aboutsummaryrefslogtreecommitdiff
path: root/src
diff options
context:
space:
mode:
authorRussell Yanofsky <russ@yanofsky.org>2018-10-31 13:00:54 -0400
committerRussell Yanofsky <russ@yanofsky.org>2018-11-01 12:55:39 -0400
commit535203075e50eedef8f00852328f81f440233278 (patch)
tree3ec4c5e88ab257613142f493333292d3e9f3dda2 /src
parentbafb921507761217a2e9013a42e0aa619f831ccf (diff)
Avoid using numeric_limits for sequence numbers and lock times
Switches to named constants, because numeric_limits calls can be harder to read and less portable. Change was suggested by James O'Beirne <james.obeirne@gmail.com> in https://github.com/bitcoin/bitcoin/pull/10973#discussion_r213473620 There are no changes in behavior except on some platforms we don't support (ILP64, IP16L32, I16LP32), where SignalsOptInRBF() and MutateTxAddInput() functions would now work correctly.
Diffstat (limited to 'src')
-rw-r--r--src/bitcoin-tx.cpp2
-rw-r--r--src/rpc/rawtransaction.cpp10
-rw-r--r--src/script/script.h6
3 files changed, 12 insertions, 6 deletions
diff --git a/src/bitcoin-tx.cpp b/src/bitcoin-tx.cpp
index 6d86581ac6..7a3b936d55 100644
--- a/src/bitcoin-tx.cpp
+++ b/src/bitcoin-tx.cpp
@@ -255,7 +255,7 @@ static void MutateTxAddInput(CMutableTransaction& tx, const std::string& strInpu
throw std::runtime_error("invalid TX input vout '" + strVout + "'");
// extract the optional sequence number
- uint32_t nSequenceIn=std::numeric_limits<unsigned int>::max();
+ uint32_t nSequenceIn = CTxIn::SEQUENCE_FINAL;
if (vStrInputParts.size() > 2)
nSequenceIn = std::stoul(vStrInputParts[2]);
diff --git a/src/rpc/rawtransaction.cpp b/src/rpc/rawtransaction.cpp
index a2d990b51d..bcc4db963c 100644
--- a/src/rpc/rawtransaction.cpp
+++ b/src/rpc/rawtransaction.cpp
@@ -346,7 +346,7 @@ CMutableTransaction ConstructTransaction(const UniValue& inputs_in, const UniVal
if (!locktime.isNull()) {
int64_t nLockTime = locktime.get_int64();
- if (nLockTime < 0 || nLockTime > std::numeric_limits<uint32_t>::max())
+ if (nLockTime < 0 || nLockTime > LOCKTIME_MAX)
throw JSONRPCError(RPC_INVALID_PARAMETER, "Invalid parameter, locktime out of range");
rawTx.nLockTime = nLockTime;
}
@@ -368,18 +368,18 @@ CMutableTransaction ConstructTransaction(const UniValue& inputs_in, const UniVal
uint32_t nSequence;
if (rbfOptIn) {
- nSequence = MAX_BIP125_RBF_SEQUENCE;
+ nSequence = MAX_BIP125_RBF_SEQUENCE; /* CTxIn::SEQUENCE_FINAL - 2 */
} else if (rawTx.nLockTime) {
- nSequence = std::numeric_limits<uint32_t>::max() - 1;
+ nSequence = CTxIn::SEQUENCE_FINAL - 1;
} else {
- nSequence = std::numeric_limits<uint32_t>::max();
+ nSequence = CTxIn::SEQUENCE_FINAL;
}
// set the sequence number if passed in the parameters object
const UniValue& sequenceObj = find_value(o, "sequence");
if (sequenceObj.isNum()) {
int64_t seqNr64 = sequenceObj.get_int64();
- if (seqNr64 < 0 || seqNr64 > std::numeric_limits<uint32_t>::max()) {
+ if (seqNr64 < 0 || seqNr64 > CTxIn::SEQUENCE_FINAL) {
throw JSONRPCError(RPC_INVALID_PARAMETER, "Invalid parameter, sequence number is out of range");
} else {
nSequence = (uint32_t)seqNr64;
diff --git a/src/script/script.h b/src/script/script.h
index 00065a24be..1d8ddba2f2 100644
--- a/src/script/script.h
+++ b/src/script/script.h
@@ -38,6 +38,12 @@ static const int MAX_STACK_SIZE = 1000;
// otherwise as UNIX timestamp.
static const unsigned int LOCKTIME_THRESHOLD = 500000000; // Tue Nov 5 00:53:20 1985 UTC
+// Maximum nLockTime. Since a lock time indicates the last invalid timestamp, a
+// transaction with this lock time will never be valid unless lock time
+// checking is disabled (by setting all input sequence numbers to
+// SEQUENCE_FINAL).
+static const uint32_t LOCKTIME_MAX = 0xFFFFFFFFU;
+
template <typename T>
std::vector<unsigned char> ToByteVector(const T& in)
{