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Documentation Index

Fetch the complete documentation index at: https://docs.enso.build/llms.txt

Use this file to discover all available pages before exploring further.

Quoter is source-agnostic. Any valid EVM transaction calldata can be simulated and validated, regardless of where it came from.

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Supported Sources

DEX Aggregators

1inch, 0x Protocol, Paraswap, Odos, KyberSwap, OpenOcean

DeFi Protocols

Aave, Compound, Uniswap, Yearn, Morpho, Maker

Custom Contracts

Your own smart contracts, multisig wallets, ERC-4337 UserOps

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Example: Custom Contract Interaction

Encode a contract call with viem and simulate it with Quoter. 
import { encodeFunctionData, parseAbi } from "viem";

// Step 1: Encode your contract call
const data = encodeFunctionData({
  abi: parseAbi(["function deposit(uint256 amount, address receiver) returns (uint256)"]),
  functionName: "deposit",
  args: [1000000000n, "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045"],
});

// Step 2: Simulate with Quoter
const simulation = await fetch("https://quoter.api.enso.build/api/v1/simulate", {
  method: "POST",
  headers: {
    "Authorization": `Bearer ${ENSO_API_KEY}`,
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    chainId: 1,
    transaction: {
      data,
      value: "0",
      to: "0xa354F35829Ae975e850e23e9615b11Da1B3dC4DE",
      from: "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045",
    },
    tokenIn: ["0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48"],
    tokenOut: ["0xa354F35829Ae975e850e23e9615b11Da1B3dC4DE"],
    amountIn: ["1000000000"],
  }),
}).then((res) => res.json());

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Mapping Transaction Fields

When working with different web3 libraries, here’s how to extract the fields Quoter expects:
Quoter Fieldviemethers.js v6web3.js
datatx.datatx.datatx.data
totx.totx.totx.to
fromtx.fromtx.fromtx.from
valuetx.value.toString()tx.value.toString()tx.value
Quoter does not modify your transaction. It only simulates and validates. The transaction you submit on-chain is exactly what you built.

Updated