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-rw-r--r--src/node/utxo_snapshot.h56
1 files changed, 55 insertions, 1 deletions
diff --git a/src/node/utxo_snapshot.h b/src/node/utxo_snapshot.h
index 1160bb55f0..256a4a601d 100644
--- a/src/node/utxo_snapshot.h
+++ b/src/node/utxo_snapshot.h
@@ -6,16 +6,22 @@
#ifndef BITCOIN_NODE_UTXO_SNAPSHOT_H
#define BITCOIN_NODE_UTXO_SNAPSHOT_H
+#include <chainparams.h>
+#include <kernel/chainparams.h>
#include <kernel/cs_main.h>
#include <serialize.h>
#include <sync.h>
#include <uint256.h>
+#include <util/chaintype.h>
#include <util/fs.h>
#include <cstdint>
#include <optional>
#include <string_view>
+// UTXO set snapshot magic bytes
+static constexpr std::array<uint8_t, 5> SNAPSHOT_MAGIC_BYTES = {'u', 't', 'x', 'o', 0xff};
+
class Chainstate;
namespace node {
@@ -23,10 +29,14 @@ namespace node {
//! assumeutxo Chainstate can be constructed.
class SnapshotMetadata
{
+ const uint16_t m_version{1};
+ const std::set<uint16_t> m_supported_versions{1};
public:
//! The hash of the block that reflects the tip of the chain for the
//! UTXO set contained in this snapshot.
uint256 m_base_blockhash;
+ uint32_t m_base_blockheight;
+
//! The number of coins in the UTXO set contained in this snapshot. Used
//! during snapshot load to estimate progress of UTXO set reconstruction.
@@ -35,11 +45,55 @@ public:
SnapshotMetadata() { }
SnapshotMetadata(
const uint256& base_blockhash,
+ const int base_blockheight,
uint64_t coins_count) :
m_base_blockhash(base_blockhash),
+ m_base_blockheight(base_blockheight),
m_coins_count(coins_count) { }
- SERIALIZE_METHODS(SnapshotMetadata, obj) { READWRITE(obj.m_base_blockhash, obj.m_coins_count); }
+ template <typename Stream>
+ inline void Serialize(Stream& s) const {
+ s << SNAPSHOT_MAGIC_BYTES;
+ s << m_version;
+ s << Params().MessageStart();
+ s << m_base_blockheight;
+ s << m_base_blockhash;
+ s << m_coins_count;
+ }
+
+ template <typename Stream>
+ inline void Unserialize(Stream& s) {
+ // Read the snapshot magic bytes
+ std::array<uint8_t, SNAPSHOT_MAGIC_BYTES.size()> snapshot_magic;
+ s >> snapshot_magic;
+ if (snapshot_magic != SNAPSHOT_MAGIC_BYTES) {
+ throw std::ios_base::failure("Invalid UTXO set snapshot magic bytes. Please check if this is indeed a snapshot file or if you are using an outdated snapshot format.");
+ }
+
+ // Read the version
+ uint16_t version;
+ s >> version;
+ if (m_supported_versions.find(version) == m_supported_versions.end()) {
+ throw std::ios_base::failure(strprintf("Version of snapshot %s does not match any of the supported versions.", version));
+ }
+
+ // Read the network magic (pchMessageStart)
+ MessageStartChars message;
+ s >> message;
+ if (!std::equal(message.begin(), message.end(), Params().MessageStart().data())) {
+ auto metadata_network = GetNetworkForMagic(message);
+ if (metadata_network) {
+ std::string network_string{ChainTypeToString(metadata_network.value())};
+ throw std::ios_base::failure(strprintf("The network of the snapshot (%s) does not match the network of this node (%s).", network_string, Params().GetChainTypeString()));
+ } else {
+ throw std::ios_base::failure("This snapshot has been created for an unrecognized network. This could be a custom signet, a new testnet or possibly caused by data corruption.");
+ }
+ }
+
+ s >> m_base_blockheight;
+ s >> m_base_blockhash;
+ s >> m_coins_count;
+ }
};
//! The file in the snapshot chainstate dir which stores the base blockhash. This is