grantPermissions

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import { grantPermissions } from "@account-kit/wallet-client";

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// Create a session key and grant root permissions
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const sessionKey = LocalAccountSigner.generatePrivateKeySigner();
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const account = await client.requestAccount();
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const permissions = await client.grantPermissions({
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  account: account.address,
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  expirySec: Math.floor(Date.now() / 1000) + 60 * 60, // 1 hour from now
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  key: {
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    publicKey: await sessionKey.getAddress(),
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    type: "secp256k1",
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  },
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  permissions: [{ type: "root" }],
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});
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// Use the permissions to prepare a call
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const preparedCalls = await client.prepareCalls({
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  calls: [{ to: zeroAddress, value: "0x0" }],
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  from: account.address,
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  capabilities: {
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    paymasterService: {
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      policyId: "your-paymaster-policy-id",
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    },
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    permissions,
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  },
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});
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// Sign with the session key
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const signedCalls = await signPreparedCalls(sessionKey, preparedCalls);
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// Send the prepared call using the session key
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const result = await client.sendPreparedCalls({
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  ...signedCalls,
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  capabilities: {
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    permissions,
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  },
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});