match what's in the main branch. In particular, this implementation uses blocking_read() instead of async functions, which could lead to potential deadlocks or performance issues. This change from async to sync behavior is concerning.
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| loop { | ||
| match server.receive() { | ||
| Ok(message) => { |
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The message handling loop doesn't process the incoming message - it just echoes it back as-is. This means that client requests won't get proper responses. The server should parse the request and call appropriate methods based on the request type.
| @@ -2,82 +2,1034 @@ use anyhow::Result; | |||
| use async_trait::async_trait; | |||
| use log::{error, info, warn}; | |||
| use mcp_sdk::{ | |||
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The imports here are rearranged compared to the main branch, and the PR description indicates this is supposed to be a revert. However, the current code is far more complex than what's in main. This doesn't look like a proper revert - it's adding significant new functionality.
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