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 updateSmartContractAPI = async () => {
const externalAccountParams = {
externalAccount: {
accountIdOrEvmAddress: '0.0.12345',
curve: 'ED25519'
}
}
await window.ethereum.request({
method: 'wallet_invokeSnap',
params: {
snapId,
request: {
method: 'hscs/updateSmartContract',
params: {
network: 'testnet',
contractId: '0.0.4409710',
adminKey?, // Optional param - type: string
contractMemo?, // Optional param - type: string
expirationTime?, // Optional param - type: string
maxAutomaticTokenAssociations?, // Optional param - type: number
stakedAccountId?, // Optional param - type: string
stakedNodeId?, // Optional param - type: number
declineStakingReward?, // Optional param - type: boolean
autoRenewPeriod?, // Optional param - type: number
autoRenewAccountId?, // Optional param - type: string
/*
Uncomment the below line if you want to connect
to a non-metamask account
*/
// ...externalAccountParams
}
}
}
})
}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.
Parses the arguments that were passed such as the contractid, adminKey, etc.
Calls the Hedera SDK Create Update Contract API to modify the smart contract entity state like admin keys, proxy account, auto-renew period, and memo.
Returns the transaction receipt as response
An example response:
{
"currentAccount": {
"metamaskEvmAddress": "0x0b3628d1b838993b5fceec8b2a26502e7a8e5241",
"externalEvmAddress": "",
"hederaAccountId": "0.0.3581604",
"hederaEvmAddress": "0xca53f9c93d30e0b7212d67901e5a24fb090d542b",
"publicKey": "0x0206022cea4c6dd6d2e7263b8802253971de922f5380661d97cba82dee66f57ad6",
"balance": {
"hbars": 104.67332072,
"timestamp": "Thu, 25 Apr 2024 17:54:55 GMT",
"tokens": {}
},
"network": "testnet",
"mirrorNodeUrl": "https://testnet.mirrornode.hedera.com"
},
"receipt": {
"status": "SUCCESS",
"accountId": "",
"fileId": "",
"contractId": "0.0.4409710",
"topicId": "",
"tokenId": "",
"scheduleId": "",
"exchangeRate": {
"hbars": 30000,
"cents": 358240,
"expirationTime": "Tue, 04 Jun 2024 16:00:00 GMT",
"exchangeRateInCents": 11.941333333333333
},
"topicSequenceNumber": "0",
"topicRunningHash": "",
"totalSupply": "0",
"scheduledTransactionId": "",
"serials": [],
"duplicates": [],
"children": []
}
}