> ## Documentation Index > Fetch the complete documentation index at: https://docs.getpara.com/llms.txt > Use this file to discover all available pages before exploring further. # Cancel operation > Cancel remaining unsigned work for a yield operation with no unresolved signed transaction. ## OpenAPI ````yaml /openapi.yaml post /v1/wallets/{walletId}/yield/operations/{operationId}/cancel openapi: 3.0.3 info: title: Para REST API version: '1.0' description: Server-to-server wallet creation and signing over HTTP servers: - url: https://api.beta.getpara.com description: Beta - url: https://api.getpara.com description: Production security: - ApiKeyAuth: [] paths: /v1/wallets/{walletId}/yield/operations/{operationId}/cancel: post: tags: - Yield summary: Cancel operation description: >- Cancel remaining unsigned work for a yield operation with no unresolved signed transaction. operationId: cancelYieldOperation parameters: - $ref: '#/components/parameters/WalletId' - $ref: '#/components/parameters/RequestId' - name: operationId in: path required: true schema: type: string format: uuid responses: '200': description: Cancelled operation. content: application/json: schema: $ref: '#/components/schemas/YieldOperation' '400': $ref: '#/components/responses/BadRequest' '401': $ref: '#/components/responses/Unauthorized' '403': $ref: '#/components/responses/Forbidden' '404': $ref: '#/components/responses/NotFound' '409': description: >- Wallet not ready, execution lock busy, or the operation has an unresolved signed transaction or is already complete. content: application/json: schema: $ref: '#/components/schemas/Error' '429': $ref: '#/components/responses/TooManyRequests' '500': $ref: '#/components/responses/ServerError' components: parameters: WalletId: name: walletId in: path required: true description: Wallet UUID. A malformed or inaccessible wallet ID returns `404`. schema: type: string format: uuid example: 0a1b2c3d-4e5f-6789-abcd-ef0123456789 RequestId: name: X-Request-Id in: header required: false description: UUID for request tracing. Para returns one if omitted. schema: type: string format: uuid schemas: YieldOperation: type: object properties: id: type: string format: uuid walletId: type: string format: uuid chainId: type: integer enum: - 1 - 8453 - 11155111 source: type: string enum: - aave-v3 action: type: string enum: - deposit - withdraw amount: type: string description: Normalized decimal USDC amount, or all for withdrawals. example: '10.0' status: type: string enum: - pending - submitted - confirmed - failed - requires_action - cancelled description: >- pending work automatically retries recognized temporary RPC failures before signing and waits for another yield operation on the same wallet. submitted can mean signed and durably stored even when RPC acceptance is uncertain. confirmed requires two confirmations of the canonical block; this is not finality. failed means an on-chain revert or NONCE_CONSUMED; it does not guarantee that no funds moved. requires_action needs an explicit retry after correcting the issue. transactions: type: array items: $ref: '#/components/schemas/YieldTransaction' error: type: object properties: code: type: string description: > AAVE_SUPPLY_CAP_EXCEEDED means the deposit would exceed the Aave market supply cap. The operation is requires_action and no deposit was signed. Retry the same request after capacity is available, or cancel its unsigned work. A confirmed token approval remains. NONCE_CONSUMED means the saved nonce was consumed in a finalized block without a receipt for the original hash. Check the position and transaction history before creating a new request. message: type: string nullable: true reviewId: type: string description: Existing policy review identifier when approval is required. required: - code - message createdAt: type: string format: date-time updatedAt: type: string format: date-time required: - id - walletId - chainId - source - action - amount - status - transactions - createdAt - updatedAt Error: type: object required: - code - message properties: code: type: string description: Machine-readable error code for programmatic handling example: INVALID_REQUEST message: type: string description: Human-readable error message transactionId: type: string format: uuid description: >- Persisted transaction record id. Present only when a broadcast request failed after a history row was created. failureStage: type: string enum: - mpc_sign - signature_apply - signer_verify - broadcast - monitor_timeout description: >- Which stage of the broadcast lifecycle failed. Present on persisted broadcast failures. failureCode: type: string description: >- Machine-readable failure reason from the underlying broadcast helper (e.g. `INSUFFICIENT_NATIVE_BALANCE`, `EXECUTION_FAILED`). Present on broadcast-stage failures. signedTransaction: type: string description: >- Signed transaction bytes. Present on broadcast failures that happen after signing completed. additionalProperties: true description: > All error responses include `code` and `message` fields. Some errors include extra fields (e.g. `walletId` on 409 Conflict). Broadcast failures that occur after a persisted transaction row is created include `transactionId`, `failureStage`, and (on broadcast-stage failures) `failureCode`, and also set the `x-transaction-id` response header. If signing completed before the failure, `signedTransaction` is included so callers can inspect or retry the already-signed bytes. Common error codes: `INVALID_REQUEST`, `UNAUTHORIZED`, `FORBIDDEN`, `NOT_FOUND`, `CONFLICT`, `WALLET_ALREADY_EXISTS`, `WALLET_ALREADY_CLAIMED`, `RATE_LIMITED`, `INTERNAL_ERROR`. YieldTransaction: type: object properties: phase: type: string enum: - approval - action hash: type: string nonce: type: integer minimum: 0 transactionId: type: string format: uuid description: Corresponding transaction history record; intentKind is yield. status: type: string enum: - signed - submitted - confirmed - reverted - failed description: >- failed means the saved nonce was consumed in a finalized block without a receipt for this hash. The original signed bytes cannot execute again; check the position and transaction history before creating a new request. blockNumber: type: integer blockHash: type: string required: - phase - hash - nonce - transactionId - status responses: BadRequest: description: Invalid request body content: application/json: schema: $ref: '#/components/schemas/Error' example: code: INVALID_REQUEST message: type must be one of EVM, SOLANA, COSMOS, STELLAR, SUI Unauthorized: description: API key not provided content: application/json: schema: $ref: '#/components/schemas/Error' example: code: UNAUTHORIZED message: secret api key not provided Forbidden: description: Invalid API key content: application/json: schema: $ref: '#/components/schemas/Error' example: code: FORBIDDEN message: invalid secret api key NotFound: description: Wallet not found content: application/json: schema: $ref: '#/components/schemas/Error' example: code: NOT_FOUND message: wallet not found TooManyRequests: description: Rate limit exceeded headers: Retry-After: schema: type: integer description: Seconds until the rate limit window resets example: 60 content: application/json: schema: $ref: '#/components/schemas/Error' example: code: RATE_LIMITED message: Rate limit exceeded, try again shortly. ServerError: description: Internal server error content: application/json: schema: $ref: '#/components/schemas/Error' example: code: INTERNAL_ERROR message: Internal Server Error securitySchemes: ApiKeyAuth: type: apiKey in: header name: X-API-Key description: Your partner secret key (server-side only) x-default: sk_your_secret_key_here ````