Uniswap Adapter Showcase

In this demonstration, we'll highlight the application of the Uniswap V3 Adapter within the Nexera-Fi SDK for executing a token swap operation, assuming that the strategy Orchestrator instance is already deployed and configured (see Deployment & Configuration Guide, Initializing Adapters)

Specifically, we will swap DAI tokens for WETH.

Make sure you've appropriately initialized the NexeraFiSDK, covering configurations essential for further interactions.

const chainId: ChainId = 1; // Ethereum Mainnet
 
// Target Assets
// Note: Assets at play should be already whitelisted in the `Orchestrator`
const DAI = "0x6B175474E89094C44Da98b954EedeAC495271d0F"; // Token in balance
const WETH = "0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2"; // Target asset
 
// Target Adapter (i.e. UniswapAdapter)
const UniswapAdapter = nexeraFiSdk.getAdapters(chainId).UniswapAdapter;
 
// Connect to your Orchestrator instance
// Note: `UniswapAdapter` should be already whitelisted and properly initialized in the `Orchestrator`
const orchestratorAddress = "..."; // Replace with the addrress of the instance you own 
const Orchestrator = nexeraFiSdk.getOrchestrator(orchestratorAddress, wallet_signer);
 
// Get nonce for Tx
let nonce_ = await wallet_signer.getTransactionCount();
 
// Send DAI to Orchestrator
// (Adapters can only manage assets that are allocated to the Orchestrator)
await DaiContract.connect(wallet_signer).transfer(
    Orchestrator.address,
    ethers.utils.parseEther("1000"), // 1000 DAI
    {nonce: nonce_}
);
 
/* ------------------- Construct `out` & `expectedIn` token compositions, and `extraData` ------------------- */
// Tokens to send (i.e. 1000 DAI)
const out = [
    { 
        token: DAI,
        amount: ethers.utils.parseEther("1000")
    },
];
 
// Token to receive (i.e. WETH)
// `amount` field is for Minimum amount of tokens expected to be received (set "0" to not indicate a limit)
const expectedIn = [
    { token: WETH, amount: "0" }
];
 
// Extra data contains extra arguments used by the function (i.e. expected `fee` and `sqrtPriceLimitX96`)
const extraData = ethers.utils.defaultAbiCoder.encode(
    ["uint24", "uint160"],
    // fee = 0.5%, sqrtPriceLimitX96 = 0
    [500, "0"]
);
 
// Use `callStatic` to simulate the Tx and acquire what is received (asset-wise) by the Orchestrator
const totalReceived = await Orchestrator.callStatic.execute(
    [{
        adapter: UniswapAdapter.address,
        op: Operation.SWAP, // `Operation` enum is exported by the NexeraFi-SDK package
        send: out,
        minReceive: expectedIn,
        extraData: extraData
    }]
);
 
nonce_ = await wallet_signer.getTransactionCount(); // Get nonce for Tx
 
// Execute Swap action
await Orchestrator.execute(
    [{
        adapter: UniswapAdapter.address,
        op: Operation.SWAP,
        send: out,
        minReceive: expectedIn,
        extraData: extraData
    }],
    {nonce: nonce_}
);
 
nonce_ = await wallet_signer.getTransactionCount(); // Get nonce for Tx
 
// Withdraw specified assets from the Orchestrator and transfer them to a designated receiver
await Orchestrator.withdraw(WETH, totalReceived[0][0].amount, wallet_signer.address, {nonce: nonce_});