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Sign transaction

post/api/v2/{coin}/signtx

This route is for users who would like to maintain their own keys, or otherwise would not like BitGo to decrypt their key, and instead provide it in the clear themselves

Path Parameters

  • coinstringRequired
    A cryptocurrency or token ticker symbol.
    Example: btc

Request Body

prv string
user private key
Example: xprv9s21ZrQH143K3xQwj4yx3fHjDieEdqFDweBvFxn28qGvfQGvweUWuUuDRpepDu6opq3jiWHU9h3yYTKk5vvu4ykRuGA4i4Kz1vmFMPLTsoC
txPrebuild object
wallet string
Example: 59cd72485007a239fb00282ed480da1f
Match pattern: ^[0-9a-f]{32}$
txHex string
Serialized transaction hex
txBase64 string
Serialized transaction base64 (applies to XLM only) The request must include this or a txHex
txInfoOne of
txInfo (UTXO)
feeInfo object
isLastSignature boolean
Should be set to true if you are signing the second time, attaching the final signature. Default to false.
pubs array[string]
Public Keys (user, backup, bitgo) for the wallet (UTXO coins only)
Example: ["string","string","string"]
javascript
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// Before signing we need to get a half-built transaction
const buildParams = { recipients: [{ amount: 0.01 * 1e8, address: '2NFfxvXpAWjKng7enFougtvtxxCJ2hQEMo4' }] };
bitgo
  .coin('tbtc4')
  .wallets()
  .get({ id: '5a9d9f8e1223833c4df673a07cf8bc5f' })
  .then(function (wallet) {
    wallet.prebuildTransaction(buildParams, function (err, result) {
      bitgo
        .coin('tbtc4')
        .signTransaction({ txPrebuild: result, prv: '<your xrpv>', pubs: ['<user xpub>', '<backup xpub>', '<bitgo xpub>'] })
        .then(function (transaction) {
          // print half-signed transaction hex
          console.dir(transaction);
        });
    });
  });

200 Response

txInfoOne of
txHex string
Serialized transaction hex
Example: 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