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Merge #12717: [REST] Handle UTXO retrieval when ignoring the mempool 

9cb9af8 [REST] Handle UTXO retrieval when ignoring the mempool (Roman Zeyde)
1fdc7c4 Make CTxMemPool::isSpent() const (Roman Zeyde)

Pull request description:

  Current REST API always returns empty UTXO when invoked without `/checkmempool/` URL part.

  After the fix:
  ```
  $ curl -s http://localhost:8332/rest/getutxos/0e3e2357e806b6cdb1f70b54c3a3a17b6714ee1f0e68bebb44a74b1efd512098-0.json | jq
  {
    "chainHeight": 514109,
    "chaintipHash": "0000000000000000001fe76d1445e8a6432fd2de04261dc9c5915311dc7ad6de",
    "bitmap": "1",
    "utxos": [
      {
        "height": 1,
        "value": 50,
        "scriptPubKey": {
          "asm": "0496b538e853519c726a2c91e61ec11600ae1390813a627c66fb8be7947be63c52da7589379515d4e0a604f8141781e62294721166bf621e73a82cbf2342c858ee OP_CHECKSIG",
          "hex": "410496b538e853519c726a2c91e61ec11600ae1390813a627c66fb8be7947be63c52da7589379515d4e0a604f8141781e62294721166bf621e73a82cbf2342c858eeac",
          "reqSigs": 1,
          "type": "pubkey",
          "addresses": [
            "12c6DSiU4Rq3P4ZxziKxzrL5LmMBrzjrJX"
          ]
        }
      }
    ]
  }
  ```

  Before the fix:
  ```
  $ curl -s http://localhost:8332/rest/getutxos/0e3e2357e806b6cdb1f70b54c3a3a17b6714ee1f0e68bebb44a74b1efd512098-0.json | jq
  {
    "chainHeight": 514109,
    "chaintipHash": "0000000000000000001fe76d1445e8a6432fd2de04261dc9c5915311dc7ad6de",
    "bitmap": "0",
    "utxos": []
  }
  ```

Tree-SHA512: 994a350cb34a3c8f5a7afbc169c6b177c5be6cf223b2071c62d63644819d416d3e10d1c58b244d9d351bae7233d2974aa5e9ebadd1b5d6218f5245558675be0d
This commit is contained in:
Wladimir J. van der Laan 2018-03-27 21:31:27 +02:00
parent 534b8fa560 9cb9af8c41
commit ac898b689c
No known key found for this signature in database
GPG Key ID: 1E4AED62986CD25D
4 changed files with 54 additions and 27 deletions
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38
src/rest.cpp
View File

@ -487,26 +487,28 @@ static bool rest_getutxos(HTTPRequest* req, const std::string& strURIPart)
std::vector<bool> hits;
bitmap.resize((vOutPoints.size() + 7) / 8);
{
LOCK2(cs_main, mempool.cs);
CCoinsView viewDummy;
CCoinsViewCache view(&viewDummy);
CCoinsViewCache& viewChain = *pcoinsTip;
CCoinsViewMemPool viewMempool(&viewChain, mempool);
if (fCheckMemPool)
view.SetBackend(viewMempool); // switch cache backend to db+mempool in case user likes to query mempool
for (size_t i = 0; i < vOutPoints.size(); i++) {
bool hit = false;
Coin coin;
if (view.GetCoin(vOutPoints[i], coin) && !mempool.isSpent(vOutPoints[i])) {
hit = true;
outs.emplace_back(std::move(coin));
auto process_utxos = [&vOutPoints, &outs, &hits](const CCoinsView& view, const CTxMemPool& mempool) {
for (const COutPoint& vOutPoint : vOutPoints) {
Coin coin;
bool hit = !mempool.isSpent(vOutPoint) && view.GetCoin(vOutPoint, coin);
hits.push_back(hit);
if (hit) outs.emplace_back(std::move(coin));
}
};
hits.push_back(hit);
if (fCheckMemPool) {
// use db+mempool as cache backend in case user likes to query mempool
LOCK2(cs_main, mempool.cs);
CCoinsViewCache& viewChain = *pcoinsTip;
CCoinsViewMemPool viewMempool(&viewChain, mempool);
process_utxos(viewMempool, mempool);
} else {
LOCK(cs_main); // no need to lock mempool!
process_utxos(*pcoinsTip, CTxMemPool());
}
for (size_t i = 0; i < hits.size(); ++i) {
const bool hit = hits[i];
bitmapStringRepresentation.append(hit ? "1" : "0"); // form a binary string representation (human-readable for json output)
bitmap[i / 8] |= ((uint8_t)hit) << (i % 8);
}

2
src/txmempool.cpp
View File

@ -339,7 +339,7 @@ CTxMemPool::CTxMemPool(CBlockPolicyEstimator* estimator) :
nCheckFrequency = 0;
}
bool CTxMemPool::isSpent(const COutPoint& outpoint)
bool CTxMemPool::isSpent(const COutPoint& outpoint) const
{
LOCK(cs);
return mapNextTx.count(outpoint);

2
src/txmempool.h
View File

@ -550,7 +550,7 @@ public:
void _clear(); //lock free
bool CompareDepthAndScore(const uint256& hasha, const uint256& hashb);
void queryHashes(std::vector<uint256>& vtxid);
bool isSpent(const COutPoint& outpoint);
bool isSpent(const COutPoint& outpoint) const;
unsigned int GetTransactionsUpdated() const;
void AddTransactionsUpdated(unsigned int n);
/**

39
test/functional/interface_rest.py
View File

@ -85,7 +85,7 @@ class RESTTest (BitcoinTestFramework):
#######################################
# GETUTXOS: query an unspent outpoint #
#######################################
json_request = '/checkmempool/'+txid+'-'+str(n)
json_request = '/'+txid+'-'+str(n)
json_string = http_get_call(url.hostname, url.port, '/rest/getutxos'+json_request+self.FORMAT_SEPARATOR+'json')
json_obj = json.loads(json_string)
@ -100,7 +100,7 @@ class RESTTest (BitcoinTestFramework):
#################################################
# GETUTXOS: now query an already spent outpoint #
#################################################
json_request = '/checkmempool/'+vintx+'-0'
json_request = '/'+vintx+'-0'
json_string = http_get_call(url.hostname, url.port, '/rest/getutxos'+json_request+self.FORMAT_SEPARATOR+'json')
json_obj = json.loads(json_string)
@ -117,7 +117,7 @@ class RESTTest (BitcoinTestFramework):
##################################################
# GETUTXOS: now check both with the same request #
##################################################
json_request = '/checkmempool/'+txid+'-'+str(n)+'/'+vintx+'-0'
json_request = '/'+txid+'-'+str(n)+'/'+vintx+'-0'
json_string = http_get_call(url.hostname, url.port, '/rest/getutxos'+json_request+self.FORMAT_SEPARATOR+'json')
json_obj = json.loads(json_string)
assert_equal(len(json_obj['utxos']), 1)
@ -151,23 +151,48 @@ class RESTTest (BitcoinTestFramework):
txid = self.nodes[0].sendtoaddress(self.nodes[1].getnewaddress(), 0.1)
json_string = http_get_call(url.hostname, url.port, '/rest/tx/'+txid+self.FORMAT_SEPARATOR+"json")
json_obj = json.loads(json_string)
vintx = json_obj['vin'][0]['txid'] # get the vin to later check for utxo (should be spent by then)
# get the spent output to later check for utxo (should be spent by then)
spent = '{}-{}'.format(json_obj['vin'][0]['txid'], json_obj['vin'][0]['vout'])
# get n of 0.1 outpoint
n = 0
for vout in json_obj['vout']:
if vout['value'] == 0.1:
n = vout['n']
spending = '{}-{}'.format(txid, n)
json_request = '/'+txid+'-'+str(n)
json_request = '/'+spending
json_string = http_get_call(url.hostname, url.port, '/rest/getutxos'+json_request+self.FORMAT_SEPARATOR+'json')
json_obj = json.loads(json_string)
assert_equal(len(json_obj['utxos']), 0) #there should be an outpoint because it has just added to the mempool
assert_equal(len(json_obj['utxos']), 0) #there should be no outpoint because it has just added to the mempool
json_request = '/checkmempool/'+txid+'-'+str(n)
json_request = '/checkmempool/'+spending
json_string = http_get_call(url.hostname, url.port, '/rest/getutxos'+json_request+self.FORMAT_SEPARATOR+'json')
json_obj = json.loads(json_string)
assert_equal(len(json_obj['utxos']), 1) #there should be an outpoint because it has just added to the mempool
json_request = '/'+spent
json_string = http_get_call(url.hostname, url.port, '/rest/getutxos'+json_request+self.FORMAT_SEPARATOR+'json')
json_obj = json.loads(json_string)
assert_equal(len(json_obj['utxos']), 1) #there should be an outpoint because its spending tx is not confirmed
json_request = '/checkmempool/'+spent
json_string = http_get_call(url.hostname, url.port, '/rest/getutxos'+json_request+self.FORMAT_SEPARATOR+'json')
json_obj = json.loads(json_string)
assert_equal(len(json_obj['utxos']), 0) #there should be no outpoint because it has just spent (by mempool tx)
self.nodes[0].generate(1)
self.sync_all()
json_request = '/'+spending
json_string = http_get_call(url.hostname, url.port, '/rest/getutxos'+json_request+self.FORMAT_SEPARATOR+'json')
json_obj = json.loads(json_string)
assert_equal(len(json_obj['utxos']), 1) #there should be an outpoint because it was mined
json_request = '/checkmempool/'+spending
json_string = http_get_call(url.hostname, url.port, '/rest/getutxos'+json_request+self.FORMAT_SEPARATOR+'json')
json_obj = json.loads(json_string)
assert_equal(len(json_obj['utxos']), 1) #there should be an outpoint because it was mined
#do some invalid requests
json_request = '{"checkmempool'
response = http_post_call(url.hostname, url.port, '/rest/getutxos'+self.FORMAT_SEPARATOR+'json', json_request, True)