Serialising/deserialising data on android

Question

I am currently going though the Solana development course and I try to adapt what I learn onto an Android application. Everything is going great so far but now I am stuck when I try to serialise/deserialise data. I've tried to use Kotlin serialization to convert my data class into ByteArray with the following code: Json.encodeToString(data).encodeToByteArray().

However I get an error saying that

' Program logged: "panicked at 'called Result::unwrap() on an Err value: Custom { kind: InvalidInput, error: "Unexpected length of input" }', src/instruction.rs:34:59"'

And when I try to deserialise the data as follow val movies = connection.getProgramAccounts( serializer = BorshAsBase64JsonArraySerializer(MovieDe.serializer()), account = PublicKey("CenYq6bDRB7p73EjsPEpiYN7uveyPUTdXkDkgUduboaN"), programAccountConfig = ProgramAccountConfig())

I've got the following error:

java.lang.OutOfMemoryError: Failed to allocate a 1866989584 byte allocation with 2097152 free bytes and 184MB until OOM, target footprint 10037792, growth limit 201326592

Would anybody have some advice on how to serialise/deserialise data on Android? Thanks in advance for your help and advice.

Answer 1

the way you are deserializing your data is incorrect. You need to use the data struct of the account to serialize/deserialize it.

You need to create a data struct or if you are using an open source program with typescript bindings, you can find the program account data structs in program/js/src/accounts. Example from Metaplex Hydra. Import this file into your code to get deserialized data:

import { accountBeet } from './location/of/beet'
const account = new PublicKey(account);
let { data } = (await connection.getAccountInfo(account)) || {};
const deserialize = accountBeet.deserialize(data)[0];