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rpc: fix output distribution caching ignoring chain changes 

0 is placeholder for whole chain, so we should compare chain
height changes rather than chain-height-or-zero. Even this isn't
totally foolproof if a blocks are popped and the same number
added again, but it is much better as it prevents the data from
slowly going out of sync.
This commit is contained in:
moneromooo-monero 2018-10-19 09:20:03 +00:00
parent 5c85da5a73
commit b916ca63a8
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GPG Key ID: 686F07454D6CEFC3
1 changed files with 8 additions and 6 deletions
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14
src/rpc/core_rpc_server.cpp
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@ -2118,6 +2118,8 @@ namespace cryptonote
try try
{ {
// 0 is placeholder for the whole chain
const uint64_t req_to_height = req.to_height ? req.to_height : (m_core.get_current_blockchain_height() - 1);
for (uint64_t amount: req.amounts) for (uint64_t amount: req.amounts)
{ {
static struct D static struct D
@ -2130,7 +2132,7 @@ namespace cryptonote
} d; } d;
boost::unique_lock<boost::mutex> lock(d.mutex); boost::unique_lock<boost::mutex> lock(d.mutex);
if (d.cached && amount == 0 && d.cached_from == req.from_height && d.cached_to == req.to_height) if (d.cached && amount == 0 && d.cached_from == req.from_height && d.cached_to == req_to_height)
{ {
res.distributions.push_back({amount, d.cached_start_height, req.binary, d.cached_distribution, d.cached_base}); res.distributions.push_back({amount, d.cached_start_height, req.binary, d.cached_distribution, d.cached_base});
if (!req.cumulative) if (!req.cumulative)
@ -2145,23 +2147,23 @@ namespace cryptonote
std::vector<uint64_t> distribution; std::vector<uint64_t> distribution;
uint64_t start_height, base; uint64_t start_height, base;
if (!m_core.get_output_distribution(amount, req.from_height, req.to_height, start_height, distribution, base)) if (!m_core.get_output_distribution(amount, req.from_height, req_to_height, start_height, distribution, base))
{ {
error_resp.code = CORE_RPC_ERROR_CODE_INTERNAL_ERROR; error_resp.code = CORE_RPC_ERROR_CODE_INTERNAL_ERROR;
error_resp.message = "Failed to get rct distribution"; error_resp.message = "Failed to get rct distribution";
return false; return false;
} }
if (req.to_height > 0 && req.to_height >= req.from_height) if (req_to_height > 0 && req_to_height >= req.from_height)
{ {
uint64_t offset = std::max(req.from_height, start_height); uint64_t offset = std::max(req.from_height, start_height);
if (offset <= req.to_height && req.to_height - offset + 1 < distribution.size()) if (offset <= req_to_height && req_to_height - offset + 1 < distribution.size())
distribution.resize(req.to_height - offset + 1); distribution.resize(req_to_height - offset + 1);
} }
if (amount == 0) if (amount == 0)
{ {
d.cached_from = req.from_height; d.cached_from = req.from_height;
d.cached_to = req.to_height; d.cached_to = req_to_height;
d.cached_distribution = distribution; d.cached_distribution = distribution;
d.cached_start_height = start_height; d.cached_start_height = start_height;
d.cached_base = base; d.cached_base = base;