ERC-20
Any contract that follows the ERC-20 standard is an ERC-20 token.
ERC-20 tokens provide functionalities to
- transfer tokens
- allow others to transfer tokens on behalf of the token holder
Here is the interface for ERC-20.
1interface IERC20 {
2 function totalSupply() external view returns (uint256);
3 function balanceOf(address account) external view returns (uint256);
4 function transfer(address recipient, uint256 amount)
5 external
6 returns (bool);
7 function allowance(address owner, address spender)
8 external
9 view
10 returns (uint256);
11 function approve(address spender, uint256 amount) external returns (bool);
12 function transferFrom(address sender, address recipient, uint256 amount)
13 external
14 returns (bool);
15}
1interface IERC20 {
2 function totalSupply() external view returns (uint256);
3 function balanceOf(address account) external view returns (uint256);
4 function transfer(address recipient, uint256 amount)
5 external
6 returns (bool);
7 function allowance(address owner, address spender)
8 external
9 view
10 returns (uint256);
11 function approve(address spender, uint256 amount) external returns (bool);
12 function transferFrom(address sender, address recipient, uint256 amount)
13 external
14 returns (bool);
15}
Example implementation of an ERC-20 token contract written in Rust.
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