Transfering ERC-20 in Hedera hashgraph

user_19543873 0
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I'm trying to write function which will be transfer erc-20 tokens in hedera hashgraph.

pragma solidity ^0.8.7;

import "@openzeppelin/contracts/token/ERC20/ERC20.sol";    
contract Coins is ERC20 {
        constructor(string memory name_, string memory symbol_)  ERC20(name_, symbol_) {
            _mint(msg.sender, 1000000000000000000000);
        }
    }

very simple solidity contract

then i deploy it in hedera

tx, err := hedera.NewContractCreateFlow().
        SetBytecode(bytecode).
        SetGas(1_000_000).
        SetConstructorParameters(
            hedera.NewContractFunctionParameters().
                AddString("Coins").
                AddString("coin"),
        ).
        Execute(client)

then i've trying to transfer some erc-20 tokens to other address

ps, _ := hedera.NewContractFunctionParameters().
    AddAddress(hedera.AccountID{Account: 34937758}.ToSolidityAddress())
ps.AddUint256(big.NewInt(1).Bytes())

contractExecTx, err := hedera.NewContractExecuteTransaction().
    SetContractID(newContractID).
    SetGas(1000000).
    SetFunction("transfer", ps).
    Execute(client)

and i got error StatusContractRevertExecuted (33)

is it possible to use ERC-20 tokens as a usual in Ethereum? or i have to use HTS only? is it possible to use solidity contract and register it as token in Hedera?

thank you so much

hedera-hashgraph solidity go
1 Answers

UPD: solution

looks like bytes for uint256 not compatible with hedera uint256 and big.NewInt(number).Bytes() is not working for hedera uint256

i've takes some abi lib

github.com/dcb9/go-ethereum/accounts/abi


AddUint256(abi.U256(big.NewInt(some number)))

and back to big.Int

query.GetUint256(0) // query for getting uint256

bInt := new(big.Int)
bInt.SetBytes(query.GetUint256(0))

and now it is works perfect

user_195438730
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