Session Keys (SDK)

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import { createSmartWalletClient } from "@account-kit/wallet-client";
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import { alchemy, arbitrumSepolia } from "@account-kit/infra";
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import { LocalAccountSigner } from "@aa-sdk/core";
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const signer = LocalAccountSigner.privateKeyToAccountSigner(PRIVATE_KEY); // we use a private key signer as an example here
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const transport = alchemy({
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  apiKey: ALCHEMY_API_KEY, // use your Alchemy app api key here
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});
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const client = createSmartWalletClient({
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  transport,
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  chain: arbitrumSepolia, // use any chain imported from @account-kit/infra here
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  signer,
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});

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const signerAddress = await signer.getAddress();
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// This is where you would use your session key signer!
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const sessionKey = LocalAccountSigner.generatePrivateKeySigner();
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const permissions = await client.grantPermissions({
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  account: signerAddress,
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  expirySec: Math.floor(Date.now() / 1000) + 60 * 60,
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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" }], // Here we grant root permissions as an example, but this is not advised in production!
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});

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import { signPreparedCalls } from "@account-kit/wallet-client";
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const preparedCalls = await client.prepareCalls({
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  calls: [{ to: "0x0000000000000000000000000000000000000000", value: "0x0" }],
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  from: signerAddress,
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  capabilities: {
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    paymasterService: {
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      policyId: GAS_MANAGER_POLICY_ID, // put your gas manager policy ID here
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    },
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    permissions,
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  },
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});
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const signedCalls = await signPreparedCalls(
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  sessionKey, // Note that we now sign with the session key!
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  preparedCalls,
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);
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const { preparedCallIds } = 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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});
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// Check calls status.
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const status = await client.getCallsStatus(preparedCallIds[0]);