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monerod can now sync from pruned blocks

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If the peer (whether pruned or not itself) supports sending pruned blocks
to syncing nodes, the pruned version will be sent along with the hash
of the pruned data and the block weight. The original tx hashes can be
reconstructed from the pruned txes and theur prunable data hash. Those
hashes and the block weights are hashes and checked against the set of
precompiled hashes, ensuring the data we received is the original data.
It is currently not possible to use this system when not using the set
of precompiled hashes, since block weights can not otherwise be checked
for validity.

This is off by default for now, and is enabled by --sync-pruned-blocks
This commit is contained in:
moneromooo-monero 2019-09-16 12:18:34 +00:00
parent d0d76f771a
commit 8330e772f1
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GPG key ID: 686F07454D6CEFC3
30 changed files with 731 additions and 195 deletions
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33
src/cryptonote_basic/cryptonote_format_utils.cpp
View file

@ -1011,7 +1011,19 @@ namespace cryptonote
crypto::hash get_transaction_prunable_hash(const transaction& t, const cryptonote::blobdata *blobdata)
{
crypto::hash res;
if (t.is_prunable_hash_valid())
{
#ifdef ENABLE_HASH_CASH_INTEGRITY_CHECK
CHECK_AND_ASSERT_THROW_MES(!calculate_transaction_prunable_hash(t, blobdata, res) || t.hash == res, "tx hash cash integrity failure");
#endif
res = t.prunable_hash;
++tx_hashes_cached_count;
return res;
}
++tx_hashes_calculated_count;
CHECK_AND_ASSERT_THROW_MES(calculate_transaction_prunable_hash(t, blobdata, res), "Failed to calculate tx prunable hash");
t.set_prunable_hash(res);
return res;
}
//---------------------------------------------------------------
@ -1047,11 +1059,14 @@ namespace cryptonote
// the tx hash is the hash of the 3 hashes
crypto::hash res = cn_fast_hash(hashes, sizeof(hashes));
t.set_hash(res);
return res;
}
//---------------------------------------------------------------
bool calculate_transaction_hash(const transaction& t, crypto::hash& res, size_t* blob_size)
{
CHECK_AND_ASSERT_MES(!t.pruned, false, "Cannot calculate the hash of a pruned transaction");
// v1 transactions hash the entire blob
if (t.version == 1)
{
@ -1091,8 +1106,7 @@ namespace cryptonote
{
if (!t.is_blob_size_valid())
{
t.blob_size = blob.size();
t.set_blob_size_valid(true);
t.set_blob_size(blob.size());
}
*blob_size = t.blob_size;
}
@ -1112,8 +1126,7 @@ namespace cryptonote
{
if (!t.is_blob_size_valid())
{
t.blob_size = get_object_blobsize(t);
t.set_blob_size_valid(true);
t.set_blob_size(get_object_blobsize(t));
}
*blob_size = t.blob_size;
}
@ -1124,12 +1137,10 @@ namespace cryptonote
bool ret = calculate_transaction_hash(t, res, blob_size);
if (!ret)
return false;
t.hash = res;
t.set_hash_valid(true);
t.set_hash(res);
if (blob_size)
{
t.blob_size = *blob_size;
t.set_blob_size_valid(true);
t.set_blob_size(*blob_size);
}
return true;
}
@ -1206,8 +1217,7 @@ namespace cryptonote
bool ret = calculate_block_hash(b, res);
if (!ret)
return false;
b.hash = res;
b.set_hash_valid(true);
b.set_hash(res);
return true;
}
//---------------------------------------------------------------
@ -1273,8 +1283,7 @@ namespace cryptonote
{
calculate_block_hash(b, *block_hash, &b_blob);
++block_hashes_calculated_count;
b.hash = *block_hash;
b.set_hash_valid(true);
b.set_hash(*block_hash);
}
return true;
}