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MultiToken

1. Summary

MultiToken is a solidity library unifying ERC20, ERC721 & ERC1155 transfers by wrapping them into a MultiToken Asset struct.
  • Source code
  • ​NPM package​
    • If you want to use the MultiToken library in your solidity project you can install our NPM package.
    • Run: npm install @pwnfinance/multitoken

3. Contract Details

  • MultiToken.sol contract is written in Solidity version 0.8.0, but can be compiled with any solidity compiler version 0.8.*

Features

The library defines a token asset as a struct of token identifiers. It wraps transfer, allowance and balance check calls of the following token standards:
  • ERC20
  • ERC721
  • ERC1155
Unifying the function calls used within the PWN context, so we don't have to worry about handling these token standards individually.

Functions

transferAsset

Function for transfer calls on various token interfaces.
This function takes two arguments:
  • Asset memory_asset - Asset struct defining all necessary context of a token
  • address_dest - Destination address

transferAssetFrom

Function for transfer from calls on various token interfaces.
This function takes three arguments:
  • Asset memory_asset - Asset struct defining all necessary context of a token
  • address_source - Account/address that provided the allowance
  • address_dest - Destination address

balanceOf

Function for checking balances on various token interfaces.
This function takes two arguments:
  • Asset memory_asset - Asset struct defining all necessary context of a token
  • address_target - Target address to be checked

approveAsset

Function for approving calls on various token interfaces.
This function takes two arguments:
  • Asset memory_asset - Asset struct defining all necessary context of a token
  • address_target - Target address to be checked

Asset struct

Each asset is defined by the Asset struct and has the following properties:
Type
Name
Comment
address
assetAddress
Address of the token contract defining the asset
MultiToken.Category (category is described below)
category
Corresponding asset category
uint256
amount
Amount of fungible tokens or 0 -> 1
uint256
id
TokenID of an NFT or 0
A category is defined as an enum and can have values ERC20, ERC721 or ERC1155.

Events

MultiToken library does not define any events or custom errors.
Smart contracts - Previous
Token Bundler
Last modified 6mo ago