[Ethereum] Will contract selfdestruct also return tokens

erc-20selfdestructsoliditytokens

If I have tokens assigned to a smart contract, will "killing" the contract send leftover tokens to the owner of the contract? I know that remaining Ether stored in the contract is sent to owner in selfdestruct(owner), but what about tokens that are stored in the contract? It looks like I would have to manually right a function to disperse remaining tokens before self destruct, correct??

Best Answer

No

In your function that calls selfdestruct(owner), you would also need need to call the (ERC20) token's contract transfer function. The code would look like:

SomeToken tok = SomeToken(tokenAddress);
uint tokenBalance = tok.balanceOf(address(this));
tok.transfer(owner, tokenBalance);

Make sure that owner is an externally owned account (EOA) or a contract that can access the tokens.

Reminder to test thoroughly, that the tokens are transferred and that the owner can transfer the ETH and tokens it receives.

The other case is what @Ian mentions and if your contract issued tokens to people, and you selfdestruct the contract, people's tokens disappear: your contract was the ledger that recorded token balances and it disappeared.

Related Solutions

[Ethereum] How to Retrieve Remaining Tokens from ICO Contract

If your contract(s) are already deployed, you're out of luck.

On the other hand if you are still developing either the token or the crowdsale, there are a number of ways you can move the tokens around.

Firstly, the token balance on your crowd sale contract is just a value allocated within the token contract, so you can just have a function on your token contract allow you to directly reassign the balance from the crowd sale contract.

uint256 unsold = balances[saleaddress];
balances[saleaddress] = 0;
balances[someLocation] += unsold;

A better option perhaps, is to have the crowd sale contract handle it. In this case you can do something like

function withdrawUnsoldTokens()
{
    require(msg.sender == ownerAddress);
    ERC20 mytoken = new ERC20(tokenAddress);
    uint256 unsold = mytoken.balanceOf(this);
    mytoken.transfer(ownerAddress, unsold);
}

Best Answer

No

Related Solutions

[Ethereum] How to Retrieve Remaining Tokens from ICO Contract

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