Sign a Multisig Transaction

A web application may request Adena to sign a multisig transaction via the SignMultisigTransaction method. This method allows authorized signers to add their signature to an unsigned transaction. Each signer can download their signature file (.sig) to share with the transaction initiator for final broadcasting.

Note: Unlike the UI-based signing method where you upload .tx files, the injection method manages all transaction data through code.

Code

adena.SignMultisigTransaction(
  multisigDocument: MultisigTransactionDocument,
  multisigSignatures?: Signature[],
  withSaveFile?: boolean
)

Params

Key	Type	Description
multisigDocument	object	Multisig Transaction Document Model
multisigSignatures	Signature[]	Array of existing signatures (optional)
withSaveFile	boolean	Flag to automatically save the signature file (optional, default: false)

Multisig Transaction Document Model

Key	Type	Description
tx	RawTx	The raw transaction object containing messages, fees, signatures, and memo
chainId	string	The chain ID of the target blockchain (e.g., "staging", "portal-loop")
accountNumber	string	The account number of the multisig account
sequence	string	The sequence number of the multisig account

Signature Model

Key	Type	Description
pub_key	object	Public key object
pub_key.@type	string	Public key type (e.g., "/tm.PubKeySecp256k1")
pub_key.value	string	Base64-encoded public key
signature	string	Base64-encoded signature

Response

Key	Type	Description
code	number	Response code (success: 0)
status	string	Returns "success" or "failure"
type	string	Response type
message	string	Descriptive message of the result
data	object	Sign Multisig Transaction Result Model

Sign Multisig Transaction Result Model

Key	Type	Description
result	object	Result object containing multisig document and all signatures
result.multisigDocument	MultisigTransactionDocument	The original multisig transaction document
result.multisigSignatures	Signature[]	Array of all collected signatures
signature	Signature	The current signer's signature

Sample Request

await adena.SignMultisigTransaction({
  tx: {
    msg: [
      {
        "@type": "/bank.MsgSend",
        from_address: "g1ksdqtg675y28vkua8zrghxzlgwtpyxwklp5gpf",
        to_address: "g1jg8mtutu9khhfwc4nxmuhcpftf0pajdhfvsqf5",
        amount: "2ugnot"
      },
    ],
    fee: {
      gas_wanted: "6112955",
      gas_fee: "6113ugnot",
    },
    signatures: null,
    memo: "",
  },
  accountNumber: "6224",  // Replace it with the accountNumber of your multisig account.
  sequence: "1",          // Replace it with the sequence of your multisig account.
  chainId: "staging",     // Replace your target chainId
}, [], true);

Sample Response

{
  "code": 0,
  "status": "success",
  "type": "SIGN_MULTISIG_TRANSACTION_SUCCESS",
  "message": "Multisig transaction has been successfully signed.",
  "data": {
    "result": {
      "multisigDocument": {
        "tx": {
          "msg": [
            {
              "@type": "/bank.MsgSend",
              "from_address": "g1ksdqtg675y28vkua8zrghxzlgwtpyxwklp5gpf",
              "to_address": "g1jg8mtutu9khhfwc4nxmuhcpftf0pajdhfvsqf5",
              "amount": "2ugnot"
            }
          ],
          "fee": {
            "gas_wanted": "6112955",
            "gas_fee": "6113ugnot"
          },
          "signatures": null,
          "memo": ""
        },
        "accountNumber": "6224",
        "sequence": "1",
        "chainId": "staging"
      },
      "multisigSignatures": [
        {
          "pub_key": {
            "@type": "/tm.PubKeySecp256k1",
            "value": "A+FhNtsXHjLfSJk1lB8FbiL4mGPjc50Kt81J7EKDnJ2y"
          },
          "signature": "..."
        }
      ]
    },
    "signature": {
      "pub_key": {
        "@type": "/tm.PubKeySecp256k1",
        "value": "A+FhNtsXHjLfSJk1lB8FbiL4mGPjc50Kt81J7EKDnJ2y"
      },
      "signature": "..."
    }
  }
}