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Export constant for the maximum time offset.

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This commit creates and exports a new constant, MaxTimeOffsetSeconds,
which is the maximum number of seconds a block timestamp is allowed to be
ahead of the current time.

Previously this value was hard coded into the consensus rule path, however
it is useful better to have it defined as a constant and exported so other
callers can access it.

No consensus rules have been changed with this commit.
This commit is contained in:
Dave Collins 2014-06-30 10:27:44 -05:00
parent dbca1d59c3
commit 933cdf50e8
1 changed files with 8 additions and 2 deletions
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10
validate.go
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@ -29,6 +29,11 @@ const (
// the lock time is a uint32, the max is sometime around 2106.
lockTimeThreshold uint32 = 5e8 // Tue Nov 5 00:53:20 1985 UTC
// MaxTimeOffsetSeconds is the maximum number of seconds a block time
// is allowed to be ahead of the current time. This is currently 2
// hours.
MaxTimeOffsetSeconds = 2 * 60 * 60
// MinCoinbaseScriptLen is the minimum length a coinbase script can be.
MinCoinbaseScriptLen = 2
@ -462,8 +467,9 @@ func checkBlockSanity(block *btcutil.Block, powLimit *big.Int, flags BehaviorFla
return ruleError(ErrInvalidTime, str)
}
// Ensure the block time is not more than 2 hours in the future.
if header.Timestamp.After(time.Now().Add(time.Hour * 2)) {
// Ensure the block time is not too far in the future.
maxTimestamp := time.Now().Add(time.Second * MaxTimeOffsetSeconds)
if header.Timestamp.After(maxTimestamp) {
str := fmt.Sprintf("block timestamp of %v is too far in the "+
"future", header.Timestamp)
return ruleError(ErrTimeTooNew, str)