Hifi

Hifi Cross-Chain Bridge API

Cross-Chain Bridge endpoints

GitHub OpenAPI

Operations 4

POST /v2/wallets/bridges Create a bridging request
GET /v2/wallets/bridges List all bridging requests
POST /v2/wallets/bridges/{transferId}/accept Accept a bridging request
GET /v2/wallets/bridges/{transferId} Retrieve a bridging request

Documentation

📖
Documentation
https://docs.hifi.com/guides/quickstart
📖
APIReference
https://docs.hifi.com/api-reference

Specifications

⚙
OpenAPI
https://raw.githubusercontent.com/api-evangelist/hifi/refs/heads/main/openapi/hifi-cross-chain-bridge-api-openapi.yml

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OpenAPI Specification

hifi-cross-chain-bridge-api-openapi.yml Raw ↑ 
openapi: 3.2.0
info:
  title: Hifi Account Cross-Chain Bridge API
  version: 2.0.0
  description: API documentation for Hifi
servers:
- url: https://production.hifibridge.com
  description: Production server
- url: https://sandbox.hifibridge.com
  description: Sandbox server
security:
- bearerAuth: []
tags:
- name: Cross-Chain Bridge
  description: Cross-Chain Bridge endpoints
paths:
  /v2/wallets/bridges:
    post:
      summary: Create a bridging request
      description: Create a bridging request to bridge crypto assets across chains.
      tags:
      - Cross-Chain Bridge
      requestBody:
        $ref: '#/components/requestBodies/CreateBridgingRequestBody'
      responses:
        '200':
          $ref: '#/components/responses/BridgeAssetTransferResponse'
        '401':
          $ref: '#/components/responses/UnauthorizedResponse'
        '404':
          $ref: '#/components/responses/NotFoundResponse'
        '500':
          $ref: '#/components/responses/InternalServerErrorResponse'
    get:
      summary: List all bridging requests
      description: 'Returns a list of bridging requests associated with a user under your organization.

        '
      tags:
      - Cross-Chain Bridge
      parameters:
      - $ref: '#/components/parameters/UserIdOptionalParameter'
      - $ref: '#/components/parameters/LimitParameter'
      - $ref: '#/components/parameters/CreatedBeforeParameter'
      - $ref: '#/components/parameters/CreatedAfterParameter'
      responses:
        '200':
          $ref: '#/components/responses/BridgeAssetAllRecordsResponse'
        '401':
          $ref: '#/components/responses/UnauthorizedResponse'
        '404':
          $ref: '#/components/responses/NotFoundResponse'
        '500':
          $ref: '#/components/responses/InternalServerErrorResponse'
  /v2/wallets/bridges/{transferId}/accept:
    post:
      summary: Accept a bridging request
      description: 'Accept a bridging request to initialize the bridging of crypto assets across chains.

        '
      tags:
      - Cross-Chain Bridge
      parameters:
      - $ref: '#/components/parameters/BridgingRequestIDPathParameter'
      responses:
        '200':
          $ref: '#/components/responses/BridgeAssetTransferResponse'
        '401':
          $ref: '#/components/responses/UnauthorizedResponse'
        '404':
          $ref: '#/components/responses/NotFoundResponse'
        '500':
          $ref: '#/components/responses/InternalServerErrorResponse'
  /v2/wallets/bridges/{transferId}:
    get:
      summary: Retrieve a bridging request
      tags:
      - Cross-Chain Bridge
      parameters:
      - $ref: '#/components/parameters/BridgingRequestIDPathParameter'
      responses:
        '200':
          $ref: '#/components/responses/BridgeAssetRecordResponse'
        '401':
          $ref: '#/components/responses/UnauthorizedResponse'
        '404':
          $ref: '#/components/responses/NotFoundResponse'
        '500':
          $ref: '#/components/responses/InternalServerErrorResponse'
components:
  parameters:
    UserIdOptionalParameter:
      name: userId
      in: query
      schema:
        type: string
      description: The user ID.
      required: false
    BridgingRequestIDPathParameter:
      name: transferId
      in: path
      schema:
        type: string
      description: Transfer record ID.
      required: true
    CreatedBeforeParameter:
      name: createdBefore
      in: query
      schema:
        type: string
        format: date
      description: 'ISO format: YYYY-MM-DD'
      required: false
    LimitParameter:
      name: limit
      in: query
      schema:
        type: string
        minimum: 1
        maximum: 100
      description: default to 10, maximum to 100
      required: false
    CreatedAfterParameter:
      name: createdAfter
      in: query
      schema:
        type: string
        format: date
      description: 'ISO format: YYYY-MM-DD'
      required: false
  schemas:
    BridgeAssetTransferListObject:
      type: object
      properties:
        count:
          type: integer
        data:
          type: array
          items:
            $ref: '#/components/schemas/BridgeAssetTransferObject'
        nextCursor:
          type: string
          description: The `createdAt` timestamp of the last record in the current page. Pass this as `createdBefore` in the next request to retrieve the next page of results.
      example:
        count: 1
        data:
        - transferType: WALLET.BRIDGE
          transferDetails:
            id: 9ccafd0f-e47f-43c2-8693-13741b67d638
            requestId: 1d860428-1d0b-47c5-9e65-98961ff59215
            createdAt: '2025-02-24T17:44:54.781+00:00'
            updatedAt: '2025-02-24T17:57:01.185+00:00'
            amount: 0.01
            status: COMPLETED
            source:
              userId: a804f891-b63c-4b36-99ee-0aa83e6facde
              walletAddress: '0xE9cfBf1D690565579D823264170eE357f80e9A34'
              chain: POLYGON
              currency: usdc
            destination:
              userId: a804f891-b63c-4b36-99ee-0aa83e6facde
              walletAddress: '0x17f043FB0a39334641beD627551AC095941157B0'
              chain: ETHEREUM
              currency: usdc
            failedReason: null
            receipt:
              transactionHash: '0x17f043FB0a39334641beD627551AC095941157B0'
              operations:
                mint:
                  transactionHash: '0x5784890f9efd0160e9401439a5cf2aa5350580ecf48f9ca2af617338ae089e53'
                  userOpHash: '0xef7bdb071b1fcfb5df629bd4d27ffa6dc32d0a5df676f26fb8c25311df1185ac'
                  chain: ETHEREUM
                approve:
                  transactionHash: '0x5784890f9efd0160e9401439a5cf2aa5350580ecf48f9ca2af617338ae089e53'
                  userOpHash: '0xef7bdb071b1fcfb5df629bd4d27ffa6dc32d0a5df676f26fb8c25311df1185ac'
                  chain: POLYGON
                burn:
                  transactionHash: '0x5784890f9efd0160e9401439a5cf2aa5350580ecf48f9ca2af617338ae089e53'
                  userOpHash: '0xef7bdb071b1fcfb5df629bd4d27ffa6dc32d0a5df676f26fb8c25311df1185ac'
                  chain: POLYGON
            fee: null
            quoteInformation:
              sendGross:
                amount: '0.01'
                currency: usdc
              sendNet:
                amount: '0.01'
                currency: usdc
              railFee:
                amount: '0'
                currency: usdc
              receiveGross:
                amount: '0.01'
                currency: usdc
              receiveNet:
                amount: '0.01'
                currency: usdc
              rate: '1'
              expiresAt: '2025-02-25T17:44:54.781Z'
        nextCursor: '2025-02-24T17:44:54.781+00:00'
    CreateBridgingRequest:
      type: object
      title: Bridging Request
      properties:
        requestId:
          type: string
          description: unique identifier for the request (recommend using uuid v4)
        amount:
          type: number
          format: float
          minimum: 0
          description: amount of crypto currency to bridge
        source:
          type: object
          description: bridging source
          $ref: '#/components/schemas/BridgingRequestSource'
        destination:
          type: object
          description: bridging destination
          $ref: '#/components/schemas/BridgingRequestDestination'
        requireApproval:
          type: boolean
          description: 'Whether this bridging request requires approval before processing.

            - `true`: Request will enter approval workflow

            - `false` or omitted: Request proceeds immediately

            '
          default: false
          example: false
      required:
      - requestId
      - amount
      - source
      - destination
    InternalServerError:
      type: object
      properties:
        error:
          type: string
          example: Unexpected error happened
    BridgeAssetTransferObject:
      type: object
      properties:
        transferType:
          type: string
        transferDetails:
          type: object
          properties:
            id:
              type: string
              format: uuid
            requestId:
              type: string
              format: uuid
            createdAt:
              type: string
              format: date-time
            updatedAt:
              type: string
              format: date-time
            amount:
              type: number
            status:
              type: string
              enum:
              - NOT_INITIATED
              - OPEN_QUOTE
              - CREATED
              - SOURCE_INITIATED
              - SOURCE_PENDING
              - SOURCE_PROCESSED
              - SOURCE_FAILED
              - DESTINATION_INITIATED
              - DESTINATION_PENDING
              - COMPLETED
              - DESTINATION_FAILED
              - QUOTE_FAILED
              - UNKNOWN
            source:
              type: object
              properties:
                userId:
                  type: string
                  format: uuid
                walletAddress:
                  type: string
                chain:
                  type: string
                currency:
                  type: string
            destination:
              type: object
              properties:
                userId:
                  type: string
                  format: uuid
                walletAddress:
                  type: string
                chain:
                  type: string
                currency:
                  type: string
            receipt:
              type: object
              properties:
                transactionHash:
                  type: string
                operations:
                  type: object
                  properties:
                    mint:
                      type: object
                      properties:
                        transactionHash:
                          type:
                          - string
                          - 'null'
                        userOpHash:
                          type:
                          - string
                          - 'null'
                        chain:
                          type:
                          - string
                          - 'null'
                    burn:
                      type: object
                      properties:
                        transactionHash:
                          type:
                          - string
                          - 'null'
                        userOpHash:
                          type:
                          - string
                          - 'null'
                        chain:
                          type:
                          - string
                          - 'null'
                    approve:
                      type: object
                      properties:
                        transactionHash:
                          type:
                          - string
                          - 'null'
                        userOpHash:
                          type:
                          - string
                          - 'null'
                        chain:
                          type:
                          - string
                          - 'null'
            failedReason:
              type:
              - string
              - 'null'
            fee:
              type:
              - number
              - 'null'
            quoteInformation:
              type: object
              properties:
                sendGross:
                  type: object
                  properties:
                    amount:
                      type: string
                    currency:
                      type: string
                sendNet:
                  type: object
                  properties:
                    amount:
                      type: string
                    currency:
                      type: string
                railFee:
                  type: object
                  properties:
                    amount:
                      type: string
                    currency:
                      type: string
                receiveGross:
                  type: object
                  properties:
                    amount:
                      type: string
                    currency:
                      type: string
                receiveNet:
                  type: object
                  properties:
                    amount:
                      type: string
                    currency:
                      type: string
                rate:
                  type: string
                expiresAt:
                  type: string
                  format: date-time
      example:
        transferType: WALLET.BRIDGE
        transferDetails:
          id: 9ccafd0f-e47f-43c2-8693-13741b67d638
          requestId: 1d860428-1d0b-47c5-9e65-98961ff59215
          createdAt: '2025-02-24T17:44:54.781519+00:00'
          updatedAt: '2025-02-24T17:57:01.185+00:00'
          amount: 0.01
          status: COMPLETED
          source:
            userId: a804f891-b63c-4b36-99ee-0aa83e6facde
            walletAddress: '0xE9cfBf1D690565579D823264170eE357f80e9A34'
            chain: POLYGON
            currency: usdc
          destination:
            userId: a804f891-b63c-4b36-99ee-0aa83e6facde
            walletAddress: '0x17f043FB0a39334641beD627551AC095941157B0'
            chain: ETHEREUM
            currency: usdc
          receipt:
            transactionHash: '0x17f043FB0a39334641beD627551AC095941157B0'
            operations:
              mint:
                transactionHash: '0x5784890f9efd0160e9401439a5cf2aa5350580ecf48f9ca2af617338ae089e53'
                userOpHash: '0xef7bdb071b1fcfb5df629bd4d27ffa6dc32d0a5df676f26fb8c25311df1185ac'
                chain: ETHEREUM
              burn:
                transactionHash: '0x5784890f9efd0160e9401439a5cf2aa5350580ecf48f9ca2af617338ae089e53'
                userOpHash: '0xef7bdb071b1fcfb5df629bd4d27ffa6dc32d0a5df676f26fb8c25311df1185ac'
                chain: POLYGON
              approve:
                transactionHash: '0x5784890f9efd0160e9401439a5cf2aa5350580ecf48f9ca2af617338ae089e53'
                userOpHash: '0xef7bdb071b1fcfb5df629bd4d27ffa6dc32d0a5df676f26fb8c25311df1185ac'
                chain: POLYGON
          failedReason: null
          fee: null
          quoteInformation:
            sendGross:
              amount: '0.01'
              currency: usdc
            sendNet:
              amount: '0.01'
              currency: usdc
            railFee:
              amount: '0'
              currency: usdc
            receiveGross:
              amount: '0.01'
              currency: usdc
            receiveNet:
              amount: '0.01'
              currency: usdc
            rate: '1'
            expiresAt: '2025-02-25T17:44:54.781Z'
    Unauthorized:
      type: object
      properties:
        error:
          type: string
          example: Not authorized
    BridgingRequestSource:
      type: object
      properties:
        userId:
          type: string
          format: uuid
          description: user who is sending the crypto
        chain:
          type: string
          enum:
          - POLYGON
          - ETHEREUM
          - SOLANA
        currency:
          type: string
          enum:
          - usdc
          - usdt
          description: crypto currency
      required:
      - userId
      - chain
      - currency
    BridgingRequestDestination:
      type: object
      properties:
        userId:
          type: string
          format: uuid
          description: user who is receiving the crypto
        chain:
          type: string
          enum:
          - POLYGON
          - ETHEREUM
          - BASE
          - OPTIMISM
          - ARBITRUM
          - SOLANA
        currency:
          type: string
          enum:
          - usdc
          - usdt
          description: crypto currency
        walletAddress:
          type: string
          description: 'wallet address that is receiving the crypto (should provide either `userId` or `walletAddress`)

            To use this feature, please ensure you''re enrolled in HIFI''s Gas Sponsorship Program or provide a userId; otherwise, the transaction may get stuck.

            '
      required:
      - chain
      - currency
  responses:
    BridgeAssetAllRecordsResponse:
      description: Success
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/BridgeAssetTransferListObject'
    NotFoundResponse:
      description: Resource not found
      content:
        application/json:
          schema:
            type: object
            properties:
              status:
                type: string
                enum:
                - error
              error:
                type: object
                properties:
                  code:
                    type: string
                  message:
                    type: string
    BridgeAssetTransferResponse:
      description: Success
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/BridgeAssetTransferObject'
    BridgeAssetRecordResponse:
      description: Success
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/BridgeAssetTransferObject'
    InternalServerErrorResponse:
      description: Internal Server Error
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/InternalServerError'
    UnauthorizedResponse:
      description: Unauthorized
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Unauthorized'
  requestBodies:
    CreateBridgingRequestBody:
      required: true
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/CreateBridgingRequest'
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      bearerFormat: JWT