Passkey Login | Alchemy Docs

If a user has added a passkey to their account, or they initially signed up with a passkey, you can easily log them in with that passkey.

Authenticate a user with email and passkey

If you want to allow sign-up and login with a passkey, you can ask the user for an email to associate with their passkey. This way, they can log in with their email and passkey in the future. Under the hood, the email is also used to check if an account exists already so you can have a unified sign-up and login flow.

It’s important that you validate this email before creating an account for the user. This is to prevent users from losing access to their wallets if they lose their device.

import { import signer
signer } from "./signer";

const const result: any
result = await import signer
signer.any
authenticate({
  type: string
type: "passkey",
  email: string
email: "[email protected]",
});

import { class AlchemyWebSignerA SmartAccountSigner that can be used with any SmartContractAccount
AlchemyWebSigner } from "@account-kit/signer";

export const const signer: AlchemyWebSigner
signer = new new AlchemyWebSigner(params: AlchemySignerParams): AlchemyWebSignerInitializes an instance with the provided Alchemy signer parameters after parsing them with a schema.
AlchemyWebSigner({
  client: ({
    connection: {
        apiKey: string;
        rpcUrl?: undefined;
        jwt?: undefined;
    } | {
        jwt: string;
        rpcUrl?: undefined;
        apiKey?: undefined;
    } | {
        rpcUrl: string;
        apiKey?: undefined;
        jwt?: undefined;
    } | {
        rpcUrl: string;
        jwt: string;
        apiKey?: undefined;
    };
    ... 4 more ...;
    enablePopupOauth?: boolean | undefined;
} | AlchemySignerWebClient) & (AlchemySignerWebClient | ... 1 more ... | undefined)
client: {
    connection: {
    apiKey: string;
}
connection: {
      apiKey: string
apiKey: "API_KEY",
    },
    iframeConfig: {
    iframeContainerId: string;
}
iframeConfig: {
      iframeContainerId: string
iframeContainerId: "alchemy-signer-iframe-container",
    },
  },
});

Authenticate an anonymous user

import { import signer
signer } from "./signer";

const const result: any
result = await import signer
signer.any
authenticate({
  type: string
type: "passkey",
  createNew: boolean
createNew: false,
});

import { class AlchemyWebSignerA SmartAccountSigner that can be used with any SmartContractAccount
AlchemyWebSigner } from "@account-kit/signer";

export const const signer: AlchemyWebSigner
signer = new new AlchemyWebSigner(params: AlchemySignerParams): AlchemyWebSignerInitializes an instance with the provided Alchemy signer parameters after parsing them with a schema.
AlchemyWebSigner({
  client: ({
    connection: {
        apiKey: string;
        rpcUrl?: undefined;
        jwt?: undefined;
    } | {
        jwt: string;
        rpcUrl?: undefined;
        apiKey?: undefined;
    } | {
        rpcUrl: string;
        apiKey?: undefined;
        jwt?: undefined;
    } | {
        rpcUrl: string;
        jwt: string;
        apiKey?: undefined;
    };
    ... 4 more ...;
    enablePopupOauth?: boolean | undefined;
} | AlchemySignerWebClient) & (AlchemySignerWebClient | ... 1 more ... | undefined)
client: {
    connection: {
    apiKey: string;
}
connection: {
      apiKey: string
apiKey: "API_KEY",
    },
    iframeConfig: {
    iframeContainerId: string;
}
iframeConfig: {
      iframeContainerId: string
iframeContainerId: "alchemy-signer-iframe-container",
    },
  },
});