arcium-macros

Helper macros for developing Solana programs that integrate with the Arcium network. Reduces boilerplate and enforces correct account structures for encrypted computations.

Available Macros

#[arcium_program]

This attribute is the primary macro for an Arcium-integrated program. It should be used on the module containing your instruction handlers. It wraps Anchor's #[program] attribute and injects additional definitions required by Arcium.

#[arcium_program]
pub mod my_arcium_program {
    // Instruction handlers go here
}

#[queue_computation_accounts]

Use this attribute on an Accounts struct for instructions that queue an MPC computation. It validates the struct and implements the QueueCompAccs trait from arcium_anchor.

#[queue_computation_accounts("my_circuit", payer)]
#[derive(Accounts)]
pub struct QueueMyCircuit<'info> {
    #[account(mut)]
    pub payer: Signer<'info>,
    // ... other required Arcium accounts
}

#[arcium_callback]

This attribute marks a function as the callback handler for a MPC computation. It validates the function name and signature. The function must be named <encrypted_ix>_callback and take exactly one ComputationOutputs argument (outside of the Context arg).

#[arcium_callback(encrypted_ix = "my_circuit")]
pub fn my_circuit_callback(ctx: Context<Callback>, output: ComputationOutputs) -> Result<()> {
    msg!("Computation finished with output: {:?}", output);
    Ok(())
}

#[callback_accounts]

Apply this attribute to an Accounts struct used by a callback instruction. It validates that the struct has the necessary accounts for processing a computation's results.

#[callback_accounts("my_circuit", payer)]
#[derive(Accounts)]
pub struct Callback<'info> {
    #[account(mut)]
    pub payer: Signer<'info>,
    // ... other required Arcium accounts
}

#[init_computation_definition_accounts]

This attribute validates an Accounts struct used to initialize a new ComputationDefinitionAccount on-chain. It also implements the InitCompDefAccs trait from arcium_anchor.

#[init_computation_definition_accounts("my_circuit", payer)]
#[derive(Accounts)]
pub struct InitMyCircuitCompDef<'info> {
    #[account(mut)]
    pub payer: Signer<'info>,
    // ... other required Arcium accounts
}