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Fix transfers to support mixins

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Implement BlockchainLMDB::get_output_global_index()
- returns global output index for a given amount and amount output
  index.

Add information to debug statement for failed ring signature check
within Blockchain::check_tx_inputs()

Fixes bitmonerod RPC call "/getrandom_outs.bin" to return correct
output keys, used in creating a transaction with mixins.

TODO: get_output_global_index() could be refactored with part of
get_output_tx_and_index() as the latter uses the former's
functionality.  Keep track of LMDB read transaction.
This commit is contained in:
warptangent 2015-01-09 13:01:22 -08:00
parent d045dfa7ce
commit 4eba21fd48
No known key found for this signature in database
GPG key ID: 0E490BEBFBE4E92D
2 changed files with 42 additions and 3 deletions
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43
src/cryptonote_core/BlockchainDB_impl/db_lmdb.cpp
View file

@ -477,7 +477,44 @@ tx_out BlockchainLMDB::output_from_blob(const blobdata& blob) const
uint64_t BlockchainLMDB::get_output_global_index(const uint64_t& amount, const uint64_t& index) const
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
return 0;
check_open();
txn_safe txn;
if (mdb_txn_begin(m_env, NULL, MDB_RDONLY, txn))
throw0(DB_ERROR("Failed to create a transaction for the db"));
lmdb_cur cur(txn, m_output_amounts);
MDB_val_copy<uint64_t> k(amount);
MDB_val v;
auto result = mdb_cursor_get(cur, &k, &v, MDB_SET);
if (result == MDB_NOTFOUND)
throw1(OUTPUT_DNE("Attempting to get an output index by amount and amount index, but amount not found"));
else if (result)
throw0(DB_ERROR("DB error attempting to get an output"));
size_t num_elems = 0;
mdb_cursor_count(cur, &num_elems);
if (num_elems <= index)
throw1(OUTPUT_DNE("Attempting to get an output index by amount and amount index, but output not found"));
mdb_cursor_get(cur, &k, &v, MDB_FIRST_DUP);
for (uint64_t i = 0; i < index; ++i)
{
mdb_cursor_get(cur, &k, &v, MDB_NEXT_DUP);
}
mdb_cursor_get(cur, &k, &v, MDB_GET_CURRENT);
uint64_t glob_index = *(const uint64_t*)v.mv_data;
cur.close();
txn.commit();
return glob_index;
}
void BlockchainLMDB::check_open() const
@ -1123,11 +1160,13 @@ crypto::public_key BlockchainLMDB::get_output_key(const uint64_t& amount, const
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
check_open();
uint64_t glob_index = get_output_global_index(amount, index);
txn_safe txn;
if (mdb_txn_begin(m_env, NULL, MDB_RDONLY, txn))
throw0(DB_ERROR("Failed to create a transaction for the db"));
MDB_val_copy<uint64_t> k(get_output_global_index(amount, index));
MDB_val_copy<uint64_t> k(glob_index);
MDB_val v;
auto get_result = mdb_get(txn, m_output_keys, &k, &v);
if (get_result == MDB_NOTFOUND)

2
src/cryptonote_core/blockchain.cpp
View file

@ -1849,7 +1849,7 @@ bool Blockchain::check_tx_inputs(const transaction& tx, uint64_t* pmax_used_bloc
// signature spending it.
if(!check_tx_input(in_to_key, tx_prefix_hash, tx.signatures[sig_index], pmax_used_block_height))
{
LOG_PRINT_L0("Failed to check ring signature for tx " << get_transaction_hash(tx));
LOG_PRINT_L0("Failed to check ring signature for tx " << get_transaction_hash(tx) << " vin key with k_image: " << in_to_key.k_image << " sig_index: " << sig_index << " *pmax_used_block_height: " << *pmax_used_block_height);
return false;
}