Refactor to remove native task wrapper

[Kailai-Wang]

Context

Fixes P-1717

This PR tries to remove teh NativeTaskWrapper (and thus native-task-handler) completely by inlining the handling directly in rpc method handler.

With help-check of claude It tries to keep the error handling backwards compatible/same so we don't return e.g. different error code, but much of the code is not used so I'm not 100% sure if it covers all cases strictly, as I indeed find some unused error codes in error_code.rs

Some more clean-ups:

• the client_id in middleware auth is actually not used, so I unwrap the struct User to use the underlying omni_account directly
• omni_submitNativeTask is removed, together with task primitives definitions
• ethereum-intent-executor and solana-intent-executor are removed from start_server and RpcContext

[linear]

P-1717 analyse and remove native task layer

[vercel]

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Project	Deployment	Preview	Comments	Updated (UTC)
heima-aa-demo-app	Ready	Preview	Comment	Oct 22, 2025 10:44pm

[claude]

Claude encountered an error —— View job

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PR Review: Refactor to remove native task wrapper

Reviewing this large refactoring PR that removes the NativeTaskWrapper layer. Here's my analysis plan:

Todo List

• Read repository guidelines (CLAUDE.md) - Not found
• Analyze deleted files and understand removed functionality
• Review key changed files for implementation quality
• Check error handling backwards compatibility
• Review security implications of auth changes
• Assess performance considerations
• Check for potential bugs and edge cases
• Verify proper cleanup of dependencies
• Provide comprehensive feedback and recommendations

Initial Analysis

This PR makes significant changes by removing the entire native-task-handler crate (3611 lines deleted) and inlining its functionality directly into RPC method handlers. Key observations:

1. Removed Components:

   • native-task-handler crate completely deleted
   • submit_native_task.rs method removed
   • Intent executors removed from server startup
   • Task wrapper abstraction eliminated

2. Simplifications:

   • Auth middleware simplified to use omni_account directly instead of User struct
   • Direct handler invocation instead of task wrapper pattern
   • Consolidated error handling into RPC methods

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[silva-fj]

LGTM