Error : ERC20: transfer amount exceeds balance

Smart Contracts
1 
contract TransferToken
{
    ERC20 public  Tokens;
    constructor(address _address) {
        Tokens = ERC20(_address);
    }
    function transfer(address recipient, uint256 amount) public {
        Tokens.approve(address(this), 10000);
        Tokens.allowance(msg.sender, address(this));
        Tokens.transferFrom(msg.sender, recipient, amount);
    }
}
1 Like
2

I am not understanding. Which is the aim of this contract?

3

You understood approve wrongly. Here's a simple example:

A - 100 tokens
B - 50 tokens
Smart contract (SC)

If A wants to transfer B 20 tokens, A can just do token.transfer(token, 20 * 10**decimals);.
If A wants to use the SC to transfer 20 tokens to B, A needs to do 2 things:

  1. A needs to interact with the token contract and call approve(SC.address, 20 * 10**decimals);
  2. in the SC's code, you can call token.transferFrom(A, B, 20*10**decimals);
2 Likes
4

hello mate , i tried with the SC like you referred but it is still showing the error.
I have updated the code

5

i just wanted to swap the tokens mate

6

@STYJ said another thing. You have to interact directly with the token contract and call there the APPROVE. You can't use a smartcontract to do this.
So search the token on bsc/etherscan and go on write section. On "approve" paste the TransferToken contract address on first field and on second field put the desired amount (with decimals)

7

yeah, that is working but it's just , my logic was to create the smart contract to ensure the token contract transaction ..

8

Unfortunately there is no way to approve from the contract. You should use a dapp

1 Like