EVM: Generate Signature

EVM chains like Ethereum, Polygon, BSC, Arbitrum, etc support the following signature kinds:

  • Transaction: Generates a fully signed transaction ready for broadcasting yourself.

  • Message: Generates a signature for an arbitrary message.

  • EIP712: Generates the signature for typed structured data defined in EIP-712.

  • Hash: Generates the signature for the hash digest of the original message.

Transaction Signature

Generates a fully signed transaction ready for broadcasting yourself.

Request body

Request body fieldsRequired/OptionalDescriptionType

kind

Required

Transaction

String

transaction

Required

The unsigned hex encoded transaction.

String

Sample request body

{
  "kind": "Transaction",
  "message": "0x02e783aa36a71503850d40e49def82520894e5a2ebc128e262ab1e3bd02bffbe16911adfbffb0180c0"
}

200 response example

{
    "id": "sig-39l22-xxxxx-xxxxxxxxxxxxxxxx",
    "walletId": "wa-19lns-xxxxx-xxxxxxxxxxxxxxxx",
    "network": "EthereumSepolia",
    "requester": {
        "userId": "us-3v1ag-xxxxx-xxxxxxxxxxxxxxxx",
        "tokenId": "to-7mkkj-xxxxx-xxxxxxxxxxxxxxxx",
        "appId": "ap-c831n-xxxxx-xxxxxxxxxxxxxxxx"
    },
    "requestBody": {
        "kind": "Transaction",
        "transaction": "0x02e783aa36a71603850cbab1770382520894e5a2ebc128e262ab1e3bd02bffbe16911adfbffb0180c0"
    },
    "status": "Signed",
    "signature": {
        "r": "0x05e365d4304eaa78516eb309bff91f8c12e5445a431e3f2428239678d0150c6c",
        "s": "0x47e0765c439fb42d57767910865d240964b7b09f2b2f74d8f14a63da7ce5a1fe",
        "recid": 0,
        "encoded": "0x05e365d4304eaa78516eb309bff91f8c12e5445a431e3f2428239678d0150c6c47e0765c439fb42d57767910865d240964b7b09f2b2f74d8f10000000000000000"
    },
    "signedData": "0x02f86a83aa36a71603850cbab1770382520894e5a2ebc128e262ab1e3bd02bffbe16911adfbffb0180c080a005e365d4304eaa78516eb309bff91f8c12e5445a431e3f2428239678d0150c6ca047e0765c439fb42d57767910865d240964b7b09f2b2f74d80000000000000000",
    "dateRequested": "2024-01-10T19:07:39.277Z",
    "dateSigned": "2024-01-10T19:07:40.533Z"
}

EthersJS SDK Sample:

See the full EthersJS docs here: https://docs.ethers.org/v6/

import { parseUnits, Transaction } from 'ethers'

const walletId = 'wa-6lbfv-9esgj-88s80c0qsih0a393'

const transaction = Transaction.from({
  to: '0xa238b6008Bc2FBd9E386A5d4784511980cE504Cd',
  value: '1',
  gasLimit: '21000',
  maxPriorityFeePerGas: parseUnits('5', 'gwei'),
  maxFeePerGas: parseUnits('20', 'gwei'),
  nonce: 3,
  type: 2,
  chainId: 11155111,
})

const res = await dfnsClient.wallets.generateSignature({
  walletId,
  body: { kind: 'Transaction', transaction: transaction.unsignedSerialized },
})

Message Signature

Generates a signature for an arbitrary message.

Request body

Request body fieldsRequired/OptionalDescriptionType

kind

Required

Message

String

message

Required

The original message hex encoded.

String

Sample request body

{
  "kind": "Message",
  "message": "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"
}

200 response example

{
  "id": "sig-2rv2t-u0cmd-xxxxxxxxxxxxxxxx",
  "walletId": "wa-1f04s-lqc9q-xxxxxxxxxxxxxxxx",
  "network": "KeyEdDSA",
  "requester": {
    "userId": "us-3v1ag-v6b36-xxxxxxxxxxxxxxxx",
    "tokenId": "to-7mkkj-c831n-xxxxxxxxxxxxxxxx",
    "appId": "ap-24vva-92s32-xxxxxxxxxxxxxxxx"
  },
  "requestBody": {
    "kind": "Message",
    "message": "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"
  },
  "status": "Signed",
    "signature": {
        "r": "0x05e365d4304eaa78516eb309bff91f8c12e5445a431e3f2428239678d0150c6c",
        "s": "0x47e0765c439fb42d57767910865d240964b7b09f2b2f74d8f14a63da7ce5a1fe",
        "recid": 0,
        "encoded": "0x05e365d4304eaa78516eb309bff91f8c12e5445a431e3f2428239678d0150c6c47e0765c439fb42d57767910865d240964b7b09f2b2f74d8f10000000000000000"
    },
  "dateRequested": "2023-05-15T20:21:11.576Z",
  "dateSigned": "2024-01-10T19:07:40.533Z"
}

EIP-712 TypedData Signature

Generates the signature for typed structured data defined in EIP-712, only applicable for EVM compatible blockchain networks.

Request body

fieldRequired/OptionalDescriptionType

kind

Required

Eip712

String

types

Required

Type definitions.

Map<String, TypedDataField[]>

domain

Required

Domain separator.

Eip712Domain

message

Required

Structured message to sign.

Object

TypedDataField

fieldRequired/OptionalDescriptionType

name

Required

Field name.

String

type

Required

Field type.

String

Eip712Domain

fieldRequired/OptionalDescriptionType

name

Optional

Name of the signing domain.

String

version

Optional

Current major version of the signing domain.

String

chainId

Optional

Chain ID.

Integer

verifyingContract

Optional

The address of the contract that will verify the signature.

String

salt

Optional

32-byte value as a last-resort domain separator.

String

Sample request body

{
  "kind": "Eip712",
  "types": {
    "Person": [
      { "name": "name", "type": "string" },
      { "name": "wallet", "type": "address" }
    ],
    "Mail": [
      { "name": "from", "type": "Person" },
      { "name": "to", "type": "Person" },
      { "name": "contents", "type": "string" }
    ]
  },
  "domain": {
    "name": "Ether Mail",
    "version": "1",
    "chainId": 1,
    "verifyingContract": "0x1b352de7a926ebd1bf52194dab487c2cb0793a9b",
    "salt": "0xf2d857f4a3edcb9b78b4d503bfe733db1e3f6cdc2b7971ee739626c97e86a558"
  },
  "message": {
    "from": {
      "name": "Chris",
      "wallet": "0x00e3495cf6af59008f22ffaf32d4c92ac33dac47"
    },
    "to": {
      "name": "Bob",
      "wallet": "0xcc0ee1a1c5e788b61916c8f1c96c960f9a9d3db7"
    },
    "contents": "Hello, Bob!"
  }
}

Response example

{
  "id": "sig-4tcfd-enph7-xxxxxxxxxxxxxxxx",
  "walletId": "wa-1f04s-lqc9q-xxxxxxxxxxxxxxxx",
  "network": "EthereumSepolia",
  "requester": {
    "userId": "us-3v1ag-v6b36-xxxxxxxxxxxxxxxx",
    "tokenId": "to-7mkkj-c831n-xxxxxxxxxxxxxxxx",
    "appId": "ap-24vva-92s32-xxxxxxxxxxxxxxxx"
  },
  "requestBody": {
    "kind": "Eip712",
    "types": {
      "Person": [
        {
          "name": "name",
          "type": "string"
        },
        {
          "name": "wallet",
          "type": "address"
        }
      ],
      "Mail": [
        {
          "name": "from",
          "type": "Person"
        },
        {
          "name": "to",
          "type": "Person"
        },
        {
          "name": "contents",
          "type": "string"
        }
      ]
    },
    "domain": {
      "name": "Ether Mail",
      "version": "1",
      "chainId": 1,
      "verifyingContract": "0x1b352de7a926ebd1bf52194dab487c2cb0793a9b",
      "salt": "0xf2d857f4a3edcb9b78b4d503bfe733db1e3f6cdc2b7971ee739626c97e86a558"
    },
    "message": {
      "from": {
        "name": "Chris",
        "wallet": "0x00e3495cf6af59008f22ffaf32d4c92ac33dac47"
      },
      "to": {
        "name": "Bob",
        "wallet": "0xcc0ee1a1c5e788b61916c8f1c96c960f9a9d3db7"
      },
      "contents": "Hello, Bob!"
    }
  },
  "status": "Signed",
  "signature": {
    "r": "0xb23c2cfb6d409f5a55ced08f89ae70f3fe89403a5ba907c367545499874f1c7f",
    "s": "0x49992f242a21ae0692c24b43393336744ddc08459d936b6a70542d79df4f66f0",
    "recid": 1,
    "encoded": "0xb23c2cfb6d409f5a55ced08f89ae70f3fe89403a5ba907c367545499874f1c7f49992f242a21ae0692c24b43393336744ddc08459d936b6a70542d79df4f66f01c"
  },
  "dateRequested": "2023-05-15T19:26:18.145Z"
}

Hash Signature

Generates the signature for the hash digest of the original message.

Request body

Request body fieldsRequired/OptionalDescriptionType

kind

Required

Hash

String

hash

Required

The hash digest in hex.

String

Sample request body

{
  "kind": "Hash",
  "hash": "031edd7d41651593c5fe5c006fa5752b37fddff7bc4e843aa6af0c950f4b9406"
}

200 response example

{
  "id": "sig-2ouaj-f4nq6-xxxxxxxxxxxxxxxx",
  "walletId": "wa-1f04s-lqc9q-xxxxxxxxxxxxxxxx",
  "network": "EthereumSepolia",
  "requester": {
    "userId": "us-3v1ag-v6b36-xxxxxxxxxxxxxxxx",
    "tokenId": "to-7mkkj-c831n-xxxxxxxxxxxxxxxx",
    "appId": "ap-24vva-92s32-xxxxxxxxxxxxxxxx"
  },
  "requestBody": {
    "kind": "Hash",
    "hash": "031edd7d41651593c5fe5c006fa5752b37fddff7bc4e843aa6af0c950f4b9406"
  },
  "status": "Signed",
    "signature": {
        "r": "0x05e365d4304eaa78516eb309bff91f8c12e5445a431e3f2428239678d0150c6c",
        "s": "0x47e0765c439fb42d57767910865d240964b7b09f2b2f74d8f14a63da7ce5a1fe",
        "recid": 0,
        "encoded": "0x05e365d4304eaa78516eb309bff91f8c12e5445a431e3f2428239678d0150c6c47e0765c439fb42d57767910865d240964b7b09f2b2f74d8f10000000000000000"
    },
  "dateRequested": "2023-05-15T20:21:11.576Z",
  "dateSigned": "2024-01-10T19:07:40.533Z"
}

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