package errs
// MCPErrorCode represents MCP protocol error codes
type MCPErrorCode int
const (
// MCP protocol error codes based on JSON-RPC 2.0 spec
MCPErrorInvalidRequest MCPErrorCode = -32600
MCPErrorMethodNotFound MCPErrorCode = -32601
MCPErrorInvalidParams MCPErrorCode = -32602
MCPErrorInternalError MCPErrorCode = -32603
MCPErrorParseError MCPErrorCode = -32700
// MCP-specific error codes
MCPErrorNotFound MCPErrorCode = -32001
MCPErrorConflict MCPErrorCode = -32002
MCPErrorUnavailable MCPErrorCode = -32003
MCPErrorUnsupported MCPErrorCode = -32004
MCPErrorPermissionDenied MCPErrorCode = -32005
MCPErrorUnauthenticated MCPErrorCode = -32006
)
// ToMCPError translates a typed error to MCP error code and message
func ToMCPError(err error) (MCPErrorCode, string) {
if e, ok := err.(*Error); ok {
return codeToMCPError(e.code), e.message
}
// Default to internal error for non-typed errors
return MCPErrorInternalError, err.Error()
}
// codeToMCPError maps canonical error codes to MCP error codes
func codeToMCPError(code Code) MCPErrorCode {
switch code {
case CodeInvalidArgument:
return MCPErrorInvalidParams
case CodeNotFound:
return MCPErrorNotFound
case CodeAlreadyExists, CodeConflict:
return MCPErrorConflict
case CodePermissionDenied:
return MCPErrorPermissionDenied
case CodeUnauthenticated:
return MCPErrorUnauthenticated
case CodeFailedPrecondition:
return MCPErrorInvalidParams
case CodeUnavailable:
return MCPErrorUnavailable
case CodeUnsupported:
return MCPErrorUnsupported
case CodeInternal:
return MCPErrorInternalError
default:
return MCPErrorInternalError
}
}
