chore(public): Improve Universal Router README with clearer instructions and example

sdks/universal-router-sdk/README.md

@@ -2,24 +2,73 @@
 This SDK facilitates interactions with the contracts in [Universal Router](https://github.com/Uniswap/universal-router)
 
 ## Usage
-Install latest version of universal-router-sdk. Then import the corresponding Trade class and Data object for each protocol you'd like to interact with.
+Install the latest version of universal-router-sdk. 
+```bash 
+npm install @uniswap/universal-router-sdk
+```
+Then import the corresponding Trade class and Data object for each protocol you'd like to interact with.
 
 ### Trading on Uniswap
-warning: `swapERC20CallParameters()` to be deprecated in favor of `swapCallParameters()`
+**Note**: `swapERC20CallParameters()` has been deprecated in favor of `swapCallParameters()`
+
 ```typescript
-import { TradeType } from '@uniswap/sdk-core'
+import { TradeType, CurrencyAmount, Token, Percent } from '@uniswap/sdk-core'
 import { Trade as V2TradeSDK } from '@uniswap/v2-sdk'
 import { Trade as V3TradeSDK } from '@uniswap/v3-sdk'
-import { MixedRouteTrade, MixedRouteSDK, Trade as RouterTrade } from '@uniswap/router-sdk'
+import { Trade as V2TradeSDK } from '@uniswap/v2-sdk'
+import { Trade as RouterTrade } from '@uniswap/router-sdk'
+import { SwapRouter, UNIVERSAL_ROUTER_ADDRESS } from '@uniswap/universal-router-sdk'
+import { Percent, Token, TradeType } from '@uniswap/sdk-core'
+
+// Define your tokens
+const WETH = new Token(1, '0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2', 18, 'WETH')
+const USDC = new Token(1, '0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48', 6, 'USDC')
+
+// Create a trade object (this is a simplified example, you'd normally get this from a routing API or SDK)
+const trade = new RouterTrade({
+  v2Routes: [/* ... */],
+  v3Routes: [/* ... */],
+  mixedRoutes: [/* ... */],
+  tradeType: TradeType.EXACT_INPUT
+})
+
+// Define trade options
+const options = {
+  slippageTolerance: new Percent(50, 10_000), // 0.5% slippage tolerance
+  recipient: '0x...',  // The address that will receive the output tokens
+  deadlineOrPreviousBlockhash: Math.floor(Date.now() / 1000) + 60 * 20, // 20 minutes from now
+}
+
+// Get the parameters for the swap
+const { calldata, value } = SwapRouter.swapCallParameters(trade, options)
 
-const options = { slippageTolerance, recipient }
-const routerTrade = new RouterTrade({ v2Routes, v3Routes, mixedRoutes, tradeType: TradeType.EXACT_INPUT })
-// Use the raw calldata and value returned to call into Universal Swap Router contracts
-const { calldata, value } = SwapRouter.swapCallParameters(routerTrade, options)
+// Use the calldata and value to send a transaction to the Universal Router
+const tx = {
+  to: UNIVERSAL_ROUTER_ADDRESS,
+  data: calldata,
+  value: value
+}
+
+// Send the transaction using your preferred method (e.g., ethers.js, web3.js)
+// const txResponse = await wallet.sendTransaction(tx)
+// await txResponse.wait()
+
+console.log('Transaction parameters:', tx)
 ```
 
+This example demonstrates how to:
+1. Import necessary classes and functions from Uniswap SDKs
+2. Define tokens for the trade
+3. Create a trade object (simplified in this example)
+4. Set up trade options including slippage tolerance and recipient
+5. Generate the calldata and value for the swap
+6. Prepare a transaction object for sending to the Universal Router
+
+Remember to handle errors, validate inputs, and implement proper transaction sending and confirmation in your actual implementation.
+
 ## Running this package
 Make sure you are running `node v18`
+
 Install dependencies and run typescript unit tests
 ```bash
 yarn install
@@ -31,3 +80,6 @@ Run forge integration tests
 forge install
 yarn test:forge
 ```
+
+## Contributing
+Contributions to improve the SDK or documentation are welcome. Please ensure you follow the existing code style and add appropriate tests for any new functionality.