feat(hw-app-trx): support #signTIP712HashedMessage() for Tron

[zorro11639]

✅ Checklist

• npx changeset was attached.
• Covered by automatic tests.
• Impact of the changes:
  • hw-app-trx will support TIP712 Signing

📝 Description

Adding the support of TIP712 Signing to hw-app-trx

📸 Demo

var  AppTrx = require("@ledgerhq/hw-app-trx").default;
var Transport = require("@ledgerhq/hw-transport-node-hid").default;
var ethers = require("ethers")

function isHexChar(c) {
    if ((c >= 'A' && c <= 'F') ||
        (c >= 'a' && c <= 'f') ||
        (c >= '0' && c <= '9')) {
        return 1;
    }

    return 0;
}

function hexChar2byte(c) {
    let d;

    if (c >= 'A' && c <= 'F')
        d = c.charCodeAt(0) - 'A'.charCodeAt(0) + 10;
    else if (c >= 'a' && c <= 'f')
        d = c.charCodeAt(0) - 'a'.charCodeAt(0) + 10;
    else if (c >= '0' && c <= '9')
        d = c.charCodeAt(0) - '0'.charCodeAt(0);

    if (typeof d === 'number')
        return d;
    else
        throw new Error('The passed hex char is not a valid hex char');
}
function hexStr2byteArray(str, strict = false) {
    if (typeof str !== 'string')
        throw new Error('The passed string is not a string')

    let len = str.length;

    if (strict) {
        if (len % 2) {
            str = `0${str}`;
            len++;
        }
    }
    const byteArray = Array();
    let d = 0;
    let j = 0;
    let k = 0;

    for (let i = 0; i < len; i++) {
        const c = str.charAt(i);

        if (isHexChar(c)) {
            d <<= 4;
            d += hexChar2byte(c);
            j++;

            if (0 === (j % 2)) {
                byteArray[k++] = d;
                d = 0;
            }
        } else
            throw new Error('The passed hex char is not a valid hex string')
    }

    return byteArray;
}

async function verifySignature(addr, domainSeparatorHex, hashStructMessageHex, signature){
    const SIGN_MAGIC = '\x19\x01'
    domainSeparatorHex = domainSeparatorHex.replace(/^0x/, '');
    hashStructMessageHex = hashStructMessageHex.replace(/^0x/, '')
    signature = signature.replace(/^0x/, '');
    const messageBytes = [
        ...ethers.utils.toUtf8Bytes(SIGN_MAGIC),
        ...hexStr2byteArray(domainSeparatorHex),
        ...hexStr2byteArray(hashStructMessageHex)
    ];


    const messageDigest = ethers.utils.keccak256(messageBytes);

    const recovered = ethers.utils.recoverAddress(messageDigest, {
        recoveryParam: signature.substring(128, 130) == '1c' ? 1 : 0,
        r: '0x' + signature.substring(0, 64),
        s: '0x' + signature.substring(64, 128)
    });

    const tronAddress = "41" + recovered.substr(2);
    const base58Address = tronWeb.address.fromHex(tronAddress);
    return base58Address == addr;
}
async function SignTIP712MessageDemo(){
    var transport = await Transport.create();
    var tronApp = new AppTrx(transport);

    const domain = "0101010101010101010101010101010101010101010101010101010101010101"
    const struct = "0202020202020202020202020202020202020202020202020202020202020202"
    const path = "44'/195'/0'/0/0"
    const result = await tronApp.getAddress(path)
    const addr = result["address"]
    console.log("Ledger Address:" + addr)
    tronApp.signTIP712HashedMessage(path, Buffer.from(domain,"hex").toString("hex"), Buffer.from(struct, "hex").toString("hex")).then(signature => {
        console.log("Signature 0x" + signature);
        const verifyRet = verifySignature(addr, domain, struct, signature)
        console.log(verifyRet)
    })
}

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