BNB × SOLANA

// Actual Solana program structure
#[program]
pub mod bnb_solana_bridge {
    pub fn bridge_from_bnb(
        ctx: Context<BridgeFromBnb>,
        amount: u64,
        bnb_tx_hash: [u8; 32],
        validator_signatures: Vec<[u8; 64]>,
    ) -> Result<()>
}

// Real validator implementation
pub struct BridgeValidator {
    solana_client: Arc<RpcClient>,
    bnb_provider: Arc<Provider<Http>>,
    validator_keypair: Arc<Keypair>,
}

async fn monitor_bnb_locks(&self) -> Result<()> {
    // Detect lock events and submit to Solana
}

// Replay protection
#[account]
pub struct ProcessedTx {
    pub is_processed: bool,
    pub bnb_tx_hash: [u8; 32],
    pub timestamp: i64,
}

// Token bridge flow
pub fn bridge_to_bnb(
    ctx: Context<BridgeToBnb>,
    amount: u64,
    bnb_recipient: [u8; 20],
) -> Result<()> {
    token::burn(cpi_ctx, amount)?;
    emit!(BridgeToBnbEvent { ... });
    Ok(())
}