right now, I know how to write tokenReceiver(deposit) contract, but new question: how to send token back to(withdraw) original contract ? I guess: _token.transfer(address recipient, uint256 amount)

Yeah, you are right, maybe you can have a try with a similar method safeTransfer

Hi @wade-liwei , As per @Skyge you could use SafeERC20 ( https://docs.openzeppelin.com/contracts/3.x/api/token/erc20#SafeERC20 ) (:pray: @skyge ) You would want to have Access Control so that only a privileged address could withdraw. :warning: The following code has not been tested nor audited. // S…

got it , thanks a lot. I will try the code.

contract StakingToken is ERC20, Ownable, Context, AccessControl { Compilation errors: contracts/StakingToken.sol:20:1: TypeError: Linearization of inheritance graph impossible contract StakingToken is ERC20, Ownable, Context, AccessControl { ^ (Relevant source part starts here and spans across m…

pragma solidity ^0.6.10; //pragma solidity ^0.5.0; import "openzeppelin-solidity/contracts/token/ERC20/ERC20.sol"; import "openzeppelin-solidity/contracts/token/ERC20/IERC20.sol"; import "openzeppelin-solidity/contracts/math/SafeMath.sol"; import "openzeppelin-solidity/contracts/access/Ownable.sol…

Hi @wade-liwei , The withdraw code I wrote uses AccessControl which is only in OpenZeppelin Contracts 3.x using Solidity 0.6. The token code you used is Solidity 0.5. It looks like your token is using Ownable, so you can use the onlyOwner to protect the withdraw function instead. Please note the …

I try the method, but deploy address call the method successfully. another address call the method failed. OpenZeppelin/openzeppelin-contracts/blob/master/contracts/token/ERC20/SafeERC20.sol#L22 * contract returns false). Tokens that return no value (and instead revert or * throw on failur…

Just like the comments said: https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/token/ERC20/SafeERC20.sol#L15 , you can use as below contract { using SafeERC20 for IERC20; function transferToken(IERC20 token, address to, uint256 amount) public { token.safeTr…

Request example of how to withdraw ERC20 token

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abcoathup Split this topic March 12, 2021, 3:46am 10

A post was split to a new topic: How to unstake busds

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Request example of how to withdraw ERC20 token

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