DISCLAIMER: Please do not use in production without taking the appropriate steps to ensure maximum security.
WARNING: Unlike other similar libraries, this library does NOT REVERT ON FAILURES. Any contracts that inherit this code that expect the reversion to occur in this contract can have UNINTENDED AND POTENTIALLY CATASTROPHIC CONSEQUENCES.
ERC20Helper is a basic library designed to be used as a middleware between general smart contracts and diverse ERC-20 tokens. It standardizes the behaviours of all commonly used implementations.
The decision to intentionally not revert was so that this library can be more flexible for contracts that:
- Want to choose their own revert strings, or none at all (i.e.
require(ERC20Helper.transfer(asset, msg.sender, amount), "FOO:FAILED_TRANSFER");). - Want to use the returns as booleans (i.e.
require(ERC20Helper.transfer(asset1, msg.sender, amount) || ERC20Helper.transfer(asset2, msg.sender, amount));). - Do not care about the result of a transfer.
This project was built using dapptools.
git clone git@github.com:maple-labs/erc20-helper.git
cd erc20-helper
dapp update- To run all tests:
make test(runs./test.sh) - To run a specific test function:
./test.sh -t <test_name>(e.g.,./test.sh -t test_fundLoan)
| Auditor | Report link |
|---|---|
| Trail of Bits | ToB - Dec 28, 2021 |
| Code 4rena | C4 - Jan 5, 2022 |
| Trail of Bits | ToB Report - April 12, 2022 |
| Code 4rena | C4 Report - April 20, 2022 |
For all information related to the ongoing bug bounty for these contracts run by Immunefi, please visit this site.
These contracts were inspired by and/or directly modified from the following sources:
