> ## Documentation Index > Fetch the complete documentation index at: https://developers.circle.com/llms.txt > Use this file to discover all available pages before exploring further. # Generate trade presign data > Returns the EIP-712 Permit2 payload that the maker must sign for a trade. ## OpenAPI ````yaml openapi/stablefx.yaml get /v1/exchange/stablefx/signatures/presign/{tradeId} openapi: 3.1.0 info: title: StableFX API description: > The StableFX API provides endpoints for trading stablecoins. ## Authentication All API requests require authentication using an API key. ## Base URL The base URL for all API endpoints is: `https://api.circle.com/v1/exchange/stablefx` version: 1.0.0 servers: - url: https://api.circle.com description: StableFX API server security: - BearerAuth: [] tags: - name: Quotes description: Endpoints for creating and managing quotes - name: Trades description: Endpoints for creating and managing trades - name: Signatures description: Endpoints for retrieving presign typed data and registering signatures - name: Fees description: Endpoints for retrieving fees - name: Funding description: Endpoints for funding trades - name: Webhook Subscriptions description: Manage subscriptions to notifications - name: Settlement Advance description: Request, track, and repay settlement advances. paths: /v1/exchange/stablefx/signatures/presign/{tradeId}: get: tags: - Signatures summary: Generate trade presign data description: >- Returns the EIP-712 Permit2 payload that the maker must sign for a trade. operationId: generateTradeSignatureData parameters: - in: path name: tradeId required: true description: The ID of the trade. schema: $ref: '#/components/schemas/Id' - in: query name: recipientAddress required: true description: The address of the recipient of the settlement tokens. schema: $ref: '#/components/schemas/BlockchainAddress' responses: '200': description: Signature data generated successfully content: application/json: schema: $ref: '#/components/schemas/TradePresignData' security: - BearerAuth: [] components: schemas: Id: type: string format: uuid description: System-generated unique identifier of the resource. example: c4d1da72-111e-4d52-bdbf-2e74a2d803d5 BlockchainAddress: type: string description: A blockchain address example: '0x1234567890abcdef1234567890abcdef12345678' TradePresignData: type: object description: Permit2 EIP-712 Typed Data for Trade Registration required: - typedData properties: typedData: $ref: '#/components/schemas/TradeTypedData' TradeTypedData: type: object description: EIP-712 typed data for trade registration required: - domain - types - primaryType - message properties: domain: $ref: '#/components/schemas/Permit2EIP712Domain' types: type: object description: EIP-712 types definition required: - EIP712Domain - Consideration properties: EIP712Domain: type: array items: type: object properties: name: type: string type: type: string Consideration: type: array items: type: object properties: name: type: string type: type: string TraderDetails: type: array description: >- Type definition for trader (maker or taker) trades. Replaces the legacy TakerDetails and MakerDetails type definitions and adds the `authorizer` field. items: type: object properties: name: type: string type: type: string example: - name: consideration type: Consideration - name: recipient type: address - name: fee type: uint256 - name: authorizer type: address TokenPermissions: type: array description: Type definition for token permissions items: type: object properties: name: type: string type: type: string PermitWitnessTransferFrom: type: array description: Type definition for permit witness transfer items: type: object properties: name: type: string type: type: string primaryType: type: string description: The primary type for the EIP-712 data to be signed enum: - PermitWitnessTransferFrom example: PermitWitnessTransferFrom message: $ref: '#/components/schemas/TradePermit2Message' Permit2EIP712Domain: type: object description: Permit2 EIP-712 domain separator required: - name - chainId - verifyingContract properties: name: type: string description: The name of the signing domain example: Permit2 chainId: type: integer description: The chain ID of the network example: 11155111 verifyingContract: type: string description: The address of the verifying contract example: '0xffd21ca8F0876DaFAD7de09404E0c1f868bbf1AE' TradePermit2Message: type: object description: The Permit2 message for trade registration required: - permitted - spender - nonce - deadline - witness properties: permitted: type: object description: Token permission details required: - token - amount properties: token: type: string description: The address of the token to be funded example: '0x3600000000000000000000000000000000000000' amount: type: string description: >- The prefunded risk buffer amount of tokens to be funded, as a string representation of a uint256 example: '429000000' spender: type: string description: The address of the StableFX contract example: '0xa8f94168b4981840ba27d423f4ad6332bedee006' nonce: type: string description: >- A unique nonce for the signature to prevent replay attacks, as a string representation of a uint256 example: '309585810' deadline: type: string format: epoch description: >- The validity period for the signature in epoch seconds, as a string representation of a uint256 example: '1770302983' witness: type: object description: Witness data containing trade details required: - consideration - fee - authorizer properties: consideration: $ref: '#/components/schemas/TradeSignatureConsideration' recipient: type: - string - 'null' description: >- The address of the recipient of the trade. Only included in taker trades, null for maker trades. example: '0x1f531ce3c418bbd830d06138a9e5b5eacfdfb3d6' fee: type: string description: The fee for the trade, as a string representation of a uint256 example: '80000' authorizer: type: string description: >- The authorizer is the address of the entity that authorizes the trade. For StableFX this does not need to be set and defaults to the zero-address sentinel. example: '0x0000000000000000000000000000000000000000' TradeSignatureConsideration: type: object description: EIP-712 typed data for a StableFX trade created from a quote. properties: quoteId: type: string base: type: string quote: type: string baseAmount: type: string quoteAmount: type: string maturity: type: string format: epoch description: >- The settlement maturity timestamp for the trade, as a string representation of a uint256 example: '1716153600' securitySchemes: BearerAuth: type: http scheme: bearer bearerFormat: PREFIX:ID:SECRET description: >- Circle's API Keys are formatted in the following structure "PREFIX:ID:SECRET". All three parts are requred to make a successful request. ````