Custom Storage Client

Overview

The StorageClient interface is designed to be implemented by platform-specific storage solutions, such as SQLite, ObjectBox, Custom Hardware or FileSystem. This interface allows the Mobile SDK to interact with the storage layer without being tied to a specific implementation.

This guide provides a demo implementation of in-memory client. This is useful for testing or development purposes, but it is not suitable for production use. But we can create a custom storage provider to persist data.

Implementing a Custom StorageClient

App.tsx

package com.silencelaboratories.silentshard

import com.silencelaboratories.storage.StorageClient
import com.silencelaboratories.storage.silentshard.ReconcileStoreDao

class CustomStorageClient : StorageClient<ReconcileStoreDao> {

    /**
     * Representing in-memory database. In real world it should be some SQL based DB or
     * secure storage or custom hardware. It's up to the implementation app's use-case.
     *
     * */
    private val keyshareDaoSet = mutableSetOf<ReconcileStoreDao>()

    /**
     * Write all the fields of ReconcileStoreDao to the storage. The dao contains the
     * current state of the keyshare from SDKs POV.
     * */
    override suspend fun write(
        dao: ReconcileStoreDao,
    ) {
        // Write to storage.
        if (!keyshareDaoSet.add(dao)) {
            keyshareDaoSet.remove(dao)
            keyshareDaoSet.add(dao)
        }
    }

    /**
     * Read all the fields of ReconcileStoreDao from the storage. The dao contains the
     * current state of the keyshare.
     * */
    override suspend fun read(
        key: String,
    ): ReconcileStoreDao? {
        // Read from storage.
        return keyshareDaoSet.find { it.keyId == key }
    }

}