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hts/completeSwap

How to call the API from an app

Hedera Wallet Snap connects to your currently connected Metamask account by default. To learn how apps can connect to Hedera Wallet Snap using a non-metamask(external) account, refer to this documentation.

Then, depending on whether you're trying to connect to a metamask account or a non-metamask account, you can call the snap API in the following way:

Before this API can be called, a corresponding API must first be called that will initialize the atomic swap between two parties
This API must be called within 30 minutes after initializing the swap or the transaction will fail

What the API does

Retrieves the currently connected account the user has selected on Metamask. If it's the first time, a new is created and the account info is saved in snap state.
Parses the arguments that were passed
Uses to implement the atomic swap feature whereby the requester initiates the swap with the responder by calling the API upon which the snap sends this transaction as a scheduled transaction to the ledger. Within 30 minutes, if the

Example of how the Atomic Swap is performed

Let's assume Alice wants to swap her 1 Hbar with 10 Tuum token that Bob has(basically a peer to peer swap)

Alice calls the snap API for and as part of the parameters, she says she wants to give her 1 Hbar to Bob if Bob can give Alice 10 Tuum tokens
Snap creates this atomic swap transaction and sends it to the network as a scheduled transaction with a max expiry of 30 minutes
Snap returns the schedule Id for this transaction

An example response:

Live Demo on CodePen

Note: Visit to activate your hedera account before you interact with the demo
If you're getting any errors with the live demo, make sure you go through the section to learn about what you may be missing. You need to install in your browser for the live demo to work.

hts/completeSwap

How to call the API from an app

Then, depending on whether you're trying to connect to a metamask account or a non-metamask account, you can call the snap API in the following way:

const snapId = `npm:@hashgraph/hedera-wallet-snap`

const initiateSwapAPI = async () => {
  const externalAccountParams = {
    externalAccount: {
      accountIdOrEvmAddress: '0.0.12345',
      curve: 'ED25519'
    }
  }

  await window.ethereum.request({
    method: 'wallet_invokeSnap',
    params: {
      snapId,
      request: {
        method: 'hts/completeSwap',
        params: {
          network: 'testnet',
          scheduleId: '0.0.4285081',
          /* 
            Uncomment the below line if you want to connect 
            to a non-metamask account
          */
          // ...externalAccountParams
        }
      }
    }
  })
}

Before this API can be called, a corresponding API must first be called that will initialize the atomic swap between two parties
This API must be called within 30 minutes after initializing the swap or the transaction will fail

What the API does

Retrieves the currently connected account the user has selected on Metamask. If it's the first time, a new is created and the account info is saved in snap state.
Parses the arguments that were passed
Uses to implement the atomic swap feature whereby the requester initiates the swap with the responder by calling the API upon which the snap sends this transaction as a scheduled transaction to the ledger. Within 30 minutes, if the

Example of how the Atomic Swap is performed

Let's assume Alice wants to swap her 1 Hbar with 10 Tuum token that Bob has(basically a peer to peer swap)

Alice calls the snap API for and as part of the parameters, she says she wants to give her 1 Hbar to Bob if Bob can give Alice 10 Tuum tokens
Snap creates this atomic swap transaction and sends it to the network as a scheduled transaction with a max expiry of 30 minutes
Snap returns the schedule Id for this transaction

An example response:

Live Demo on CodePen

Note: Visit to activate your hedera account before you interact with the demo
If you're getting any errors with the live demo, make sure you go through the section to learn about what you may be missing. You need to install in your browser for the live demo to work.

const snapId = `npm:@hashgraph/hedera-wallet-snap`

const initiateSwapAPI = async () => {
  const externalAccountParams = {
    externalAccount: {
      accountIdOrEvmAddress: '0.0.12345',
      curve: 'ED25519'
    }
  }

  await window.ethereum.request({
    method: 'wallet_invokeSnap',
    params: {
      snapId,
      request: {
        method: 'hts/completeSwap',
        params: {
          network: 'testnet',
          scheduleId: '0.0.4285081',
          /* 
            Uncomment the below line if you want to connect 
            to a non-metamask account
          */
          // ...externalAccountParams
        }
      }
    }
  })
}

{
    "currentAccount": {
        "metamaskEvmAddress": "0x0b3628d1b838993b5fceec8b2a26502e7a8e5241",
        "externalEvmAddress": "",
        "hederaAccountId": "0.0.3589358",
        "hederaEvmAddress": "0x0ca39034793f026127bcfb651b85515394fd21b1",
        "publicKey": "0x03d5f871cfe7134c67799dc6df75cdfc4b3f4fd797442350297efa9483661916d2",
        "balance": {
            "hbars": 346.70233551,
            "timestamp": "Fri, 26 Apr 2024 19:24:31 GMT"
        },
        "network": "testnet",
        "mirrorNodeUrl": "https://testnet.mirrornode.hedera.com"
    },
    "receipt": {
        "status": "SUCCESS",
        "accountId": "",
        "fileId": "",
        "contractId": "",
        "topicId": "",
        "tokenId": "",
        "scheduleId": "",
        "exchangeRate": {
            "hbars": 30000,
            "cents": 333977,
            "expirationTime": "Fri, 26 Apr 2024 20:00:00 GMT",
            "exchangeRateInCents": 11.132566666666667
        },
        "topicSequenceNumber": "0",
        "topicRunningHash": "",
        "totalSupply": "0",
        "scheduledTransactionId": "[email protected]?scheduled",
        "serials": [],
        "duplicates": [],
        "children": []
    }
}

{
    "currentAccount": {
        "metamaskEvmAddress": "0x0b3628d1b838993b5fceec8b2a26502e7a8e5241",
        "externalEvmAddress": "",
        "hederaAccountId": "0.0.3589358",
        "hederaEvmAddress": "0x0ca39034793f026127bcfb651b85515394fd21b1",
        "publicKey": "0x03d5f871cfe7134c67799dc6df75cdfc4b3f4fd797442350297efa9483661916d2",
        "balance": {
            "hbars": 346.70233551,
            "timestamp": "Fri, 26 Apr 2024 19:24:31 GMT"
        },
        "network": "testnet",
        "mirrorNodeUrl": "https://testnet.mirrornode.hedera.com"
    },
    "receipt": {
        "status": "SUCCESS",
        "accountId": "",
        "fileId": "",
        "contractId": "",
        "topicId": "",
        "tokenId": "",
        "scheduleId": "",
        "exchangeRate": {
            "hbars": 30000,
            "cents": 333977,
            "expirationTime": "Fri, 26 Apr 2024 20:00:00 GMT",
            "exchangeRateInCents": 11.132566666666667
        },
        "topicSequenceNumber": "0",
        "topicRunningHash": "",
        "totalSupply": "0",
        "scheduledTransactionId": "[email protected]?scheduled",
        "serials": [],
        "duplicates": [],
        "children": []
    }
}

hts/completeSwap

hashtagHow to call the API from an app

hashtagWhat the API does

hashtagExample of how the Atomic Swap is performed

hashtagLive Demo on CodePen

hts/completeSwap

hashtagHow to call the API from an app

hashtagWhat the API does

hashtagExample of how the Atomic Swap is performed

hashtagLive Demo on CodePen

How to call the API from an app

What the API does

Example of how the Atomic Swap is performed

Live Demo on CodePen

How to call the API from an app

What the API does

Example of how the Atomic Swap is performed

Live Demo on CodePen