TCP traffic to 94.61.162.190 on port 9333Ĭontains ability to reboot/shutdown the operating system FAILED for one retarget period past the timeout time, if LOCKED_IN was not reached.TCP traffic to 165.227.14.252 on port 9333.ACTIVE for all blocks after the LOCKED_IN retarget period.LOCKED_IN for one retarget period after the first retarget period with STARTED blocks of which at least threshold have the associated bit set in nVersion.The genesis block is by definition in this state for each deployment. DEFINED is the first state that each soft fork starts out as.
![bip65 reference miner bip65 reference miner](http://cdn.businessnews.com.au/articles-2020-02/Mining.jpg)
With each block and soft fork, we associate a deployment state. Timeout or activation, but it is discouraged until necessary, and even then recommended to have a pause in between to detect buggy software.
#Bip65 reference miner software
![bip65 reference miner bip65 reference miner](https://i.pinimg.com/originals/32/ce/59/32ce59db756e844f50ca82469a8ce83e.jpg)
The timeout specifies a time at which the deployment is considered failed.The starttime specifies a minimum median time past of a block at which the bit gains its meaning.The bit determines which bit in the nVersion field of the block is to be used to signal the soft fork lock-in and activation.For deployments described in a single BIP, it is recommended to use the name “bipN” where N is the appropriate BIP number. The name specifies a very brief description of the soft fork, reasonable for use as an identifier.SpecificationĮach soft fork deployment is specified by the following per-chain parameters (further elaborated below): As will be shown further, this is unnecessary. This approach was later reused in BIP 66 and BIP 65, which further removed nVersions 2 and 3 as valid options.
#Bip65 reference miner upgrade
This indicates another downside this approach: every upgrade permanently restricts the set of allowed nVersion field values. In addition, BIP 34 made the integer comparison (nVersion >= 2) a consensus rule after its 95% threshold was reached, removing 2 31+2 values from the set of valid version numbers (all negative numbers, as nVersion is interpreted as a signed integer, as well as 0 and 1).
![bip65 reference miner bip65 reference miner](https://www.sonnysoftware.com/referenceminer/files/pubmedadvancedsearch.jpg)
As it relies on comparing version numbers as integers however, it only supports one single change being rolled out at once, requiring coordination between proposals, and does not allow for permanent rejection: as long as one soft fork is not fully rolled out, no future one can be scheduled. MotivationīIP 34 introduced a mechanism for doing soft-forking changes without a predefined flag timestamp (or flag block height), instead relying on measuring miner support indicated by a higher version number in block headers. Once the consensus change succeeds or times out, there is a “fallow” pause after which the bit can be reused for later changes. It relies on interpreting the version field as a bit vector, where each bit can be used to track an independent change. This document specifies a proposed change to the semantics of the ‘version’ field in Bitcoin blocks, allowing multiple backward-compatible changes (further called “soft forks”) to be deployed in parallel. Title: Version bits with timeout and delay