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:
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.
Displays the MetaMask dialog box for the message to sign.
Signs the given message using the private key of the user.
Returns the signature as response.
Some example responses:
For a hedera account id 0.0.3581604:
const snapId = `npm:@hashgraph/hedera-wallet-snap`
const signMessageAPI = async () => {
const externalAccountParams = {
externalAccount: {
accountIdOrEvmAddress: '0.0.12345',
curve: 'ED25519'
}
}
await window.ethereum.request({
method: 'wallet_invokeSnap',
params: {
snapId,
request: {
method: 'signMessage',
params: {
network: 'testnet',
message: 'Hello there, this is a sample message. ',
/*
Uncomment the below line if you want to connect
to a non-metamask account
*/
// ...externalAccountParams
}
}
}
})
}You can also check out the API reference to learn how each API works.
{
"currentAccount": {
"metamaskEvmAddress": "0x0b3628d1b838993b5fceec8b2a26502e7a8e5241",
"externalEvmAddress": "",
"hederaAccountId": "0.0.3581604",
"hederaEvmAddress": "0xca53f9c93d30e0b7212d67901e5a24fb090d542b",
"publicKey": "0x0206022cea4c6dd6d2e7263b8802253971de922f5380661d97cba82dee66f57ad6",
"balance": {
"hbars": 5.67332072,
"timestamp": "Wed, 13 Mar 2024 20:37:05 GMT",
"tokens": {
"0.0.3590430": {
"balance": 1,
"decimals": 1,
"tokenId": "0.0.3590430",
"name": "Token1",
"symbol": "KP1",
"tokenType": "FUNGIBLE_COMMON",
"supplyType": "INFINITE",
"totalSupply": "100",
"maxSupply": "0"
}
}
},
"network": "testnet",
"mirrorNodeUrl": "https://testnet.mirrornode.hedera.com"
},
"signature": "0x6ecceeaf7e3b81151893827b123a6409445d625dee9c986f29044aa979cf992f0fc3ef426655bc0a074c7de59bec742c72faf00bc5f594316836d2c64ea81e0f1b"
}