How to transfer token to an address?

Question

Im using truffle and openzeppelin for issuing my ERC20 token. I already can add and buying the token, but still cannot transfer the token to another.

when i console.log the contract, it show me:

and i created front end for transfer

but i little bit confuse how to connected it to the contract to be able to transfering token to receiver address.

for now i just created function transfer like this:

transferToken() {
    let web3 = store.getState().web3.web3Instance
    const receiver = this.state.receipt_add
    const token_value = this.state.token_amount

    const token = contract(IYoToken)
      token.setProvider(web3.currentProvider)

    token.deployed().then(inst => {
        inst.transfer({
            to: receiver,
            amount: token_value
        })
    })
}

but its not working, and the error message is:

Answer 1

To execute a transfer of ERC20 tokens you have to execute the function transfer(address receiver, uint amount) from your token contract.

In javascript it should be something like

token.transfer(receiver, amount, { from: owner })

In your case this should work

transferToken() {
    let web3 = store.getState().web3.web3Instance
    const receiver = this.state.receipt_add
    const token_value = this.state.token_amount

    const token = contract(IYoToken)
    token.setProvider(web3.currentProvider)

    token.deployed().then(inst => {
        return inst.transfer(receiver,   // <----- ERC 20 token
            token_value,
            { from: token_owner })
    })
}

Answer 2

Apparently this.state.token_amount is invalid. It should be a number (integer). And maybe this.state.receipt_add is invalid too.

Answer 3

This error could also occur if the token amount is a big number. You need to include the big number library in your source code to resolve this issue. Once the library has been included you need to convert the token amount to a bignumber using the following statement in js

var x =new BigNumber(amount);

Replace the value of token amount in your transaction with x .Then the transaction should execute sussessfully.