please add the func (g *GrpcClient) TRC20TransferFrom

[yangyile1990]

I use the sdk very happy.
While when I used the TRC20Approve and finish my job. I cannot find the TRC20TransferFrom. and I don't know how to use it without your sdk.
So. please implement the TRC20TransferFrom.
Thank you.

[daihaoxiaofei]

tx, err := Client.TRC20Send(from, to, contractAddress, amount.BigInt(), FeeLimit)

[alexchen01118]

tx, err := Client.TRC20Send(from, to, contractAddress, amount.BigInt(), FeeLimit)

this can't implement trc20TranferFrom

[Flipped199]

Have you solved your problem? should I use TriggerContract?

[robertchar92]

hi guys,
did you guys have find solution to use transferFrom?

[wxf4150]

gotron-sdk/pkg/client/trc20.go

Lines 170 to 179 in 1e82440

	func (g *GrpcClient) TRC20Send(from, to, contract string, amount *big.Int, feeLimit int64) (*api.TransactionExtention, error) {
	addrB, err := address.Base58ToAddress(to)
	if err != nil {
	return nil, err
	}
	ab := common.LeftPadBytes(amount.Bytes(), 32)
	req := trc20TransferMethodSignature + "0000000000000000000000000000000000000000000000000000000000000000"[len(addrB.Hex())-4:] + addrB.Hex()[4:]
	req += common.Bytes2Hex(ab)
	return g.TRC20Call(from, contract, req, false, feeLimit)
	}

ref above , i can get as trc20TranferFrom tx. it worked.

        addrA, err := address.Base58ToAddress(from)
	if err != nil {
		return nil, err
	}
	addrB, err := address.Base58ToAddress(to)
	if err != nil {
		return nil, err
	}
	contract := ueth.tokenAddressFromSymbol1(symbol, "TRON")


	amount :=big.NewInt(10000000) 
	ab := common.LeftPadBytes(amount.Bytes(), 32)
// 0x23b872dd is the erc20-transferFrom MethodSignature
	req := "0x23b872dd" +
		"0000000000000000000000000000000000000000000000000000000000000000"[len(addrA.Hex())-4:] + addrA.Hex()[4:] +
		"0000000000000000000000000000000000000000000000000000000000000000"[len(addrB.Hex())-4:] + addrB.Hex()[4:]
	req += common.Bytes2Hex(ab)
	
	//owner is who will sign the tx
	return Client.TRC20Call(owner, contract, req, false, 100000000)