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OpenAPI Specification

openapi: 3.2.0
info:
  title: Transaction Compile API
  version: 1.0.0
  description: Blockdaemon transaction API to create, compile, send and verify transactions for supported blockchains.
  contact:
    name: Blockdaemon
    email: info@blockdaemon.com
    url: https://blockdaemon.com
  x-logo:
    url: https://storage.googleapis.com/blockdaemon-app-static-images/marketing/PNG/dark-logo.png
    altText: Blockdaemon logo
servers:
- url: https://svc.blockdaemon.com/tx/v1
  description: Blockdaemon transaction API
security:
- apiKeyAuthHeader: []
- bearerAuth: []
tags:
- name: Compile
paths:
  /{blockchain_id}/compile:
    parameters:
    - $ref: '#/components/parameters/blockchain_id'
    post:
      summary: Compile an Unsigned Transaction
      description: Takes an unsigned transaction and a signature and returns a signed transaction.
      operationId: TxCompile
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/ApiTxCompileRequest'
            examples:
              evm:
                summary: EVM example
                value:
                  unsigned_tx: e909843b9aca008252089481b7e08f65bdf5648606c89998a9cc81643976478601d1a94a200080808080
                  address: b9aca008252089481b7e08f65bdf5648606c8
                  signature: ''
                  public_key: ''
              btc_single_signature:
                summary: Bitcoin P2PKH example with a single signature for a single UTxO
                value:
                  unsigned_tx: 010000000131da247ea6672d26661559a06d677cf1756feebc2b8fb299a36125b68047d2050000000000ffffffff0210270000000000001976a91417e036c0c8b9e59c99cf1e2d6b7d0a4864a336f988ac729a0000000000001976a914b3d049ba9f8947c29b491cb14ddea70241ba353e88ac00000000
                  signatures:
                  - signature: 3045022100e4db442039a65eb2a0043647a5f88c5211dd3dcc39d4eba379301c87940587190220764dd4609b7efac2be539bdca148072ad172f53314ff68e9f8801f4b1ea754b0
                    address: mwuimViRhJ5nMJDFiS3ZTQ73hmBH1NUjZA
                    public_key: '0x027513c263c79dc1acde054bbb754616b67612924b98893efa73708f73441bccdb'
              btc_multiple_signatures:
                summary: Bitcoin P2WPKH example with multiple signatures for each UTxO
                value:
                  unsigned_tx: 01000000039c9aa424d4db36156a86245dccf4fe0be6feb5c51372d116358e8b5c0a47fd480200000000ffffffffc74f6e194d162b3b80e7e66f8eab7b31ea870d58a0eecaaafb4e29464d77f69c0900000000ffffffffad95de94df324097b0820d24caaeb82aa52ddcd5a07aff62161c33b23cc28bf20800000000ffffffff016c020000000000001600148dd7608be98d6bd93368f24d45b1165b74cb913700000000
                  signatures:
                  - signature: 30440220428fc6fd5cff7b5023699f1e32694c8cab3f8de2dc841d886f9235b2658c0ef4022059e344ea9d5a2434c416ad2164e445aa44d87daaba507bc8f8fde198ab9a5b57
                    address: tb1q3htkpzlf344ajvmg7fx5tvgktd6vhyfhlq9urn
                    public_key: 025dafb4159e25323eb2c7c684bec7de6bb5a3d17b1adc66a0025563e4081adf3f
                  - signature: 304402207ed5e14b8fff54138b1f1e7e3d19c7f7d670c783b5aa157edca7d433eb55e4e5022067ebd3f41b788ecb109d0fb053ae895dfa172ee0556c94bdc1ab798d59753714
                    address: tb1q3htkpzlf344ajvmg7fx5tvgktd6vhyfhlq9urn
                    public_key: 025dafb4159e25323eb2c7c684bec7de6bb5a3d17b1adc66a0025563e4081adf3f
                  - signature: 3045022100a3a2082e864caf7b3645d942a96c68da7aed2bccffbdddf5d11456440f3c960a022073ee6723e6ff1a99f78ced51a04669947f4799fdb55900ddfa4747b9eb5ec4be
                    address: tb1q3htkpzlf344ajvmg7fx5tvgktd6vhyfhlq9urn
                    public_key: 025dafb4159e25323eb2c7c684bec7de6bb5a3d17b1adc66a0025563e4081adf3f
      responses:
        '200':
          description: OK
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ApiTxSigned'
        '401':
          $ref: '#/components/responses/ErrorUnauthorized'
        '429':
          $ref: '#/components/responses/ErrorTooManyRequests'
        '500':
          $ref: '#/components/responses/ErrorInternal'
        '501':
          $ref: '#/components/responses/ErrorNotImplemented'
        '503':
          $ref: '#/components/responses/ErrorServiceUnavailable'
      tags:
      - Compile
components:
  parameters:
    blockchain_id:
      name: blockchain_id
      in: path
      required: true
      description: Either a hyphen seperated protocol-network pair like `ethereum-mainnet` or the `chain-id`
      schema:
        type: string
        default: ethereum-mainnet
  schemas:
    SolanaSignature:
      type: object
      properties:
        signature:
          type: string
          description: A base58 encoded string of the cryptographic signature.
          example: 2A3yw9TAUm55Ka7EnJDM6vZPrtsjmek9bMhGBdiUGgW8aQugNp5CdyLqMNbahbJXMnQ9h2SMFHhbk2R39RSzsSef
          x-oapi-codegen-extra-tags:
            validate: required
      required:
      - signature
    ApiTxCompileRequestStellar:
      title: Api Tx Compile Request Stellar
      type: object
      properties:
        unsigned_tx:
          type: string
          description: The base64 encoded transaction
          x-oapi-codegen-extra-tags:
            validate: required
        signatures:
          type: array
          items:
            $ref: '#/components/schemas/StellarSignature'
          x-oapi-codegen-extra-tags:
            validate: required,dive
        replace_signatures:
          type: boolean
          x-go-type-skip-optional-pointer: true
      required:
      - unsigned_tx
      - signatures
    CosmosSignature:
      type: object
      properties:
        sequence:
          type: integer
          x-go-type: uint64
          x-go-type-skip-optional-pointer: true
        signature:
          type: string
          x-oapi-codegen-extra-tags:
            validate: required
        sign_mode:
          x-go-type: int32
          type: string
          x-go-type-skip-optional-pointer: true
        public_key:
          type: string
      required:
      - sequence
      - sign_mode
      - signature
      - public_key
    ApiTxCompileRequestNear:
      title: Api Tx Compile Request Near
      type: object
      properties:
        unsigned_tx:
          type: string
          description: The unsigned transaction in base64 encoding.
          x-oapi-codegen-extra-tags:
            validate: required
        signature:
          type: string
          description: The signature hex encoded
          x-oapi-codegen-extra-tags:
            validate: required
      required:
      - unsigned_tx
      - signature
    error:
      type: object
      properties:
        type:
          type: string
          description: The HTTP error type.
          example: bad-request
        code:
          type: integer
          description: The numeric error code.
          example: 16384
        title:
          type: string
          description: The short error description.
          example: Invalid Address
        status:
          type: integer
          description: The HTTP status of the error.
          example: 400
        detail:
          type: string
          description: Long error description
          example: The requested address is invalid on this protocol.
    ApiTxCompileRequestEVM:
      title: Api Tx Compile Request EVM
      type: object
      properties:
        unsigned_tx:
          type: string
          description: The unsigned transaction. This transaction is hex RLP encoded and should be encoded wihout the R, S and V values (this is diffrent from what the /create endpoint returns)
          example: 02ed82426880840c1a97ac847e881fdc82520894057cbbc4d1568530991088108ee48fd8b949167f843b9aca0080c0
          x-oapi-codegen-extra-tags:
            validate: required
        address:
          type: string
          description: The hex address.
          example: '0x31c129468975e4ef41135a405000e6428a399a03d023b6627eed4cb95faf19ca'
        signature:
          type: string
          description: A hex encoded string of the cryptographic signature. This should include the R and S values of the signature in ASN1 encoding.
          example: 0x..
          x-oapi-codegen-extra-tags:
            validate: required
        public_key:
          type: string
          description: A hex encoded string of the sender's public key in the 32 byte compressed format.
          example: 0x..
          x-oapi-codegen-extra-tags:
            validate: required
      required:
      - unsigned_tx
      - signature
      - public_key
    ApiTxCompileRequestBTC:
      title: Api Tx Compile Request BTC
      type: object
      properties:
        unsigned_tx:
          type: string
          description: The transaction data needed to sign.
          example: 02f86f0180834c4b40852096a4848082cde49495ad61b0a150d79219dcf64e1e6cc01f0b64c4ce80b844a9059cbb000000000000000000000000e6026f60efc3d0e714f1b89c596aa484ffbd25c800000000000000000000000000000000000000000303b6ae12d00504a8ed8000c0808080
          x-oapi-codegen-extra-tags:
            validate: required
        signatures:
          type: array
          items:
            $ref: '#/components/schemas/signature'
          x-oapi-codegen-extra-tags:
            validate: required,dive
          example:
          - address: '0x31c129468975e4ef41135a405000e6428a399a03d023b6627eed4cb95faf19ca'
            signature: 0x..
            public_key: 0x..
      required:
      - unsigned_tx
      - signatures
    ApiTxCompileRequestSolana:
      title: Api Tx Compile Request Solana
      type: object
      properties:
        unsigned_tx:
          type: string
          description: The transaction data needed to sign.
          example: AAEAAwYqxtWdFTb3/xrAW77tXSxoksrUwfWFAj5zub2JojTbnAnmeRNLj9i/bnMMVMh6QF5AP37ejGou8zrK1/IjTymqfYQGW/wgxXxux6CxGpqQkEbj0ZY3LYwYJuNSvOf8i/0Gp9UXGSxWjuCKhF9z0peIzwNcMUWyGrNE2AYuqUAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAwZGb+UhFzL/7K26csOb57yM5bvF9xJrLEObOkAAAACSA/HmJql7hyAMci43hBLdOCK44yJ2YmFxfit5l1C6ngMEAwEDAAQEAAAABAIAAgwCAAAAAOH1BQAAAAAFAAkDiBMAAAAAAAA=
          x-oapi-codegen-extra-tags:
            validate: required
        signatures:
          type: array
          items:
            $ref: '#/components/schemas/SolanaSignature'
          x-oapi-codegen-extra-tags:
            validate: required
          example:
          - signature: 4STXcD6nnpdPqM2AsJgxr4Wfbz4ihS7xQ5eCiQw2FUMTG7vqdr4TqomTrWsos4ZAjZbAr4vceEccUKTVWCn3jSs
      required:
      - unsigned_tx
      - signatures
    ApiTxCompileRequestTron:
      title: Api Tx Compile Request Tron
      type: object
      properties:
        unsigned_tx:
          type: string
          description: The protobuf hex encoded tron transaction
          x-oapi-codegen-extra-tags:
            validate: required
        signature:
          type: string
          description: A hex encoded string of the cryptographic signature.
          x-oapi-codegen-extra-tags:
            validate: required
        public_key:
          type: string
          description: The hex encoded public key of the signer
          x-oapi-codegen-extra-tags:
            validate: required
      required:
      - unsigned_tx
      - signature
      - public_key
    ApiTxCompileRequest:
      anyOf:
      - $ref: '#/components/schemas/ApiTxCompileRequestEVM'
      - $ref: '#/components/schemas/ApiTxCompileRequestStellar'
      - $ref: '#/components/schemas/ApiTxCompileRequestSubstrate'
      - $ref: '#/components/schemas/ApiTxCompileRequestBTC'
      - $ref: '#/components/schemas/ApiTxCompileRequestTron'
      - $ref: '#/components/schemas/ApiTxCompileRequestSolana'
      - $ref: '#/components/schemas/ApiTxCompileRequestNear'
      - $ref: '#/components/schemas/ApiTxCompileRequestCosmos'
    ApiTxCompileRequestSubstrate:
      title: Api Tx Compile Request Substrate
      type: object
      properties:
        unsigned_tx:
          type: string
          description: The hex encoded unsigned extrinsic
          x-oapi-codegen-extra-tags:
            validate: required
        signature:
          type: string
          description: A hex encoded string of the cryptographic signature.
          x-oapi-codegen-extra-tags:
            validate: required
        public_key:
          type: string
          description: The hex encoded public key
          x-oapi-codegen-extra-tags:
            validate: required
        signature_scheme:
          type: string
          enum:
          - ed25519
          - sr25519
          default: ed25519
      required:
      - unsigned_tx
      - signature
      - public_key
      - signature_scheme
    ApiTxCompileRequestCosmos:
      title: Api Tx Compile Request Cosmos
      type: object
      properties:
        unsigned_tx:
          type: string
          description: The transaction data needed to sign.
          x-oapi-codegen-extra-tags:
            validate: required
        signatures:
          type: array
          items:
            $ref: '#/components/schemas/CosmosSignature'
          x-oapi-codegen-extra-tags:
            validate: required,dive
      required:
      - unsigned_tx
      - signatures
    StellarSignature:
      type: object
      properties:
        signature:
          type: string
          description: A hex encoded string of the cryptographic signature.
          example: 0x..
          x-oapi-codegen-extra-tags:
            validate: required
        public_key:
          type: string
          description: A hex encoded string which is the public key for the address.
          example: 0x..
          x-oapi-codegen-extra-tags:
            validate: required
      required:
      - signature
      - public_key
    ApiTxSigned:
      type: object
      properties:
        tx:
          type: string
          description: The signed TX.
          example: 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
          x-oapi-codegen-extra-tags:
            validate: required
      required:
      - tx
    signature:
      type: object
      properties:
        address:
          type: string
          description: The hex address.
          example: '0x31c129468975e4ef41135a405000e6428a399a03d023b6627eed4cb95faf19ca'
          x-oapi-codegen-extra-tags:
            validate: required
        signature:
          type: string
          description: A hex encoded string of the cryptographic signature. ECDSA secp256k1 signatures are expected to be ASN1 encoded.
          example: 0x..
          x-oapi-codegen-extra-tags:
            validate: required
        public_key:
          type: string
          description: A hex encoded string which is the public key for the address.
          example: 0x..
          x-oapi-codegen-extra-tags:
            validate: required
      required:
      - address
      - signature
      - public_key
  responses:
    ErrorUnauthorized:
      description: Invalid or expired token
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/error'
          example:
            type: unauthorized
            title: Invalid Token
            status: 401
    ErrorInternal:
      description: An internal server error happened
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/error'
          example:
            type: internal-server-error
            title: Internal Server Error
            status: 500
    ErrorServiceUnavailable:
      description: The resource you are trying to access is currently unavailable
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/error'
          example:
            type: unavailable
            title: Unavailable
            status: 503
    ErrorTooManyRequests:
      description: Rate limit exceeded
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/error'
          example:
            type: too-many-requests
            title: Too Many Requests
            status: 429
            detail: Request rate limits have been exceeded. Try again after a few seconds.
    ErrorNotImplemented:
      description: The request endpoint is not implemented
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/error'
          example:
            type: not-implemented
            title: Not implemented
            status: 501
  securitySchemes:
    apiKeyAuthHeader:
      type: apiKey
      in: header
      name: X-API-Key
      description: 'Unlock higher TPS - Create your own API key in the [Blockdaemon App](https://app.blockdaemon.com).

        '
      x-default: 2go1YqUcuAr4WZ2-3WgSD3c7qpatZqQuNWhTVBldKZnTSUtw
    bearerAuth:
      type: http
      scheme: bearer
      bearerFormat: Opaque
      description: '[Legacy Auth] Unlock higher TPS - Create your own API key in the [Blockdaemon App](https://app.blockdaemon.com).

        '
      x-default: 2go1YqUcuAr4WZ2-3WgSD3c7qpatZqQuNWhTVBldKZnTSUtw
x-provenance:
  method: searched
  source: https://docs.blockdaemon.com/reference
  harvested: '2026-10-14'
  tool: harvest-readme-openapi.py
  note: Assembled verbatim from the OpenAPI definition ReadMe embeds in each operation page of the provider's developer portal; paths and components merged by API title, nothing authored.
  assembled_from:
  - https://docs.blockdaemon.com/reference/getoverview-txapi.md
  - https://docs.blockdaemon.com/reference/txcompile-txapi.md
  - https://docs.blockdaemon.com/reference/txcompileandsend-txapi.md
  - https://docs.blockdaemon.com/reference/txcreate-txapi.md
  - https://docs.blockdaemon.com/reference/txcreatetoken-txapi.md
  - https://docs.blockdaemon.com/reference/txdecode-txapi.md
  - https://docs.blockdaemon.com/reference/txderivesigningpayload.md
  - https://docs.blockdaemon.com/reference/txestimatefee-txapi.md
  - https://docs.blockdaemon.com/reference/txsend-txapi.md
  - https://docs.blockdaemon.com/reference/txverify-txapi.md
  merge:
    pages: 10
    deduped: 119
    conflicts_kept_first: 0