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Add note about free bits and correct deployment recommendations

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BtcDrak 2015-11-20 17:12:43 +00:00
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@ -189,7 +189,7 @@ This BIP was edited by BtcDrak, Nicolas Dorier and kinoshitajona.
This BIP is to be deployed by either version-bits BIP9 or by isSuperMajority(). Exact details TDB.
It is recommended to deploy BIP68 and BIP112 at the same time as this BIP.
It is recommended to deploy BIP112 and BIP113 at the same time as this BIP.
==Compatibility==
@ -197,6 +197,8 @@ The only use of sequence numbers by the Bitcoin Core reference client software i
As can be seen from the specification section, a number of bits are undefined by this BIP to allow for other use cases by setting bit (1 << 31) as the remaining 31 bits have no meaning under this BIP. Additionally, bits (1 << 23) through (1 << 30) inclusive have no meaning at all when bit (1 << 31) is unset.
Additionally, this BIP specifies only 16 bits to actually encode relative lock-time meaning a further 6 are unused (1 << 16 through 1 << 21 inclusive). This allows the possibility to increase granularity by soft-fork, or for increasing the maximum possible relative lock-time in the future.
The most efficient way to calculate sequence number from relative lock-time is with bit masks and shifts:
<pre>