V2 Functions

Get Liquidity Information

getPair

function getPair(
    address tokenA,
    address tokenB,
).call()

• Description: Get the liquidity pool address

• Contract called: Factory

• Parameters:

Parameter Name	Type	Description
tokenA	address	The address of tokenA
tokenB	address	The address of tokenB

• Return value: Pool address

• Example: Query the pool address for TRX/USDT

const factory_v2 = await tronWeb.contract(V2factoryAbi, config.nile.v2Factory)
const pairaddress_ = await factory_v2.getPair(config.nile.wtrxToken, config.nile.usdtToken).call()
console.log(tronWeb.address.fromHex(pairaddress_))

• Return

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Add/Remove Liquidity

addLiquidity

function addLiquidity(
    address tokenA,
    address tokenB,
    uint256 amountADesired,
    uint256 amountBDesired,
    uint256 amountAMin,
    uint256 amountBMin,
    address to,
    uint256 deadline,
).send()

• Description: Add liquidity (tokenA and tokenB do not include TRX)

• Contract called: Router

• Parameters:

Parameter Name	Type	Description
tokenA	address	The address of tokenA
tokenB	address	The address of tokenB
amountADesired	uint256	The desired amount of tokenA to add
amountBDesired	uint256	The desired amount of tokenB to add
amountAMin	uint256	The minimum amount of tokenA to add
amountBMin	uint256	The minimum amount of tokenB to add
to	address	The recipient of the liquidity tokens
deadline	uint256	Unix timestamp after which the transaction will revert

• Return value: hash

• Example: Add liquidity to the TUSD/USDT pool

const swap_v2 = await tronWeb.contract(V2RouterAbi, config.nile.routerV2)
const addLiquidity_t = await swap_v2.addLiquidity(config.nile.usdtToken, config.nile.tusdToken, 25000000, 1000000000000000, 1, 1, "TXXXXXXXXXXXXXXXXXXXX",Math.floor(Date.now() / 1000 + 86400)).send()
console.log(addLiquidity_t)

addLiquidityETH

function addLiquidityETH(
    address token,
    uint256 amountTokenDesired,
    uint256 amountTokenMin,
    uint256 amountETHMin,
    address to,
    uint256 deadline,
).send()

• Description: Add liquidity (One of the tokens is TRX)

• Contract called: Router

• Parameters:

Parameter Name	Type	Description
token	address	The address of the token to add liquidity for
amountTokenDesired	uint256	The desired amount of token to add
amountTokenMin	uint256	The minimum amount of token to add
amountETHMin	uint256	The minimum amount of TRX to add
to	address	The recipient of the liquidity tokens
deadline	uint256	Unix timestamp after which the transaction will revert

• Return value: hash

• Example: Add liquidity to the TRX/USDT pool

const swap_v2 = await tronWeb.contract(V2RouterAbi, config.nile.routerV2)
const addLiquidityETH_t = await swap_v2.addLiquidityETH(config.nile.usdtToken, 100, 1, 1, "TXXXXXXXXXXXXXXXXXXX",Math.floor(Date.now() / 1000 + 86400)).send({callValue:1000000})
console.log(addLiquidityETH_t)

removeLiquidity

function removeLiquidity(
    address tokenA,
    address tokenB,
    uint256 liquidity,
    uint256 amountAMin,
    uint256 amountBMin,
    address to,
    uint256 deadline,
).send()

• Description: Remove liquidity (tokenA and tokenB do not include TRX)

• Contract called: Router

• Parameters:

Parameter Name	Type	Description
tokenA	address	The address of tokenA
tokenB	address	The address of tokenB
liquidity	uint256	The amount of liquidity tokens to remove
amountAMin	uint256	The minimum amount of tokenA to receive
amountBMin	uint256	The minimum amount of tokenB to receive
to	address	The recipient of the tokens
deadline	uint256	Unix timestamp after which the transaction will revert

• Return value: hash

• Example: Remove liquidity from the TUSD/USDT pool

const swap_v2 = await tronWeb.contract(V2RouterAbi, config.nile.routerV2)
const removeLiquidity_t = await swap_v2.removeLiquidity(config.nile.usdtToken,config.nile.tusdToken, 1, 1, 1, "TXXXXXXXXXXXXXXXXXXXX",Math.floor(Date.now() / 1000 + 86400)).send()
console.log(removeLiquidity_t)

removeLiquidityETH

function removeLiquidityETH(
    address token,
    uint256 liquidity,
    uint256 amountTokenMin,
    uint256 amountETHMin,
    address to,
    uint256 deadline,
).send()

• Description: Remove liquidity (One of the tokens is TRX)

• Contract called: Router

• Parameters:

Parameter Name	Type	Description
token	address	The address of the token to remove liquidity for
liquidity	uint256	The amount of liquidity tokens to remove
amountTokenMin	uint256	The minimum amount of token to receive
amountETHMin	uint256	The minimum amount of TRX to receive
to	address	The recipient of the tokens
deadline	uint256	Unix timestamp after which the transaction will revert

• Return value: hash

• Example: Remove liquidity from the TRX/USDT pool

const swap_v2 = await tronWeb.contract(V2RouterAbi, config.nile.routerV2)
const removeLiquidityETH_t = await swap_v2.removeLiquidityETH(config.nile.usdtToken,1, 1, 1, "TXXXXXXXXXXXXXXXXXXXX",Math.floor(Date.now() / 1000 + 86400)).send()
console.log(removeLiquidityETH_t)

Execute Swap

swapExactTokensForTokens

function swapExactTokensForTokens(
    uint256 amountIn,
    uint256 amountOutMin,
    address[] path,
    address to,
    uint256 deadline,
).send()

• Description: Sell Token to Buy Token

• Contract Called: Router

• Parameters:

Parameter Name	Type	Description
amountIn	uint256	The amount of input tokens to send
amountOutMin	uint256	The minimum amount of output tokens to receive
path	address[]	An array of token addresses, ordered from input to output
to	address	The recipient of the output tokens
deadline	uint256	Unix timestamp after which the transaction will revert

• Return value: hash

• Example: Sell USDT to Buy SUN

const swap_v2 = await tronWeb.contract(V2RouterAbi, config.nile.routerV2)
const swapExactTokensForTokens_t = await swap_v2.swapExactTokensForTokens(20000000, 0, [config.nile.usdtToken, config.nile.sunToken], "TXXXXXXXXXXXXXXXXXXX", Math.floor(Date.now() / 1000 + 86400)).send()
console.log(swapExactTokensForTokens_t)

swapExactETHForTokens

function swapExactETHForTokens(
    uint256 amountOutMin,
    address[] path,
    address to,
    uint256 deadline,
).send()

• Description: Sell TRX to Buy Token

• Contract Called: Router

• Parameters:

Parameter Name	Type	Description
amountOutMin	uint256	The minimum amount of output tokens to receive
path	address[]	An array of token addresses, ordered from input (WTRX) to output
to	address	The recipient of the output tokens
deadline	uint256	Unix timestamp after which the transaction will revert

• Return value: hash

• Example: Sell TRX to Buy USDT

const swap_v2 = await tronWeb.contract(V2RouterAbi, config.nile.routerV2)
const swapExactETHForTokens_t = await swap_v2.swapExactETHForTokens(1, [config.nile.wtrxToken, config.nile.usdtToken], "TXXXXXXXXXXXXXXXXXXXX", Math.floor(Date.now() / 1000 + 86400)).send({callValue:1000000})
console.log(swapExactETHForTokens_t)

swapExactTokensForETH

function swapExactTokensForETH(
    uint256 amountIn,
    uint256 amountOutMin,
    address[] path,
    address to,
    uint256 deadline,
).send()

• Description: Sell Token to Buy TRX

• Contract Called: Router

• Parameters:

Parameter Name	Type	Description
amountIn	uint256	The amount of input tokens to send
amountOutMin	uint256	The minimum amount of TRX to receive
path	address[]	An array of token addresses, ordered from input to output (WTRX)
to	address	The recipient of the output TRX
deadline	uint256	Unix timestamp after which the transaction will revert

• Return value: hash

• Example: Sell USDT to Buy TRX

const swap_v2 = await tronWeb.contract(V2RouterAbi, config.nile.routerV2)
const swapExactTokensForETH_t = await swap_v2.swapExactTokensForETH(20000000, 0, [config.nile.usdtToken, config.nile.wtrxToken], "TXXXXXXXXXXXXXXXXXXXX", Math.floor(Date.now() / 1000 + 86400)).send()
console.log(swapExactTokensForETH_t)