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:
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 such as the gas, bytecode, adminKey, etc.
Calls the to query the network that returns the current state of a smart contract instance, including its balance.
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 getSmartContractInfoAPI = async () => {
const externalAccountParams = {
externalAccount: {
accountIdOrEvmAddress: '0.0.12345',
curve: 'ED25519'
}
}
await window.ethereum.request({
method: 'wallet_invokeSnap',
params: {
snapId,
request: {
method: 'hscs/getSmartContractInfo',
params: {
network: 'testnet',
contractId: '0.0.4409710'
/*
Uncomment the below line if you want to connect
to a non-metamask account
*/
// ...externalAccountParams
}
}
}
})
}
Returns the transaction receipt as response
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 .
You can also check out the to learn how each API works.
