Sending a Transaction

Phantom supports singing transactions using the Partially Signed Bitcoin Transaction (PSBT) format. The signPSBT method takes in a serialized PSBT, and returns a serialized PSBT where the user’s inputs have been signed.

// function signature
signPSBT(
    psbt: Uint8Array,
    options: {inputsToSign: {sigHash?: number | undefined, address: string, signingIndexes: number[]}[]}
): Promise<Uint8Array>;

We recommend using bitcoinjs-lib for constructing and serializing PSBTs.

const fromHexString = (hexString) =>
  Uint8Array.from(hexString.match(/.{1,2}/g).map((byte) => parseInt(byte, 16)));

const signedPSBTBytes = await phantomProvider.signPSBT(
  fromHexString("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  {
    inputsToSign: [
      {
        address: "bc1qktymxhjtqt5tzc3k4ewq2sx094txqhksgy8hsw",
        signingIndexes: [0, 1, 3],
        sigHash: 0,
      },
    ],
  },
);