Opening Intents

Open a private intent

EVM -> Aztec

Check the full code

Open Order on EVM chain

Create a new OrderData object with the intent data:

const orderData = new OrderData({
    sender: USER_ADDRESS,
    recipient: SECRET_HASH,
    inputToken: TOKEN_ON_EVM,
    outputToken: TOKEN_ON_AZTEC,
    amountIn: AMOUNT_IN,
    amountOut: AMOUNT_OUT,
    senderNonce: INTENT_NONCE,
    originDomain: L2_EVM_GATEWAY_7683_DOMAIN,
    destinationDomain: AZTEC_7683_DOMAIN,
    destinationSettler: GATEWAY_ON_AZTEC,
    fillDeadline: FILL_DEADLINE,
    orderType: PRIVATE_ORDER=1,
    data: DATA = padHex("0x00"),
})

The SECRET_HASH is a Poseidon2Hash of a chosen secret word. It can be achieved using import { poseidon2Hash } from "@aztec/foundation/crypto"

Open Intent on L2_EVM chain:

await evmWalletClient.writeContract({
    address: GATEWAY_ON_L2_EVM,
    functionName: "open",
    abi: GATEWAY_ABI,
    args: [
    {
        fillDeadline,
        orderDataType: ORDER_DATA_TYPE,
        orderData: orderData.encode(),
    },
    ],
})

with: ORDER_DATA_TYPE = 0xf00c3bf60c73eb97097f1c9835537da014e0b755fe94b25d7ac8401df66716a0

Claim private on Aztec:

Claim funds on aztec using aztec.js calling claim_private on the aztec gateway:

await aztec_gateway.methods
    .claim_private(
        secret,
        Array.from(hexToBytes(orderId.toString())),
        Array.from(hexToBytes(log.originData as 0x${string})),
        Array.from(hexToBytes(log.fillerData as 0x${string})),
    )
    .send({
        fee: {
        paymentMethod,
        },
    })
    .wait()

Aztec -> EVM

Check the full code

Open Order on Aztec

Create a new OrderData object with the intent data:

const orderData = new OrderData({
    sender: USER_ADDRESS,
    recipient: SECRET_HASH,
    inputToken: TOKEN_ON_AZTEC,
    outputToken: TOKEN_ON_L2_EVM,
    amountIn: AMOUNT_IN,
    amountOut: AMOUNT_OUT,
    senderNonce: INTENT_NONCE,
    originDomain: AZTEC_7683_DOMAIN,
    destinationDomain: EVM_DOMAIN,
    destinationSettler: DESTINATION_SETTLER_EVM,
    fillDeadline: FILL_DEADLINE,
    orderType: PRIVATE_ORDER=1,
    data: DATA,
})

The SECRET_HASH is a Poseidon2Hash of a chosen secret word. It can be achieved using import { poseidon2Hash } from "@aztec/foundation/crypto"

Open the intent using aztec.js:

await aztec7683
    .withWallet(user)
    .methods.open_private({
        fill_deadline: FILL_DEADLINE,
        order_data: Array.from(hexToBytes(orderData.encode())),
        order_data_type: Array.from(hexToBytes(ORDER_DATA_TYPE)),
    })
    .with({
        authWitnesses: [witness],
    })
    .send({ fee: { paymentMethod } })
    .wait()

with ORDER_DATA_TYPE = 0xf00c3bf60c73eb97097f1c9835537da014e0b755fe94b25d7ac8401df66716a0