USDT 转账

index.html 中引入  

离线签名代码是参照 的这位博主  https://blog.csdn.net/jiang_xinxing/article/details/85162829

function usdtSign(privateKey, utxo, feeValue, usdtValue, fromAddress, toAddress) {
	let bitcoin = bitcoinjs.bitcoin;
	var txb = new bitcoin.TransactionBuilder();
	const testnet = bitcoin.networks.bitcoin;
	var set = bitcoin.ECPair.fromWIF(privateKey,testnet);
//	const fundValue = 546;//如果需要每笔交易附带btc转账数量，可以设置这个参数
	var feeValue = parseInt(feeValue * 1e8);//交易费用，可自行设置调节
	var usdtAmount = parseInt(usdtValue * 1e8).toString(16);//usdt转账数量
	var totalUnspent = 0;
	for(var i = 0; i < utxo.length; i++) {
		totalUnspent = totalUnspent + utxo[i].value;//计算未花费的btc总数量
	}
//	const changeValue = totalUnspent - fundValue - (feeValue);
//	if(totalUnspent < feeValue+fundValue) {
	const changeValue = totalUnspent - (feeValue);
	if(totalUnspent < feeValue) {
		_this.$layer.open({
			content: "BTC 数量不足",
			skin: 'msg',
			time: 3
		});
	    _this.$layer.close(_this.ajaxLoading)
		return false;
	}
	for(var i = 0; i < utxo.length; i++) {
		txb.addInput(utxo[i].tx_hash_big_endian, utxo[i].tx_output_n, 0xfffffffe);
	}
	const usdtInfo = [
	    "6f6d6e69",
		"0000",
		"00000000001f",
		addPreZero(usdtAmount)
	].join('');
	const data = Buffer.from(usdtInfo, "hex");
	const omniOutput = bitcoin.script.compile([
		bitcoin.opcodes.OP_RETURN,
		data
	]);
//    txb.addOutput(toAddress, fundValue);
	txb.addOutput(omniOutput, 0);
	txb.addOutput(fromAddress, changeValue);
	for(var i = 0; i < utxo.length; i++) {
		txb.sign(i, set);
	}
	return txb.buildIncomplete().toHex();
};
				

 

function addPreZero(num){
    var t = (num+'').length,
        s = '';
    for(var i=0; i<16-t; i++){
        s += '0';
    }
    return s+num;
}

BTC UTXO通过这个第三方接口获取

 $.get('https://blockchain.info/unspent?active='+this.account).then(res => {
	var utxo = res.unspent_outputs//未花费过的交易输出
	var privateKey = this.privateKey;//私钥
	var usdtValue = this.money;//转账usdt数量
	var feeValue = this.freeBTC;//btc手续费
	var fromAddress = this.account;//转账地址
	var toAddress = this.address;//收款地址
	var sign = usdtSign(privateKey, utxo, feeValue, usdtValue, fromAddress, toAddress);
		if(sign) {
        //广播交易
		$.get('https://api.omniexplorer.info/v1/transaction/pushtx/' + sign).then(response => {
			console.log(response)
          })
       }
   }).catch(err => {
         console.log(err)
   })