refactor: use shared toHex utility

Author: ovitrif

app/src/main/java/to/bitkit/ext/ByteArray.kt

@@ -1,26 +1,13 @@
 package to.bitkit.ext
 
-import java.security.MessageDigest
 import kotlin.io.encoding.Base64
-import kotlin.io.encoding.ExperimentalEncodingApi
 
-// region hex
-@OptIn(ExperimentalStdlibApi::class)
 fun ByteArray.toHex(): String = this.toHexString()
 
-@OptIn(ExperimentalStdlibApi::class)
 fun String.fromHex(): ByteArray = this.hexToByteArray()
-// endregion
 
-@OptIn(ExperimentalEncodingApi::class)
 fun ByteArray.toBase64(): String = Base64.encode(this)
 
-@OptIn(ExperimentalEncodingApi::class)
 fun String.fromBase64(): ByteArray = Base64.decode(this)
 
 val String.uByteList get() = this.toByteArray().map { it.toUByte() }
-
-fun ByteArray.toSha256(): ByteArray {
-    val digest = MessageDigest.getInstance("SHA-256")
-    return digest.digest(this)
-}

app/src/main/java/to/bitkit/services/RNBackupClient.kt

@@ -23,6 +23,7 @@ import to.bitkit.data.keychain.Keychain
 import to.bitkit.di.IoDispatcher
 import to.bitkit.di.json
 import to.bitkit.env.Env
+import to.bitkit.ext.toHex
 import to.bitkit.utils.AppError
 import to.bitkit.utils.Crypto
 import to.bitkit.utils.Logger
@@ -295,10 +296,6 @@ class RNBackupClient @Inject constructor(
 
         return cipher.doFinal(ciphertext + tag)
     }
-
-    private fun ByteArray.toHex(): String {
-        return this.joinToString("") { "%02x".format(it) }
-    }
 }
 
 @Serializable