Merge pull request #5882

a444f06 blockchain: enforce 10 block age for spending outputs (moneromooo-monero)

2 files changed, 11 insertions, 0 deletions

diff --git a/src/cryptonote_config.h b/src/cryptonote_config.h
index 4147b48ee..53c487d02 100644
--- a/src/cryptonote_config.h
+++ b/src/cryptonote_config.h
@@ -163,6 +163,7 @@
 #define HF_VERSION_MIN_V2_COINBASE_TX           12
 #define HF_VERSION_SAME_MIXIN                   12
 #define HF_VERSION_REJECT_SIGS_IN_COINBASE      12
+#define HF_VERSION_ENFORCE_MIN_AGE              12
 
 #define PER_KB_FEE_QUANTIZATION_DECIMALS        8
 
diff --git a/src/cryptonote_core/blockchain.cpp b/src/cryptonote_core/blockchain.cpp
index 82f7d1423..5cf4952ae 100644
--- a/src/cryptonote_core/blockchain.cpp
+++ b/src/cryptonote_core/blockchain.cpp
@@ -2894,6 +2894,9 @@ bool Blockchain::check_tx_inputs(transaction& tx, tx_verification_context &tvc,
   const auto waiter_guard = epee::misc_utils::create_scope_leave_handler([&]() { waiter.wait(&tpool); });
   int threads = tpool.get_max_concurrency();
 
+  uint64_t max_used_block_height = 0;
+  if (!pmax_used_block_height)
+    pmax_used_block_height = &max_used_block_height;
   for (const auto& txin : tx.vin)
   {
     // make sure output being spent is of type txin_to_key, rather than
@@ -2960,6 +2963,13 @@ bool Blockchain::check_tx_inputs(transaction& tx, tx_verification_context &tvc,
   if (tx.version == 1 && threads > 1)
     waiter.wait(&tpool);
 
+  // enforce min output age
+  if (hf_version >= HF_VERSION_ENFORCE_MIN_AGE)
+  {
+    CHECK_AND_ASSERT_MES(*pmax_used_block_height + CRYPTONOTE_DEFAULT_TX_SPENDABLE_AGE <= m_db->height(),
+        false, "Transaction spends at least one output which is too young");
+  }
+
   if (tx.version == 1)
   {
     if (threads > 1)