[Question] Can I use sendToken function to transfer trc20 token? if not, how?

[tronprotocol]

[Question] Can I use sendToken function to transfer trc20 token? if not, how?

[StarLXL]

senToken function is used to create an unsigned TRC10 token transfer transaction.
If you want to create a TRC20 transfer transaction, use the triggersmartcontract function.
Please refer to this link for how to use it.
https://developers.tron.network/reference#triggersmartcontract

[EvanXzj]

@StarLXL Thank you for your reply！
I have write a demo like blew:

const privateKey = '5bcf9b39c69bf374c0441f06cfcd7b28a5ea6c6018c5eeace591f4db75e4dd01';
const tronWeb = new TronWeb({
    fullHost: 'https://api.shasta.trongrid.io',
});

const anthoerTronAddress = 'TX1mBCZSdXzggYcV16yEZ39L9wpF8eEmgo';
const isuuerAddres = 'TMPgjknWZsYJSmPjpY5V33qmKoruUqcYA3';
const contractAddress = 'TLdPQwEeTAaCfNrGRBhmxnScDmfZL2Perz';


async function main() {
    try {
        const parameter = [{ type: 'address', value: anthoerTronAddress }, { type: 'uint256', value: '10000000000000000' }];
        const options = {
            feeLimit: 100000000,
            callValue: 0,
        };

        const transaction = await tronWeb.transactionBuilder.triggerSmartContract(tronWeb.address.toHex(contractAddress), 'transfer(address,uint256)', options, parameter, tronWeb.address.toHex(isuuerAddres));
        if (!transaction.result || !transaction.result.result) {
            throw new Error('transaction crated failed');
        }

        const signedTransaction = await TronWeb.utils.crypto.signTransaction(privateKey, transaction.transaction);

        const broadcast = await tronWeb.trx.sendRawTransaction(signedTransaction);
    } catch (error) {
        console.log('Error', error);
    }
}

main();

It is ok if transfer a trc20 token from contract isuuerAddres to another anthoerTronAddress.
What if I want to transfer trc20 token between two non-issuer accounts, what triggerSmartContract function params should like?

I have tried change triggerSmartContract issuerAddress param to anthoerTronAddress.
when i Broadcast, i got an error:

[ { "apiRet": { "code": "SIGERROR", "message": "validate signature error b483c6900340d6ee838b08a54cb9a605cab087bfe5a0ca5b9d0c7da24a8f1f750af727100138bc7105202b86ee9e8b918af93172f7e479ab2620c71d63ec486100 is signed by TYEQ1Xc3ejLHnEPWa9YpH1jMWSHoNhW5t7 but it is not contained of permission.", "txid": "e747645a2716d9fb45210cab9255ff43928ccfac8dbbd024b20c72e80805665c" }, "broadcastTime": 1589513194, "id": 2 } ]

Is this function can only call by contract issuer?