examples/v3-sdk/quoting/

// #src/libs/constants.ts  File
export const USDT_TOKEN = new Token(
  SupportedChainId.MAINNET,
  '0xdAC17F958D2ee523a2206206994597C13D831ec7',
  6,
  'USDT',
  'USD//T'
)
export const DAI_TOKEN = new Token(
  SupportedChainId.MAINNET,
  '0x6B175474E89094C44Da98b954EedeAC495271d0F',
  18,
  'DAI',
  'Dai Stablecoin'
)

// #config.ts File
export const CurrentConfig: ExampleConfig = {
  rpc: {
    local: 'http://localhost:8545',
    mainnet: 'https://mainnet.infura.io/v3/0ac57a06f2994538829c14745750d721',
  },
  tokens: {
    in: DAI_TOKEN,
    amountIn: 1000,
    out: USDT_TOKEN,
    poolFee: FeeAmount.MEDIUM,
  },
}

The quote returned by SDK is 215.851506 USDT, while the quote returned by Uniswap's official website is 999.731 USDT. The difference is too large!

I tried to make it work in a dApp using Ethers 6.11 but there's some breaking stuff in the way Ethers 5 vs 6 handle Contract instances methods, therefore await quoterContract.callStatic.quoteExactInputSingle() could not execute under Ethers 6.
It would be amazing to have an updated version of this, together with a multi-hop quoting example.
Keep up the good work guys.

Hi DX team,

I tried running the quoting example after following the steps, but I keep getting this error.

1. Run yarn install
2. Set mainnet rpc url
3. yarn run

I try to run Uniswap example and always get error in browser console:
Uncaught ReferenceError: Browser is not defined
at Va (encode.js:49:1)

Can anybody help me?

I've been attempting to get the example trade to work using a mainnet fork setup with Anvil, as documented here

As far as I can tell, the example doesn't work with the latest version of the libraries:

    "@uniswap/sdk-core": "^4.0.9",
    "@uniswap/v3-sdk": "^3.10.0",

The error is always:

eth_sendRawTransaction

    Transaction: 0x37640ca5d41ca1e7264fff50678cac102cb88ccc20d002c72ef3355b275fe38c
    Gas used: 115902
    Error: reverted with: revert: STF

    Block Number: 18642983
    Block Hash: 0x31395f673ef6640d4e45273ac643840c9f637c9b5ed826c3d6b1e36c295bf5a9
    Block Time: "Fri, 24 Nov 2023 21:25:20 +0000"

Initially, I was seeing an error with eth_estimateGas:

reason: 'cannot estimate gas; transaction may fail or may require manual gas limit',
  code: 'UNPREDICTABLE_GAS_LIMIT'

So I switched to using a pre-defined gasLimit: 5_000_000 in the Tx.

The steps for getting a quote and approving the swap router for token transfers work but the actual swap fails. As a minor detail, I'm not using the UI code but invoking the functions directly like below, so I can run the example from the command line:

async function performTrade() {
  let t = await createTrade();

  let res = await executeTrade(t);

  console.log(`Trade concluded, ${res}`);
}

performTrade()
  .then(() => console.log(`Complete`))
  .catch((e) => console.error(`Error executing trade`, e));

I can see that the quote returns valid data:

Token0 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48
Token1 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2
Fee 3000
Tick spacing 60
Sqrt PriceX96 BigNumber {
  _hex: '0x55528bdd18dd0fa512bb36b96ace',
  _isBigNumber: true
}
Tick 19984

I'd appreciate any input to troubleshoot this issue. I'd be happy to submit a PR to the docs/example code if there is any change required with the latest version of the v3 SDK.

Please integrate the SDK from Space ID.

At the moment, I have the web3 domain ENS - xandry.eth displayed on Uniswap

But I have registered domains in the BNB and Arbitrum networks, so when I change the network to BNB on Uniswap, I expect to see my domain 115.bnb
And when I switch the network to Arbitrum, I expect to see the 360 domain.

There is documentation page: https://docs.space.id/developer-guide/web3-name-sdk

action/run/:protocol/api/bridge:main

Do you have the following problem?
Which node version do you use?

WARNING in ./node_modules/jsbi/dist/jsbi-umd.js
Module Warning (from ./node_modules/source-map-loader/dist/cjs.js):
Failed to parse source map from '/home/wuban/examples/v3-sdk/trading/node_modules/jsbi/lib/jsbi.ts' file: Error: ENOENT: no such file or directory, open '/home/wuban/examples/v3-sdk/trading/node_modules/jsbi/lib/jsbi.ts'

webpack compiled with 1 warning

my node version:
wuban@wuban:~/examples/v3-sdk/trading$ nvm list
-> v16.19.0
v18.16.0
v18.20.0
v20.12.0

https://github.com/Uniswap/examples/blame/1ef393c2b8f8206a3dc5a42562382c267bcc361b/v3-sdk/quoting/src/config.ts#L34-L39`

#27 
| Header |
|--------|
| Cell |
| Cell | 

          > [https://github.com/Uniswap/examples/blame/1ef393c2b8f8206a3dc5a42562382c267bcc361b/v3-sdk/quoting/src/config.ts#L34-L39`](https://github.com/Uniswap/examples/blame/1ef393c2b8f8206a3dc5a42562382c267bcc361b/v3-sdk/quoting/src/config.ts#L34-L39%60)

#27 
| Header |
|--------|
| Cell |
| Cell | 

Originally posted by @Jasonford323 in #53 (comment)

With the Quoting example pointed to Base, I receive this error: {"code":-32000,"message":"execution reverted"

https://github.com/jfbloom22/uniswap-examples

I updated the example to use the latest Uniswap SKD. Got it working pointed to Eth Mainnet. I switched everything to Base, but I can't seem to figure out why I am not able to receive a quote.

I forked base mainnet and am running it locally with: anvil --fork-url https://base-mainnet.chainnodes.org/42e88809-380e-4bcb-8b89-f58ea28dfca0 --fork-block-number 14204436 --fork-chain-id 8453 --chain-id 8453

I pulled the Uniswap contracts from here: https://docs.uniswap.org/contracts/v3/reference/deployments/base-deployments

Any suggestions?

examples/v3-sdk/quoting/src/libs/quote.ts

line 21:
const quotedAmountOut = await quoterContract.callStatic.quoteExactInputSingle(
poolConstants.token0,
poolConstants.token1,
poolConstants.fee,
fromReadableAmount(
CurrentConfig.tokens.amountIn,
CurrentConfig.tokens.in.decimals
).toString(),
0
)

poolConstants.token0 and token1=> two tokens of the pool , sorted by address
some time will reverse input and output address ~

I got this error when try to use sepolia network in v3sdk/routing

multicall-uniswap-provider.ts:45 Uncaught (in promise) Error: No address for Uniswap Multicall Contract on chain id: 11155111
    at new UniswapMulticallProvider (multicall-uniswap-provider.ts:45:1)
    at new AlphaRouter (alpha-router.ts:385:1)
    at generateRoute (routing.ts:27:1)
    at Example.tsx:62:1
    at HTMLUnknownElement.callCallback (react-dom.development.js:4164:1)
    at Object.invokeGuardedCallbackDev (react-dom.development.js:4213:1)
    at invokeGuardedCallback (react-dom.development.js:4277:1)
    at invokeGuardedCallbackAndCatchFirstError (react-dom.development.js:4291:1)
    at executeDispatch (react-dom.development.js:9041:1)
    at processDispatchQueueItemsInOrder (react-dom.development.js:9073:1)

this is in config.ts file

export const CurrentConfig: ExampleConfig = {
  env: Environment.WALLET_EXTENSION,
  rpc: {
    local: 'http://localhost:8545',
    mainnet: 'https://sepolia.infura.io/v3/token',
  },

create new router script

  const router = new AlphaRouter({
    chainId: 11155111,
    provider: getMainnetProvider(),
  })

const SFL_TOKEN = new Token(
ChainId.POLYGON,
"0xD1f9c58e33933a993A3891F8acFe05a68E1afC05",
18,
"SFL",
"Sunflower Land"
);

const USDC_TOKEN = new Token(
ChainId.POLYGON,
"0x2791Bca1f2de4661ED88A30C99A7a9449Aa84174",
6,
"USDC",
"USD Coin"
);

const CurrentConfig = {
rpc: {
mainnet:
"https://polygon-mainnet.g.alchemy.com/v2/OQu5rBT9v5gr-5zOU2ZvwNzJhaNzTGvj",
},
tokens: {
in: USDC_TOKEN,
amountIn: 1,
out: SFL_TOKEN,
poolFee: FeeAmount.MEDIUM,
},
};

This is my configuration file not able to fetch quotes for SFL_TOKEN swap

In the example code the currentPosition is constructed from CurrentConfig which is a const value and can be the same as the mint one. But in real use, there won't be such a CurrentConfig, then how can I calculate it from positionId or the object returned by positionContract.positions(tokenId)?

Error: call revert exception [ See: https://links.ethers.org/v5-errors-CALL_EXCEPTION ] (method="liquidity()", data="0x", errorArgs=null, errorName=null, errorSignature=null, reason=null, code=CALL_EXCEPTION, version=abi/5.7.0)

I'm encountering this issue when I change chain from ethereum to polygon.

I need a quoter using Uniswap router to fetch multi-hop quotes. Anyone seen such a dApp out there?

Keep up the good work y'all!

const WMATIC_TOKEN = new Token(
ChainId.POLYGON,
"0x0d500B1d8E8eF31E21C99d1Db9A6444d3ADf1270",
18,
"WMATIC",
"Wrapped Matic"
);

const USDC_TOKEN = new Token(
ChainId.POLYGON,
"0x2791Bca1f2de4661ED88A30C99A7a9449Aa84174",
6,
"USDC",
"USD Coin"
);

const CurrentConfig = {
rpc: {
mainnet:
"https://polygon-mainnet.infura.io/v3/2945612d95e74e4f82e05d4fbf00db6c",
},
tokens: {
in: USDC_TOKEN,
amountIn: 25,
out: WMATIC_TOKEN,
poolFee: FeeAmount.MEDIUM,
},
};

const sendTransaction = async (transaction) => {
if(transaction.value){
transaction.value = BigNumber.from(transaction.value)
}

const txRes = await wallet.sendTransaction(transaction);  // getting error over here
if(txRes){
    console.log('Hurrey')
}else{
    console.log('Hell')
}
let receipt = null
const provider = getProvider();
while(receipt === null){
 try {
     receipt = await provider.getTransactionReceipt(txRes.hash)
     if(receipt === null){
         continue
     }
 } catch (error) {
     console.log(`Receipt error:`, error)
   break
 }
}
if(receipt){
 console.log('Transaction Sent')
 return true;
}else{
 console.log('Transaction Failed')
 return null;
}

}

const getTokenTransferApproval = async (token) => {
const provider = getProvider();
const address = getWalletAddress();

if (!provider || !address) {
console.log("please check provider or walletAddress");
}
try {
const tokenContract = new ethers.Contract(
token.address,
ERC20_ABI,
provider
);

const transaction = await tokenContract.populateTransaction.approve(
    SWAP_ROUTER_ADDRESS,
    fromReadableAmount(
      TOKEN_AMOUNT_TO_APPROVE_FOR_TRANSFER,
      token.decimals
    ).toString()
  )

const resp = await sendTransaction({
  ...transaction,
  from: address,
});

return resp;

} catch (e) {
console.log(e);
console.log('approval failed')
}
};

const tokenApproval = await getTokenTransferApproval(CurrentConfig.tokens.in);

getting error as follow:

Error: transaction underpriced
at /Users/jithendrakumar/Desktop/uniswap/new-uniswap1/node_modules/@ethersproject/providers/lib/json-rpc-batch-provider.js:72:41
at Array.forEach ()
at /Users/jithendrakumar/Desktop/uniswap/new-uniswap1/node_modules/@ethersproject/providers/lib/json-rpc-batch-provider.js:69:27
at process.processTicksAndRejections (node:internal/process/task_queues:95:5) {
code: -32000,
data: undefined,
transaction: {
type: 2,
chainId: 137,
nonce: 21,
maxPriorityFeePerGas: BigNumber { _hex: '0x59682f00', _isBigNumber: true },
maxFeePerGas: BigNumber { _hex: '0x6a0d032ab4', _isBigNumber: true },
gasPrice: null,
gasLimit: BigNumber { _hex: '0xb41d', _isBigNumber: true },
to: '0x0d500B1d8E8eF31E21C99d1Db9A6444d3ADf1270',
value: BigNumber { _hex: '0x00', _isBigNumber: true },
data: '0x095ea7b3000000000000000000000000e592427a0aece92de3edee1f18e0157c0586156400000000000000000000000000000000000000000001a784379d99db42000000',
accessList: [],
hash: '0x8a40ff615225b916935ceb17e2098b7ff178ef1d24b5ff1ad0bb10d7dd1c693f',
v: 0,
r: '0x0ddf0e88ae53876d4d2d70a556bc25bffab46533ac19ebf75b8150c349c74ebd',
s: '0x6c2ec585a1c12c094bfc7c75b735749cbae97e3056e70de0f1837ae0aba8ee3b',
from: '0xaDe56237C3b7d4E000641eA0484dC9B44B9d366f',
confirmations: 0
},
transactionHash: '0x8a40ff615225b916935ceb17e2098b7ff178ef1d24b5ff1ad0bb10d7dd1c693f'
}

Using this configuration in v3-sdk/quoting/config.ts:

  tokens: {
    in: USDC_TOKEN,
    amountIn: 1000,
    out: WETH_TOKEN,
    poolFee: FeeAmount.MEDIUM,
  },

I got this result (which is correct):

On Mar 4th, 2023, 1 ETH is $1570. So with $1000, we would get around 0.63 ETH.

But when I switched the tokens, I got the wrong result. I used this configuration:

  tokens: {
    in: WETH_TOKEN,
    amountIn: 1,
    out: USDC_TOKEN,
    poolFee: FeeAmount.MEDIUM,
  },

The result should be ~1570 USDC.