swap smart-router
npm install tronbox
npm run build
- change tronbox.js options
version: '0.6.8'
- Compile
tronbox compile
export PRIVATE_KEY_NILE='Your private key'
tronbox migrate --network nile --f 1 --to 2
User can invoke the swapExactInput method of the smart contract to trigger the transaction. The smart router will handle the transaction data internally and complete the trade.
Description
The swapExactInput function is the unified entrance for swaps.
Function Signature:
function swapExactInput(
address[] calldata path,
string[] calldata poolVersion,
uint256[] calldata versionLen,
uint24[] calldata fees,
SwapData calldata data
) external nonReentrant payable returns (uint256[] memory amountsOut)
struct SwapData {
uint256 amountIn;
uint256 amountOutMin;
address to;
uint256 deadline;
}
Parameters:
path: The token address list for swap to.poolVersion: The version list for pool‘s version for pathed token.versionLen: The length list for pool’s length by version.fees: The fees list for pool’s fees, just support the SUNSWAP V3 poolsdata: The swap info ,UseSwapDataStructure ,obtain tokenamountIn, min amountOut expectamountOutMin,receivertoanddeadline
Fullfill the Parameters
If user use 100000 USDT to swap USDD token, the parameteres should be:
| Name | Value | Description |
|---|---|---|
| path | [USDT address,USDD address] | path of tokens |
| poolVersion | ['usdt20psm'] | poolVersion can be v1,V2,V3,usdt20psm,usdd202pool，2pooltusdusdt,usdc2pooltusdusdt,usdd2pooltusdusdt,usdj2pooltusdusdt, oldusdcpool,old3pool |
| versionLen | ['2'] | array of counts of token numbers in poolVersions, eg: if path = [A,B,C,D],poolVersion = ['v2','v2','v3'],that means A->B use 'V2', B->C use 'V2',C->D use 'V3',so the versionLen = ['3','1']. The number of first poolversion count must +1 |
| fees | [0,0] | poolFees used to distinguish V3 pools; all other pools are set to 0. |
| data | ['100000000000',amountOut *(1 - flapPiont),receiver,deadline] | SwapData |
Example Call:
const tronWeb = require('tronweb');
const contractAddress = 'TCFNp179Lg46D16zKoumd4Poa2WFFdtqYj';
const amountOutMin = '99000000000000000000000'; // Example minimum amount of tokens to receive ,1% flap point
const pathUSDT2USDD = ["TR7NHqjeKQxGTCi8q8ZY4pL8otSzgjLj6t",
"TXDk8mbtRbXeYuMNS83CfKPaYYT8XWv9Hz"]; // Example path
const poolVersion = ["usdt20psm"];
const versionLen = ["2"];
const fees = [0,0];
const amountIn = '100000000000'
const to = 'TYourAddressHere';
const deadline = Math.floor(Date.now() / 1000) + 60 * 20; // 20 minutes from the current Unix time
const swapdata = [amountIn,amountOutMin,to,deadline];
const swapExactInput = async () => {
const contract = await tronWeb.contract(abi, contractAddress);
await contract.swapExactInput(
path,
poolVersion,
versionLen,
fees,
swapdata
).send();
};