blvm-consensus 0.1.12

Bitcoin Commons BLVM: Direct mathematical implementation of Bitcoin consensus rules from the Orange Paper
Documentation 
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//! Test for txid cache key completeness
//!
//! This test verifies that the cache key for calculate_tx_id includes ALL
//! transaction fields that affect the txid, preventing cache collisions.

use blvm_consensus::block::calculate_tx_id;
use blvm_consensus::types::*;

#[test]
fn test_cache_key_includes_script_pubkey() {
    // Create two transactions with same inputs and value but DIFFERENT script_pubkey
    // They must have different txids and different cache keys
    
    let tx1 = Transaction {
        version: 1,
        inputs: vec![TransactionInput {
            prevout: OutPoint {
                hash: [0u8; 32],
                index: 0,
            },
            script_sig: vec![0x04, 0xff, 0xff, 0x00, 0x1d, 0x01, 0x0b],
            sequence: 0xffffffff,
        }].into_boxed_slice(),
        outputs: vec![TransactionOutput {
            value: 50_0000_0000,
            script_pubkey: vec![0x43, 0x41, 0x04, 0x72, 0x11, 0xa8, 0x24, 0xf5, 0x5b, 0x50, 0x52, 0x28, 0xe4, 0xc3, 0xd5, 0x19, 0x4c, 0x1f, 0xcf, 0xaa, 0x15, 0xa4, 0x56, 0xab, 0xdf, 0x37, 0xf9, 0xb9, 0xd9, 0x7a, 0x40, 0x40, 0xaf, 0xc0, 0x73, 0xde, 0xe6, 0xc8],
        }].into_boxed_slice(),
        lock_time: 0,
    };
    
    let tx2 = Transaction {
        version: 1,
        inputs: vec![TransactionInput {
            prevout: OutPoint {
                hash: [0u8; 32],
                index: 0,
            },
            script_sig: vec![0x04, 0xff, 0xff, 0x00, 0x1d, 0x01, 0x0b], // Same
            sequence: 0xffffffff,
        }].into_boxed_slice(),
        outputs: vec![TransactionOutput {
            value: 50_0000_0000, // Same value
            script_pubkey: vec![0x43, 0x41, 0x04, 0x97, 0x73, 0x67, 0x16, 0x4c, 0xa2, 0x4f, 0x1f, 0x2d, 0xe2, 0xe2, 0xcf, 0xb9, 0xe5, 0xc3, 0xf2, 0x2d, 0x51, 0x0d, 0x3f, 0x33, 0x68, 0x3d, 0xe2, 0x00, 0x28, 0x31, 0x00, 0xaf, 0x0c, 0x86, 0x67, 0xdb, 0xa7, 0xe4], // DIFFERENT script_pubkey
        }].into_boxed_slice(),
        lock_time: 0,
    };
    
    // Calculate txids
    let tx1_id = calculate_tx_id(&tx1);
    let tx2_id = calculate_tx_id(&tx2);
    
    // They MUST be different (different script_pubkey)
    assert_ne!(tx1_id, tx2_id, 
               "Transactions with different script_pubkey must have different txids");
    
    // Verify they match expected values (from actual Bitcoin blocks)
    let expected_tx1 = hex::decode("d5fdcc541e25de1c7a5addedf24858b8bb665c9f36ef744ee42c316022c90f9b").unwrap();
    let expected_tx2 = hex::decode("442ee91b2b999fb15d61f6a88ecf2988e9c8ed48f002476128e670d3dac19fe7").unwrap();
    
    // Note: These are the actual txids from blocks 2 and 16
    // If our implementation matches, these should match (or at least be different from each other)
    assert_ne!(tx1_id, tx2_id, "Must have different txids");
}