IERC20.sol

This file defines the interface of the ERC20 standard as defined in the EIP. It includes functions for transferring tokens, checking balances, and setting allowances. It also emits events for token transfers and approvals.

IERC20

The IERC20 interface defines the standard functions that a ERC20 token contract should implement.

totalSupply

function totalSupply() external view returns (uint256)

Returns the total supply of tokens in existence.

Return Values

• uint256: The total supply of tokens.

balanceOf

function balanceOf(address account) external view returns (uint256)

Returns the amount of tokens owned by account.

Parameters

• account address: The address of the account.

Return Values

• uint256: The amount of tokens owned by the account.

transfer

function transfer(address recipient, uint256 amount) external returns (bool)

Transfers amount tokens from the caller's account to recipient.

Parameters

• recipient address: The address of the recipient.
• amount uint256: The amount of tokens to transfer.

Return Values

• bool: A boolean indicating whether the operation succeeded.

allowance

function allowance(address owner, address spender) external view returns (uint256)

Returns the remaining number of tokens that spender can spend on behalf of owner.

Parameters

• owner address: The address of the owner.
• spender address: The address of the spender.

Return Values

• uint256: The remaining number of tokens that the spender can spend.

approve

function approve(address spender, uint256 amount) external returns (bool)

Sets amount as the allowance of spender over the caller's tokens.

Parameters

• spender address: The address of the spender.
• amount uint256: The amount of tokens to approve.

Return Values

• bool: A boolean indicating whether the operation succeeded.

transferFrom

function transferFrom(address sender, address recipient, uint256 amount) external returns (bool)

Transfers amount tokens from sender to recipient using the allowance mechanism.

Parameters

• sender address: The address of the sender.
• recipient address: The address of the recipient.
• amount uint256: The amount of tokens to transfer.

Return Values

• bool: A boolean indicating whether the operation succeeded.