ETC Swap Protocol Documentation
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Pair (ERC-20)

This documentation covers ERC-20 functionality for denominating pool tokens. For Uniswap-specific functionality, see Pair.

Code

Events

Approval​​

event Approval(address indexed owner, address indexed spender, uint value);
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Emitted each time an approval occurs via approve or permit.

Transfer​​

event Transfer(address indexed from, address indexed to, uint value);
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Emitted each time a transfer occurs via transfer, transferFrom, mint, or burn.

Read-Only Functions

name​​

function name() external pure returns (string memory);
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Returns Uniswap V2 for all pairs.

symbol​​

function symbol() external pure returns (string memory);
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Returns UNI-V2 for all pairs.

decimals​​

function decimals() external pure returns (uint8);
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Returns 18 for all pairs.

totalSupply​​

function totalSupply() external view returns (uint);
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Returns the total amount of pool tokens for a pair.

balanceOf​​

function balanceOf(address owner) external view returns (uint);
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Returns the amount of pool tokens owned by an address.

allowance​​

function allowance(address owner, address spender) external view returns (uint);
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Returns the amount of liquidity tokens owned by an address that a spender is allowed to transfer via transferFrom.

DOMAIN_SEPARATOR​​

function DOMAIN_SEPARATOR() external view returns (bytes32);
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Returns a domain separator for use in permit.

PERMIT_TYPEHASH​​

function PERMIT_TYPEHASH() external view returns (bytes32);
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Returns a typehash for use in permit.

nonces​​

function nonces(address owner) external view returns (uint);
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Returns the current nonce for an address for use in permit.

State-Changing Functions

approve​​

function approve(address spender, uint value) external returns (bool);
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Lets msg.sender set their allowance for a spender.

transfer​​

function transfer(address to, uint value) external returns (bool);
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Lets msg.sender send pool tokens to an address.

transferFrom​​

function transferFrom(address from, address to, uint value) external returns (bool);
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Sends pool tokens from one address to another.

permit​​

function permit(address owner, address spender, uint value, uint deadline, uint8 v, bytes32 r, bytes32 s) external;
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Sets the allowance for a spender where approval is granted via a signature.

Interface

import '@uniswap/v2-core/contracts/interfaces/IUniswapV2ERC20.sol';
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pragma solidity >=0.5.0;interface IUniswapV2ERC20 { event Approval(address indexed owner, address indexed spender, uint value); event Transfer(address indexed from, address indexed to, uint value); function name() external pure returns (string memory); function symbol() external pure returns (string memory); function decimals() external pure returns (uint8); function totalSupply() external view returns (uint); function balanceOf(address owner) external view returns (uint); function allowance(address owner, address spender) external view returns (uint); function approve(address spender, uint value) external returns (bool); function transfer(address to, uint value) external returns (bool); function transferFrom(address from, address to, uint value) external returns (bool); function DOMAIN_SEPARATOR() external view returns (bytes32); function PERMIT_TYPEHASH() external pure returns (bytes32); function nonces(address owner) external view returns (uint); function permit(address owner, address spender, uint value, uint deadline, uint8 v, bytes32 r, bytes32 s) external;}
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ABI

import IUniswapV2ERC20 from '@uniswap/v2-core/build/IUniswapV2ERC20.json'
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Last modified 10mo ago