Router v2

SMBSwap is based on Uniswap v2. Read the Uniswap v2 documentation. For more in-depth information on the core contract logic, read the Uniswap v2 Core whitepaper.

Contract info

Contract name: SMBRouter

Binance smart chain Contract address: 0x009d611490eCfED2dC3F306231Bba7e7F3E9196E View the SMBSwap: Router v2 contract on BscScan.

Read functions

WETH

function WETH() external pure returns (address);

Returns the canonical address for Binance: WBNB token (WETH being a vestige from Ethereum network origins).

factory

function factory() external pure returns (address);

Returns the canonical address for SMBFactory.

For explanations of the following, view the Uniswap v2 Internal Functions documentation.

getAmountOut

function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) internal pure returns (uint amountOut);

getAmountIn

function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) internal pure returns (uint amountIn);

getAmountsOut

function getAmountsOut(uint amountIn, address[] memory path) internal view returns (uint[] memory amounts);

getAmountsIn

function getAmountsIn(uint amountOut, address[] memory path) internal view returns (uint[] memory amounts);

quote

function quote(uint amountA, uint reserveA, uint reserveB) internal pure returns (uint amountB);

Write functions

addLiquidity

function addLiquidity(
  address tokenA,
  address tokenB,
  uint amountADesired,
  uint amountBDesired,
  uint amountAMin,
  uint amountBMin,
  address to,
  uint deadline
) external returns (uint amountA, uint amountB, uint liquidity);

Adds liquidity to a BEP20⇄BEP20 pool.

NameTypeDescription

tokenA

address

The contract address of one token from your liquidity pair.

tokenB

address

The contract address of the other token from your liquidity pair.

amountADesired

uint

The amount of tokenA you'd like to provide as liquidity.

amountBDesired

uint

The amount of tokenA you'd like to provide as liquidity.

amountAMin

uint

The minimum amount of tokenA to provide (slippage impact).

amountBMin

uint

The minimum amount of tokenB to provide (slippage impact).

to

address

Address of LP Token recipient.

deadline

uint

Unix timestamp deadline by which the transaction must confirm.

addLiquidityETH

function addLiquidityETH(
  address token,
  uint amountTokenDesired,
  uint amountTokenMin,
  uint amountETHMin,
  address to,
  uint deadline
) external payable returns (uint amountToken, uint amountETH, uint liquidity);

Adds liquidity to a BEP20⇄WBNB pool.

NameType

addLiquidityETH

uint

The payable amount in BNB.

token

address

The contract address of the token to add liquidity.

amountTokenDesired

uint

The amount of the token you'd like to provide as liquidity.

amountTokenMin

uint

The minimum amount of the token to provide (slippage impact).

amountETHMin

uint

The minimum amount of BNB to provide (slippage impact).

to

address

Address of LP Token recipient.

deadline

uint

Unix timestamp deadline by which the transaction must confirm.

removeLiquidity

function removeLiquidity(
  address tokenA,
  address tokenB,
  uint liquidity,
  uint amountAMin,
  uint amountBMin,
  address to,
  uint deadline
) external returns (uint amountA, uint amountB);

Removes liquidity from a BEP20⇄BEP20 pool.

NameType

tokenA

address

The contract address of one token from your liquidity pair.

tokenB

address

The contract address of the other token from your liquidity pair.

liquidity

uint

The amount of LP Tokens to remove.

amountAMin

uint

The minimum amount of tokenA to remove (slippage impact).

amountBMin

uint

The minimum amount of tokenB to remove (slippage impact).

to

address

Address of LP Token recipient.

deadline

uint

Unix timestamp deadline by which the transaction must confirm.

removeLiquidityETH

function removeLiquidityETH(
  address token,
  uint liquidity,
  uint amountTokenMin,
  uint amountETHMin,
  address to,
  uint deadline
) external returns (uint amountToken, uint amountETH);

Removes liquidity from a BEP20⇄WBNB pool.

NameType

token

address

The contract address of the token to remove liquidity.

liquidity

uint

The amount of LP Tokens to remove.

amountTokenMin

uint

The minimum amount of the token to remove (slippage impact).

amountETHMin

uint

The minimum amount of BNB to remove (slippage impact).

to

address

Address of LP Token recipient.

deadline

uint

Unix timestamp deadline by which the transaction must confirm.

removeLiquidityETHSupportingFeeOnTransferTokens

function removeLiquidityETHSupportingFeeOnTransferTokens(
  address token,
  uint liquidity,
  uint amountTokenMin,
  uint amountETHMin,
  address to,
  uint deadline
) external returns (uint amountETH);

Removes liquidity from a BEP20⇄WBNB for tokens that take a fee on transfer.

NameType

token

address

The contract address of the token to remove liquidity.

liquidity

uint

The amount of LP Tokens to remove.

amountTokenMin

uint

The minimum amount of the token to remove (slippage impact).

amountETHMin

uint

The minimum amount of BNB to remove (slippage impact).

to

address

Address of LP Token recipient.

deadline

uint

Unix timestamp deadline by which the transaction must confirm.

removeLiquidityETHWithPermit

function removeLiquidityETHWithPermit(
  address token,
  uint liquidity,
  uint amountTokenMin,
  uint amountETHMin,
  address to,
  uint deadline,
  bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountToken, uint amountETH);

Removes liquidity from a BEP20⇄WBNB and receives BNB, without pre-approval, via permit.

NameType

token

address

The contract address of the token to remove liquidity.

liquidity

uint

The amount of LP Tokens to remove.

amountTokenMin

uint

The minimum amount of the token to remove (slippage impact).

amountETHMin

uint

The minimum amount of BNB to remove (slippage impact).

to

address

Address of LP Token recipient.

deadline

uint

Unix timestamp deadline by which the transaction must confirm.

approveMax

bool

Whether or not the approval amount in the signature is for liquidity or uint(-1).

v

uint8

The v component of the permit signature.

r

bytes32

The r component of the permit signature.

s

bytes32

The s component of the permit signature.

removeLiquidityETHWithPermitSupportingFeeOnTransferTokens

function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
  address token,
  uint liquidity,
  uint amountTokenMin,
  uint amountETHMin,
  address to,
  uint deadline,
  bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountETH);

Removes liquidity from a BEP20⇄WBNB and receives BNB via permit for tokens that take a fee on transfer.

NameType

token

address

The contract address of the token to remove liquidity.

liquidity

uint

The amount of LP Tokens to remove.

amountTokenMin

uint

The minimum amount of the token to remove (slippage impact).

amountETHMin

uint

The minimum amount of BNB to remove (slippage impact).

to

address

Address of LP Token recipient.

deadline

uint

Unix timestamp deadline by which the transaction must confirm.

approveMax

bool

Whether or not the approval amount in the signature is for liquidity or uint(-1).

v

uint8

The v component of the permit signature.

r

bytes32

The r component of the permit signature.

s

bytes32

The s component of the permit signature.

removeLiquidityWithPermit

function removeLiquidityWithPermit(
  address tokenA,
  address tokenB,
  uint liquidity,
  uint amountAMin,
  uint amountBMin,
  address to,
  uint deadline,
  bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountA, uint amountB);

Removes liquidity from a BEP20⇄BEP20, without pre-approval, via permit.

NameType

tokenA

address

The contract address of one token from your liquidity pair.

tokenB

address

The contract address of the other token from your liquidity pair.

liquidity

uint

The amount of LP Tokens to remove.

amountTokenMin

uint

The minimum amount of the token to remove (slippage impact).

amountETHMin

uint

The minimum amount of BNB to remove (slippage impact).

to

address

Address of LP Token recipient.

deadline

uint

Unix timestamp deadline by which the transaction must confirm.

approveMax

bool

Whether or not the approval amount in the signature is for liquidity or uint(-1).

v

uint8

The v component of the permit signature.

r

bytes32

The r component of the permit signature.

s

bytes32

The s component of the permit signature.

swapETHForExactTokens

function swapETHForExactTokens(uint amountOut, address[] calldata path, address to, uint deadline)
  external
  payable
  returns (uint[] memory amounts);

Receive an exact amount of output tokens for as little BNB as possible.

NameType

swapETHForExactTokens

uint

Payable BNB amount.

amountOut

uint

The amount tokens to receive.

path (address[])

address

An array of token addresses. path.length must be >= 2. Pools for each consecutive pair of addresses must exist and have liquidity.

to

address

Address of recipient.

deadline

uint

Unix timestamp deadline by which the transaction must confirm.

swapExactETHForTokens

function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline)
  external
  payable
  returns (uint[] memory amounts);

Receive as many output tokens as possible for an exact amount of BNB.

NameType

swapExactETHForTokens

uint

Payable BNB amount.

amountOutMin

uint

The minimum amount tokens to receive.

path (address[])

address

An array of token addresses. path.length must be >= 2. Pools for each consecutive pair of addresses must exist and have liquidity.

to

address

Address of recipient.

deadline

uint

Unix timestamp deadline by which the transaction must confirm.

swapExactETHForTokensSupportingFeeOnTransferTokens

function swapExactETHForTokensSupportingFeeOnTransferTokens(
  uint amountOutMin,
  address[] calldata path,
  address to,
  uint deadline
) external payable;

Receive as many output tokens as possible for an exact amount of BNB. Supports tokens that take a fee on transfer.

NameType

swapExactETHForTokensSupportingFeeOnTransferTokens

uint

Payable BNB amount.

amountOutMin

uint

The minimum amount tokens to receive.

path (address[])

address

An array of token addresses. path.length must be >= 2. Pools for each consecutive pair of addresses must exist and have liquidity.

to

address

Address of recipient.

deadline

uint

Unix timestamp deadline by which the transaction must confirm.

swapExactTokensForETH

function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline)
  external
  returns (uint[] memory amounts);

Receive as much BNB as possible for an exact amount of input tokens.

NameType

amountIn

uint

Payable amount of input tokens.

amountOutMin

uint

The minimum amount tokens to receive.

path (address[])

address

An array of token addresses. path.length must be >= 2. Pools for each consecutive pair of addresses must exist and have liquidity.

to

address

Address of recipient.

deadline

uint

Unix timestamp deadline by which the transaction must confirm.

swapExactTokensForETHSupportingFeeOnTransferTokens

function swapExactTokensForETHSupportingFeeOnTransferTokens(
  uint amountIn,
  uint amountOutMin,
  address[] calldata path,
  address to,
  uint deadline
) external;

Receive as much BNB as possible for an exact amount of tokens. Supports tokens that take a fee on transfer.

NameType

amountIn

uint

Payable amount of input tokens.

amountOutMin

uint

The minimum amount tokens to receive.

path (address[])

address

An array of token addresses. path.length must be >= 2. Pools for each consecutive pair of addresses must exist and have liquidity.

to

address

Address of recipient.

deadline

uint

Unix timestamp deadline by which the transaction must confirm.

swapExactTokensForTokens

function swapExactTokensForTokens(
  uint amountIn,
  uint amountOutMin,
  address[] calldata path,
  address to,
  uint deadline
) external returns (uint[] memory amounts);

Receive as many output tokens as possible for an exact amount of input tokens.

NameType

amountIn

uint

Payable amount of input tokens.

amountOutMin

uint

The minimum amount tokens to receive.

path (address[])

address

An array of token addresses. path.length must be >= 2. Pools for each consecutive pair of addresses must exist and have liquidity.

to

address

Address of recipient.

deadline

uint

Unix timestamp deadline by which the transaction must confirm.

swapExactTokensForTokensSupportingFeeOnTransferTokens

function swapExactTokensForTokensSupportingFeeOnTransferTokens(
  uint amountIn,
  uint amountOutMin,
  address[] calldata path,
  address to,
  uint deadline
) external;

Receive as many output tokens as possible for an exact amount of input tokens. Supports tokens that take a fee on transfer.

NameType

amountIn

uint

Payable amount of input tokens.

amountOutMin

uint

The minimum amount tokens to receive.

path (address[])

address

An array of token addresses. path.length must be >= 2. Pools for each consecutive pair of addresses must exist and have liquidity.

to

address

Address of recipient.

deadline

uint

Unix timestamp deadline by which the transaction must confirm.

swapTokensForExactETH

function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline)
  external
  returns (uint[] memory amounts);

Receive an exact amount of ETH for as few input tokens as possible.

NameType

amountOut

uint

Payable amount of input tokens.

amountInMax

uint

The minimum amount tokens to input.

path (address[])

address

An array of token addresses. path.length must be >= 2. Pools for each consecutive pair of addresses must exist and have liquidity.

to

address

Address of recipient.

deadline

uint

Unix timestamp deadline by which the transaction must confirm.

swapTokensForExactTokens

function swapTokensForExactTokens(
  uint amountOut,
  uint amountInMax,
  address[] calldata path,
  address to,
  uint deadline
) external returns (uint[] memory amounts);

Receive an exact amount of output tokens for as few input tokens as possible.

NameType

amountOut

uint

Payable amount of input tokens.

amountInMax

uint

The maximum amount tokens to input.

path (address[])

address

An array of token addresses. path.length must be >= 2. Pools for each consecutive pair of addresses must exist and have liquidity.

to

address

Address of recipient.

deadline

uint

Unix timestamp deadline by which the transaction must confirm.

Interface

import '@uniswap/v2-core/contracts/interfaces/ISMBRouter.sol';
pragma solidity >=0.6.2;

interface ISMBRouter01 {
    function factory() external pure returns (address);
    function WETH() external pure returns (address);

    function addLiquidity(
        address tokenA,
        address tokenB,
        uint amountADesired,
        uint amountBDesired,
        uint amountAMin,
        uint amountBMin,
        address to,
        uint deadline
    ) external returns (uint amountA, uint amountB, uint liquidity);
    function addLiquidityETH(
        address token,
        uint amountTokenDesired,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline
    ) external payable returns (uint amountToken, uint amountETH, uint liquidity);
    function removeLiquidity(
        address tokenA,
        address tokenB,
        uint liquidity,
        uint amountAMin,
        uint amountBMin,
        address to,
        uint deadline
    ) external returns (uint amountA, uint amountB);
    function removeLiquidityETH(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline
    ) external returns (uint amountToken, uint amountETH);
    function removeLiquidityWithPermit(
        address tokenA,
        address tokenB,
        uint liquidity,
        uint amountAMin,
        uint amountBMin,
        address to,
        uint deadline,
        bool approveMax, uint8 v, bytes32 r, bytes32 s
    ) external returns (uint amountA, uint amountB);
    function removeLiquidityETHWithPermit(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline,
        bool approveMax, uint8 v, bytes32 r, bytes32 s
    ) external returns (uint amountToken, uint amountETH);
    function swapExactTokensForTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external returns (uint[] memory amounts);
    function swapTokensForExactTokens(
        uint amountOut,
        uint amountInMax,
        address[] calldata path,
        address to,
        uint deadline
    ) external returns (uint[] memory amounts);
    function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline)
        external
        payable
        returns (uint[] memory amounts);
    function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline)
        external
        returns (uint[] memory amounts);
    function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline)
        external
        returns (uint[] memory amounts);
    function swapETHForExactTokens(uint amountOut, address[] calldata path, address to, uint deadline)
        external
        payable
        returns (uint[] memory amounts);

    function quote(uint amountA, uint reserveA, uint reserveB) external pure returns (uint amountB);
    function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) external pure returns (uint amountOut);
    function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) external pure returns (uint amountIn);
    function getAmountsOut(uint amountIn, address[] calldata path) external view returns (uint[] memory amounts);
    function getAmountsIn(uint amountOut, address[] calldata path) external view returns (uint[] memory amounts);
}

// File: contracts\interfaces\ISMBRouter02.sol

pragma solidity >=0.6.2;

interface ISMBRouter02 is ISMBRouter01 {
    function removeLiquidityETHSupportingFeeOnTransferTokens(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline
    ) external returns (uint amountETH);
    function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline,
        bool approveMax, uint8 v, bytes32 r, bytes32 s
    ) external returns (uint amountETH);

    function swapExactTokensForTokensSupportingFeeOnTransferTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external;
    function swapExactETHForTokensSupportingFeeOnTransferTokens(
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external payable;
    function swapExactTokensForETHSupportingFeeOnTransferTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external;
}

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