getTransactions

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:

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

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

  /*
    If you want to retrieve all the transactions for your account, 
    transactionId can be empty
  */
  const getTransactionsParams = {
    transactionId: '0.0.4228598@1706816923.997995813'
  }

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

If you pass in an empty transactionId or don't pass anything to this API, it'll retrieve all the transactions associated with your account.

What the API does

1. Retrieves the currently connected account the user has selected on Metamask. If it's the first time, a new snap account is created and the account info is saved in snap state.

2. Parses the arguments that were passed such as transactionId to retrieve info for. If this is not passed, the API will fetch all the transactions for the account.

3. Calls the Hedera Mirror Node REST API for transactions to retrieve transactions history.

4. Return the transactions details

An example response:

{
  "currentAccount": {
    "hederaAccountId": "0.0.4235873",
    "hederaEvmAddress": "0x3ba201df50314e4702d4d92b52d304ee63bfca23",
    "balance": {
      "hbars": 0.75108133,
      "timestamp": "Wed, 24 Jan 2024 21:58:32 GMT",
      "tokens": {}
    },
    "network": "mainnet"
  },
  "transactions": [
    {
      "bytes": null,
      "charged_tx_fee": 65919908,
      "consensus_timestamp": "Wed, 24 Jan 2024 21:58:32 GMT",
      "entity_id": null,
      "max_fee": "100000000",
      "memo_base64": "",
      "name": "CRYPTOTRANSFER",
      "nft_transfers": [],
      "node": "0.0.8",
      "nonce": 0,
      "parent_consensus_timestamp": "",
      "result": "SUCCESS",
      "scheduled": false,
      "staking_reward_transfers": [],
      "token_transfers": [],
      "transaction_hash": "lbF/gV2X5IDZBjRVdqiR+AAxKP0Kop8Z51Xt9DcNqGHgMI7PGSR1BoBCPR0aE2jz",
      "transaction_id": "0.0.4235873-1706133501-928562334",
      "transfers": [
        {
          "account": "0.0.8",
          "amount": 5679,
          "is_approval": false
        },
        {
          "account": "0.0.98",
          "amount": 59322807,
          "is_approval": false
        },
        {
          "account": "0.0.800",
          "amount": 6591422,
          "is_approval": false
        },
        {
          "account": "0.0.4235873",
          "amount": -65919918,
          "is_approval": false
        },
        {
          "account": "0.0.4551503",
          "amount": 10,
          "is_approval": false
        }
      ],
      "valid_duration_seconds": "120",
      "valid_start_timestamp": "Wed, 24 Jan 2024 21:58:21 GMT"
    }
  ]
}

Live Demo on CodePen

Some things to keep in mind while interacting with the above demo

• If you're getting any errors with the live demo, make sure you go through the FAQs section to learn about what you may be missing. You need to install Metamask in your browser for the live demo to work

To ease the integration of Hedera Wallet Snap on an application, we have created a template web application that you can run locally and check out the code in its entirety to learn how you can integrate and interact with various APIs exposed by Hedera Wallet Snap. Check out the full source code at template application github repository.

You can also check out the API reference to learn how each API works.