Signed Giveaways

This is a hardhat project, see https://hardhat.org

The main contract gives rewards in any ERC20, ERC721 or ERC1155 when the backend authorize it via message signing.

The message is composed of:

A list of signatures. If the contract holt too much value more than one signature is needed. Ideally the systems that sign must be independent.
A list of claim ids used by the backend to avoid double spending.
Expiration the expiration time of the message in unix timestamp. After the expiration the message cannot be used anymore.
From: usually the rewards must be transferred to the contract and this value is address(this), if a strategy with approve and transfer is used this is the address of the source.
To: the destination address that will get the rewards.
Claims: A list of union structs (ClaimEntry) that include: token type (ERC20, ERC721, ERC1155, etc), token address and a data field that depending on the token type may have: amount, tokenId, etc.

Usage

yarn hardhat help
yarn hardhat test
yarn hardhat coverage
REPORT_GAS=true yarn hardhat test
yarn hardhat markup

This package exports the contract source code, for deployments see: @sandbox-smart-contract/deploy package.