Bitcoin Improvement Proposals Articles

BIP 124 HD script templates explained: review deterministic key groups, lexicographic sorting, placeholders and why the incomplete proposal closed.

BIP 83 dynamic HD key trees explained: understand reserved child zero, nested path notation, application mappings and safe wallet recovery.

BIP 140 normalized TXIDs explained: learn how the closed proposal removed signature scripts, introduced OP_CHECKSIGEX and tracked two identities.

BIP9 miner signalling explained through DEFINED, STARTED, LOCKED_IN, ACTIVE and FAILED states, including retarget windows and pool checks.

BIP 107 dynamic block size explained as a closed hard-fork proposal with a staged runway, 4,032-block checks and 10% increases.

BIP 132 committee acceptance explained as a closed governance proposal using four stakeholder segments, timed reviews and a 70% threshold.

BIP 122 blockchain URI explained: learn its chain IDs, transaction, block and address paths, parser boundaries and safe explorer handling.

BIP 123 classification explained: distinguish consensus, peer services, API/RPC and application layers and apply the right interoperability evidence.

BIP 106 dynamic block size explained: compare its utilisation-only and fee-aware algorithms, 2,016-block periods and hard-fork risks.

BIP 105 block size retargeting explained as a closed hard-fork proposal using coinbase votes, proof-of-work penalties and 2,016-block medians.

BIP 111 NODE_BLOOM explained: understand service-bit discovery, protocol version 70011, legacy SPV compatibility, privacy and node DoS controls.

BIP 113 median time past explained: learn how the previous 11 blocks govern time-based nLockTime, mempool policy and CSV deployment.