Deposit ETH into a DeFi Protocol (Aave)

This action shows how to use the swapped asset (in this case, native ETH) in a DeFi protocol. The example targets an Aave contract and calls depositETH. The crucial parameter is populateCallValueDynamically: true, which instructs the protocol to use the entire ETH balance received from the swap as the value for this contract call. All arguments to the depositETH function are provided as static values.

Request Body

{
  "actions": [
    {
      "target": "0x5283BEcEd7ADF6D003225C13896E536f2D4264FF",
      "functionSignature": "function depositETH(address, address onBehalfOf, uint16 referralCode)",
      "args": [
        {
          "value": "0x0000000000000000000000000000000000000000",
          "populateDynamically": false
        },
        {
          "value": "0x718648C8c531F91b528A7757dD2bE813c3940608",
          "populateDynamically": false
        },
        {
          "value": "0",
          "populateDynamically": false
        }
      ],
      "value": "0",
      "isNativeTransfer": false,
      "populateCallValueDynamically": true
    }
  ]
}

---

Approve and execute a crosschain swap and then Deposit ETH into a DeFi Protocol (Aave)

post

Initiates a crosschain swap approval and execution step. Requires query parameters and a JSON body of actions. Returns swap details, fees, steps, and transaction data.

Query parameters

tradeTypestring · enumRequiredExample: exactInputPossible values:

amountstringRequiredExample: 10000000

inputTokenstringRequiredExample: 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48

outputTokenstringRequiredExample: 0x0000000000000000000000000000000000000000

originChainIdintegerRequiredExample: 1

destinationChainIdintegerRequiredExample: 42161

depositorstringRequiredExample: 0xA4d353BBc130cbeF1811f27ac70989F9d568CeAB

recipientstringRequiredExample: 0xA4d353BBc130cbeF1811f27ac70989F9d568CeAB

Body

application/json

Responses

200

Successful swap approval

application/json

Responseobject

400

Invalid request

application/json

post

HTTPcURLJavaScriptPython

POST /api/swap/approval HTTP/1.1
Host: app.across.to
Content-Type: application/json
Accept: */*
Content-Length: 451

{
  "actions": [
    {
      "target": "0x5283BEcEd7ADF6D003225C13896E536f2D4264FF",
      "functionSignature": "function depositETH(address, address onBehalfOf, uint16 referralCode)",
      "args": [
        {
          "value": "0x0000000000000000000000000000000000000000",
          "populateDynamically": false
        },
        {
          "value": "0x718648C8c531F91b528A7757dD2bE813c3940608",
          "populateDynamically": false
        },
        {
          "value": "0",
          "populateDynamically": false
        }
      ],
      "value": "0",
      "isNativeTransfer": false,
      "populateCallValueDynamically": true
    }
  ]
}

{
  "crossSwapType": "bridgeableToAny",
  "amountType": "exactInput",
  "checks": {
    "allowance": {
      "token": "0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48",
      "spender": "0x6f26Bf09B1C792e3228e5467807a900A503c0281",
      "actual": "115792089237316195423570985008687907853269984665640564039457584007913092639935",
      "expected": "10000000"
    },
    "balance": {
      "token": "0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48",
      "actual": "500000000",
      "expected": "10000000"
    }
  },
  "steps": {
    "bridge": {
      "inputAmount": "10000000",
      "outputAmount": "9968133",
      "tokenIn": {
        "decimals": 6,
        "symbol": "USDC",
        "address": "0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48",
        "name": "USD Coin",
        "chainId": 1
      },
      "tokenOut": {
        "address": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
        "decimals": 6,
        "symbol": "USDC",
        "chainId": 42161
      },
      "fees": {
        "totalRelay": {
          "pct": "3186713237776016",
          "total": "31867"
        },
        "relayerCapital": {
          "pct": "100000000000000",
          "total": "1000"
        },
        "relayerGas": {
          "pct": "3077000000000000",
          "total": "30770"
        },
        "lp": {
          "pct": "9713237776016",
          "total": "97"
        },
        "originGas": {
          "pct": "123456000000000",
          "total": "123"
        },
        "destinationGas": {
          "pct": "654321000000000",
          "total": "321"
        },
        "relayerTotal": {
          "pct": "3170000000000000",
          "total": "31700"
        },
        "lpFee": {
          "pct": "716237776016",
          "total": "67"
        }
      }
    },
    "destinationSwap": {
      "tokenIn": {
        "address": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
        "decimals": 6,
        "symbol": "USDC",
        "chainId": 42161
      },
      "tokenOut": {
        "decimals": 18,
        "symbol": "ETH",
        "address": "0x82aF49447D8a07e3bd95BD0d56f35241523fBab1",
        "name": "Ether",
        "chainId": 42161
      },
      "inputAmount": "9968133",
      "maxInputAmount": "9968133",
      "outputAmount": "2061819304171612",
      "minOutputAmount": "2041201111128300",
      "swapProvider": {
        "name": "0x",
        "sources": [
          "pancakeswap_v3"
        ]
      }
    }
  },
  "inputToken": {
    "decimals": 6,
    "symbol": "USDC",
    "address": "0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48",
    "name": "USD Coin",
    "chainId": 1
  },
  "outputToken": {
    "decimals": 18,
    "symbol": "ETH",
    "address": "0x82aF49447D8a07e3bd95BD0d56f35241523fBab1",
    "name": "Ether",
    "chainId": 42161
  },
  "refundToken": {
    "decimals": 6,
    "symbol": "USDC",
    "address": "0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48",
    "name": "USD Coin",
    "chainId": 1
  },
  "inputAmount": "10000000",
  "expectedOutputAmount": "2061819304171612",
  "minOutputAmount": "2041201111128300",
  "expectedFillTime": 3,
  "swapTx": {
    "simulationSuccess": false,
    "chainId": 1,
    "to": "0x6f26Bf09B1C792e3228e5467807a900A503c0281",
    "data": "0xad5425c600000000000000...",
    "maxFeePerGas": "1002599",
    "maxPriorityFeePerGas": "1000000"
  },
  "id": "c64fg-1755905774371-44a89a59ef9b"
}