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You were very close! OptionSerializer implements From on Option: https://docs.rs/solana-transaction-status/1.14.7/solana_transaction_status/option_serializer/enum.OptionSerializer.html#impl-From%3COp …

As the answer mentions, the Rust team reserves the right to change what repr(rust) means at any time, so structs that use repr(rust) do not have a stable layout in memory. … Otherwise, if a program is upgraded between two versions of Rust with a breaking change to repr(rust), it might not be able to deserialize its own account data. …

If you want them to be dependent on each other, you'll need to include both of them in the same instruction, meaning: #[program] mod hello_anchor { use super::*; pub fn init_all(ctx: Context<I …

There's no way to cut down on hardware requirements for the node, but there are many services that rent nodes out if you need. In the longterm, the best option is to use a Geyser plugin, but the ecosy …

You mention the Rust Anchor Framework, but that's only used for on-chain programs. If you're trying to fetch a past transaction, you don't need Anchor, just the JSON RPC API. …

If you want to manage the tokens entirely, you can go with the managed-token approach, which keeps the token frozen at all times, and must pass through your program, which thaws, does something (burn …

Your best bet is to read through the confidential token documentation, which provides all of the required proofs and further documentation. Here's the documentation on the equality proofs: https://spl …

In normal cases, the build artifacts are cached, like with normal cargo. For example, if you try to build the SPL token program at https://github.com/solana-labs/solana-program-library/tree/master/tok …

Make sure that player has at least bet_amount, otherwise you'll be doing an overflowing subtraction, which means that you could be setting player's lamports to a huge number close to u64::MAX! Also, b …

When you use a vector in your program, you're using the heap provided by the runtime, which maxes out at 32KB. So when you keep pushing to data, you can eventually run out of heap space. Normally, the …

The MerkleTree in your Tree struct also needs to implement the BorshSerialize and BorshDeserialize traits in order to work. You may need to create a new struct that can convert between the external Me …

This is a guess, since the error message is confusing, but you should try to make sure that your type aligns on an address of 1 using arrays, ie: #[zero_copy] #[repr(C)] #[derive(Debug, Default)] pub …

The error that you're getting is unfortunately a bit vague: Data type mismatch: https://github.com/metaplex-foundation/mpl-token-metadata/blob/64ba3cb8937dff668a5e1926d3beaf694ea6f3dc/programs/token-m …

You're seeing this error because of a breaking change in the Solana SDK in version 1.16. The older versions of mpl-token-metadata don't support 1.16 yet, so mixing them will cause build errors. In the …

This is totally normal unfortunately. If you're using the TPU client directly, then you're sending the transactions directly to the leader to try and get your transaction included in the block. Your T …