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  • Send btc: Tạo psbt sau đó kí bằng ví.

  • Demo:

    • Step 1: Generate psbt

      // Create psbt
const btcPsbt = new BtcPsbt(bitcoin.networks.testnet);

// Add inputs
const inputs: TxInput[] = [
   {
      hash: "6e7307c...0eddabbd", // prev ix id
      index: 1, // output index - 1,
      nonWitnessUtxo: Buffer.from("02000000000...36e0100000000", "hex") // prev tx hex
// // If this input was segwit, instead of nonWitnessUtxo,
// // you would add a witnessUtxo as follows. The scriptPubkey and the value only are needed.
    // witnessUtxo: {
    //   script: Buffer.from(
    //     '76a9148bbc...18d88ac', // ScriptPubKey
    //     'hex',
    //   ),
    //   value: 90000,
    // },
   }
]

// Add outputs
const outputs: TxOutput[] = [
    { address: 'tb1qkd5...szesvjf7', value: 100 }, // to address
    { address: 'tb1qqjmc...x4w4lgwsku0', value: 16250 } // from address - to pay fee (optional)
]

// Add memos
const newOpreturns: string[] = ["This is a new OpReturn message", "Another OpReturn message"];

// Update psbt
btcPsbt.updatePsbt(inputs, outputs, newOpreturns);

// Generated Psbt 
const updatedPsbtHex = btcPsbt.toHex();

      • View data in https://mempool.space/testnet/

        • hash: Previous tx id image

        • index: Output index - 1 image

        • nonWitnessUtxo: Buffer previous transaction hex image

        • witnessUtxo: scriptPubkey & value image

    • Step 2: Sign psbt ( https://docs.unisat.io/dev/unisat-developer-service/unisat-wallet#signpsbt )

      try {
   let res = await window.unisat.signPsbt( "70736274ff01007d....", {
      autoFinalized:false,
      toSignInputs:[
         {
            index: 0,
            address: "tb1q8h8....mjxzny",
         },
      ]  
   }
);
console.log(res)
} catch (e) {console.log(e)}

    • Step 3: Push psbt ( https://docs.unisat.io/dev/unisat-developer-service/unisat-wallet#pushpsbt )

      try {
   let res = await window.unisat.pushPsbt("70736274ff01007d....");
   console.log(res)
} catch (e) {
   console.log(e);
}

  • Debug: