> For the complete documentation index, see [llms.txt](https://docs.ambient.finance/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.ambient.finance/developers/dex-contract-interface/swaps/hot-path-swap-migration/directly-calling-crocswapdex.md).

# Directly Calling CrocSwapDex

The most gas efficient approach is for users to directly call the `CrocSwapDex` contract. However with the swap path upgrade, swappers must use the `userCmd()`function.

This method takes the same arguments as `swap()`but requires pre-formatting the arguments to the call into an ABI byte array. `userCmd()` should be called with a proxy index of 1 (the swap callapth) and the standard swap arguments ABI encoded.

### Solidity

```jsx
// Ethereum
address dex = 0xAaAaAAAaA24eEeb8d57D431224f73832bC34f688

uint16 SWAP_PROXY = 1

CrocSwapDex(dex).userCmd(SWAP_PROXY, abi.encode(
	base, 
  quote,
  poolIdx, 
  isBuy, 
  inBaseQty, 
  qty, 
  tip,
  limitPrice, 
  minOut,
  settleFlags));

------------------------------------------------------------
// Scroll
address dex = 0xAaAaAAAaA24eEeb8d57D431224f73832bC34f688

uint16 SWAP_PROXY = 1

CrocSwapDex(dex).userCmd(SWAP_PROXY, abi.encode(
	base, 
  quote,
  poolIdx, 
  isBuy, 
  inBaseQty, 
  qty, 
  tip,
  limitPrice, 
  minOut,
  settleFlags));
```

### Javascript

```jsx
const { ethers } = require('ethers');
import { AbiCoder } from "ethers/lib/utils";

const provider = new ethers.providers.JsonRpcProvider(...);

const routerAbi = ... // See below

const etherDexAddr = "0xAaAaAAAaA24eEeb8d57D431224f73832bC34f688"
const scrollDexAddr = "0xAaAaAAAaA24eEeb8d57D431224f73832bC34f688"

const contract = new ethers.Contract(etherRouterAddr, routerAbi, provider);

const abi = new ethers.utils.AbiCoder()
const cmd = abi.encode([
	"address", 
	"address", 
	"uint256", 
	"bool", 
	"bool", 
	"uint128", 
	"uint16", 
	"uint128", 
	"uint128", 
	"uint8"], 
[
	base, 
  quote,
  420, 
  isBuy, 
  inBaseQty, 
  qty, 
  0,
  limitPrice, 
  minOut,
  settleFlags])

contract.userCmd(1, cmd)
```

#### ABI

```jsx
[{
      "inputs": [
        {
          "internalType": "uint16",
          "name": "callpath",
          "type": "uint16"
        },
        {
          "internalType": "bytes",
          "name": "cmd",
          "type": "bytes"
        }
      ],
      "name": "userCmd",
      "outputs": [
        {
          "internalType": "bytes",
          "name": "",
          "type": "bytes"
        }
      ],
      "stateMutability": "payable",
      "type": "function"
    }]
```