# Client

The `Client` class is the main entry point for interacting with the Cryptalk network. It provides methods for creating and managing connections, registering identities, and performing actions.

**Constructor**

`constructor(options?: ClientOptions)`: Initializes a new Cryptalk client instance. It is recommended to use the static methods `Client.create` or `Client.build` instead of calling the constructor directly.

**Static Methods**

* `static async create(signer: Signer, options?: ClientOptions): Promise<Client>`: Creates a new client instance with a signer. Use this method to create a client for a user that has a wallet.
* `static async build(identifier: Identifier, options?: ClientOptions): Promise<Client>`: Creates a new client instance with an identifier. Use this method for clients that do not have a signer.

**Properties**

* `options: ClientOptions`: Gets the client options used to initialize the client.
* `signer: Signer | undefined`: Gets the signer associated with this client, if any.
* `isReady: boolean`: Gets whether the client has been initialized.
* `inboxId: string | undefined`: Gets the inbox ID associated with this client.
* `accountIdentifier: Identifier`: Gets the identifier for this client.
* `installationId: string`: Gets the installation ID for this client.
* `installationIdBytes: Uint8Array`: Gets the installation ID as a byte array.
* `conversations: Conversations`: Gets the Conversations instance associated with this client.
* `preferences: Preferences`: Gets the Preferences instance associated with this client.

**Instance Methods**

* `async init(identifier: Identifier): Promise<void>`: Initializes the client with the provided identifier. This method is not intended to be called directly.
* `async unsafe_createInboxSignatureText(): Promise<string | undefined>`: Creates signature text for creating a new inbox. This method should be used with caution, `register` is the preferred method.
* `async unsafe_addAccountSignatureText(newIdentifier: Identifier, allowInboxReassign?: boolean): Promise<string | undefined>`: Creates signature text for adding a new account to the client's inbox. This method should be used with caution, `unsafe_addAccount` is the preferred method.
* `async unsafe_removeAccountSignatureText(identifier: Identifier): Promise<string | undefined>`: Creates signature text for removing an account from the client's inbox. This method should be used with caution, `removeAccount` is the preferred method.
* `async unsafe_revokeAllOtherInstallationsSignatureText(): Promise<string | undefined>`: Creates signature text for revoking all other installations of the client's inbox. This method should be used with caution, `revokeAllOtherInstallations` is the preferred method.
* `async unsafe_revokeInstallationsSignatureText(installationIds: Uint8Array[]): Promise<string | undefined>`: Creates signature text for revoking specific installations of the client's inbox. This method should be used with caution, `revokeInstallations` is the preferred method.
* `async unsafe_changeRecoveryIdentifierSignatureText(identifier: Identifier): Promise<string | undefined>`: Creates signature text for changing the recovery identifier. This method should be used with caution, `changeRecoveryIdentifier` is the preferred method.
* `async unsafe_addSignature(signatureType: SignatureRequestType, signatureText: string, signer: Signer): Promise<void>`: Adds a signature for a specific request type. This method should be used with caution.
* `async unsafe_applySignatures(): Promise<void>`: Applies all pending signatures. This method should be used with caution.
* `async register(): Promise<void>`: Registers the client with the XMTP network.
* `async unsafe_addAccount(newAccountSigner: Signer, allowInboxReassign?: boolean): Promise<void>`: Adds a new account to the client's inbox.
* `async removeAccount(accountIdentifier: Identifier): Promise<void>`: Removes an account from the client's inbox.
* `async revokeAllOtherInstallations(): Promise<void>`: Revokes all other installations of the client's inbox.
* `async revokeInstallations(installationIds: Uint8Array[]): Promise<void>`: Revokes specific installations of the client's inbox.
* `async changeRecoveryIdentifier(identifier: Identifier): Promise<void>`: Changes the recovery identifier for the client's inbox.
* `async isRegistered(): Promise<boolean>`: Checks if the client is registered with the XMTP network.
* `async canMessage(identifiers: Identifier[]): Promise<Map<string, boolean>>`: Checks if the client can message the specified identifiers.
* `static async canMessage(identifiers: Identifier[], env?: XmtpEnv): Promise<Map<string, boolean>>`: Checks if the specified identifiers can be messaged without a client instance.
* `async findInboxIdByIdentifier(identifier: Identifier): Promise<string | undefined>`: Finds the inbox ID for a given identifier.
* `codecFor<T = unknown>(contentType: ContentTypeId): ContentCodec<T> | undefined`: Gets the codec for a given content type.
* `encodeContent(content: unknown, contentType: ContentTypeId): SafeEncodedContent`: Encodes content for a given content type.
* `decodeContent<T = unknown>(message: SafeMessage, contentType: ContentTypeId): T | undefined`: Decodes a message for a given content type.
* `close()`: Terminates the underlying worker.


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