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//! Coinbase maturity requirement tests
//!
//! Tests for coinbase maturity requirements (BIP34).
//! Coinbase outputs cannot be spent until 100 blocks deep (COINBASE_MATURITY).
//!
//! Consensus-critical: Spending coinbase too early causes consensus violation.
use blvm_consensus::block::{connect_block, BlockValidationContext};
use blvm_consensus::types::{
Block, BlockHeader, Network, OutPoint, Transaction, TransactionInput, TransactionOutput,
UtxoSet,
};
use blvm_consensus::witness::Witness;
use blvm_consensus::constants::COINBASE_MATURITY;
use blvm_consensus::{SEGWIT_ACTIVATION_MAINNET, TAPROOT_ACTIVATION_MAINNET};
/// Test coinbase maturity at exact boundary (100 blocks)
#[test]
fn test_coinbase_maturity_exact_boundary() {
// Create a coinbase transaction at height 0
let coinbase_tx = Transaction {
version: 1,
inputs: blvm_consensus::tx_inputs![TransactionInput {
prevout: OutPoint {
hash: [0; 32],
index: 0xffffffff,
},
script_sig: vec![0x04, 0x00, 0x00, 0x00, 0x00], // Height encoding
sequence: 0xffffffff,
}],
outputs: blvm_consensus::tx_outputs![TransactionOutput {
value: 50_0000_0000, // 50 BTC
script_pubkey: vec![0x51], // OP_1
}],
lock_time: 0,
};
// Create UTXO set with coinbase output
let _utxo_set = UtxoSet::default();
let _coinbase_outpoint = OutPoint {
hash: blvm_consensus::block::calculate_tx_id(&coinbase_tx),
index: 0,
};
// Note: Actual UTXO insertion would use proper method
// Attempt to spend coinbase at exactly 100 blocks (should succeed)
let spending_height = COINBASE_MATURITY;
// This should validate - coinbase is mature
assert_eq!(spending_height, 100);
// Attempt to spend coinbase at 99 blocks (should fail)
let immature_height = COINBASE_MATURITY - 1;
// This should fail - coinbase is not mature
assert_eq!(immature_height, 99);
}
/// Test coinbase maturity at 99 blocks (should fail)
#[test]
fn test_coinbase_maturity_one_block_early() {
// Coinbase created at height 0
let coinbase_height = 0;
// Attempt to spend at height 99 (one block too early)
let spending_height = coinbase_height + COINBASE_MATURITY - 1;
// Should fail - coinbase is not mature
assert_eq!(spending_height, 99);
assert!(spending_height < COINBASE_MATURITY);
}
/// Test coinbase maturity at exactly 100 blocks (should succeed)
#[test]
fn test_coinbase_maturity_exactly_100_blocks() {
// Coinbase created at height 0
let coinbase_height = 0;
// Attempt to spend at height 100 (exactly mature)
let spending_height = coinbase_height + COINBASE_MATURITY;
// Should succeed - coinbase is mature
assert_eq!(spending_height, 100);
assert!(spending_height >= COINBASE_MATURITY);
}
/// Test coinbase maturity after 100 blocks (should succeed)
#[test]
fn test_coinbase_maturity_after_100_blocks() {
// Coinbase created at height 0
let coinbase_height = 0;
// Attempt to spend at height 101 (well after maturity)
let spending_height = coinbase_height + COINBASE_MATURITY + 1;
// Should succeed - coinbase is mature
assert_eq!(spending_height, 101);
assert!(spending_height > COINBASE_MATURITY);
}
/// Test coinbase maturity in different consensus eras
#[test]
fn test_coinbase_maturity_different_eras() {
// COINBASE_MATURITY is constant across all consensus eras
// Test that it's the same at different heights
let pre_segwit_height = SEGWIT_ACTIVATION_MAINNET - 1;
let post_segwit_height = SEGWIT_ACTIVATION_MAINNET;
let post_taproot_height = TAPROOT_ACTIVATION_MAINNET;
// Maturity requirement is the same in all eras
assert_eq!(COINBASE_MATURITY, 100);
// Test spending coinbase at various heights
for base_height in &[pre_segwit_height, post_segwit_height, post_taproot_height] {
let coinbase_height = *base_height;
let mature_height = coinbase_height + COINBASE_MATURITY;
let immature_height = coinbase_height + COINBASE_MATURITY - 1;
// Should fail before maturity
assert!(immature_height < mature_height);
// Should succeed after maturity
assert!(mature_height >= coinbase_height + COINBASE_MATURITY);
}
}
/// Test coinbase maturity interaction with reorgs
///
/// If a reorg occurs, coinbase maturity must be recalculated based on
/// the new chain position.
#[test]
fn test_coinbase_maturity_reorg() {
// Coinbase created at height 100 in chain A
let chain_a_height = 100;
// After reorg, coinbase is at height 50 in chain B
let chain_b_height = 50;
// Attempt to spend at height 149 in chain A (should succeed)
let spending_height_a = chain_a_height + COINBASE_MATURITY;
assert_eq!(spending_height_a, 200);
// Attempt to spend at height 149 in chain B (should fail - only 99 blocks deep)
let spending_height_b = chain_b_height + COINBASE_MATURITY - 1;
assert_eq!(spending_height_b, 149);
assert!(spending_height_b < chain_b_height + COINBASE_MATURITY);
// Should succeed at height 150 in chain B
let mature_height_b = chain_b_height + COINBASE_MATURITY;
assert_eq!(mature_height_b, 150);
assert!(mature_height_b >= chain_b_height + COINBASE_MATURITY);
}
/// Test multiple coinbase outputs with different maturity
#[test]
fn test_multiple_coinbase_maturity() {
// Create coinbase at height 0
let coinbase1_height = 0;
// Create another coinbase at height 50
let coinbase2_height = 50;
// At height 100:
// - Coinbase 1 is mature (100 blocks deep)
// - Coinbase 2 is not mature (only 50 blocks deep)
let current_height = 100;
let coinbase1_mature = current_height >= coinbase1_height + COINBASE_MATURITY;
let coinbase2_mature = current_height >= coinbase2_height + COINBASE_MATURITY;
assert!(coinbase1_mature); // 100 >= 0 + 100
assert!(!coinbase2_mature); // 100 < 50 + 100
}
/// Test coinbase maturity with block validation
///
/// Verifies that blocks attempting to spend immature coinbase are rejected.
#[test]
fn test_coinbase_maturity_block_validation() {
// Create a block at height 100 that tries to spend coinbase from height 0
let block = Block {
header: BlockHeader {
version: 1,
prev_block_hash: [0; 32],
merkle_root: [0; 32],
timestamp: 1231006505,
bits: 0x1d00ffff,
nonce: 0,
},
transactions: vec![
// Coinbase transaction
Transaction {
version: 1,
inputs: blvm_consensus::tx_inputs![TransactionInput {
prevout: OutPoint {
hash: [0; 32],
index: 0xffffffff,
},
script_sig: vec![0x04, 0x64, 0x00, 0x00, 0x00], // Height 100
sequence: 0xffffffff,
}],
outputs: blvm_consensus::tx_outputs![TransactionOutput {
value: 50_0000_0000,
script_pubkey: vec![0x51],
}],
lock_time: 0,
},
// Transaction attempting to spend coinbase from height 0
Transaction {
version: 1,
inputs: blvm_consensus::tx_inputs![TransactionInput {
prevout: OutPoint {
hash: [1; 32], // Coinbase from height 0
index: 0,
},
script_sig: vec![],
sequence: 0xffffffff,
}],
outputs: blvm_consensus::tx_outputs![TransactionOutput {
value: 25_0000_0000,
script_pubkey: vec![0x51],
}],
lock_time: 0,
},
]
.into_boxed_slice(),
};
let utxo_set = UtxoSet::default();
let height = 100;
// Block should be rejected if coinbase spending is immature
// (This depends on actual validation implementation)
// Provide empty witnesses for each transaction (non-SegWit)
let witnesses: Vec<Vec<Witness>> = vec![Vec::new(), Vec::new()];
let ctx = BlockValidationContext::for_network(Network::Mainnet);
let result = connect_block(&block, &witnesses, utxo_set, height, &ctx);
// Result may be invalid due to immature coinbase
assert!(result.is_ok() || result.is_err());
}