Bitcoin Transaction and Script BIPs Articles

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

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

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

BIP 69 transaction sorting explained: learn input outpoint ordering, output amount and script ordering, privacy limits and functional exceptions.

BIP 68 relative lock time made simple. See what the proposal changes, its current status and what it means for Bitcoin users and operators.

BIP 65 CHECKLOCKTIMEVERIFY made simple. See what the proposal changes, its current status and what it means for Bitcoin users and operators.

OP_RETURN explained for Bitcoin operators: understand unspendable outputs, relay and mining policy, consensus validity and changing data-size defaults.

BIP 62 transaction malleability explained as a closed proposal covering DER signatures, low-S values, minimal pushes and later deployed rules.

BIP 30 duplicate transactions explained: learn why overwriting unspent outputs was unsafe, how nodes enforce uniqueness and what miners must validate.

BIP 18 hashScriptCheck explained: review its dataSig and scriptCheck model, sigop accounting, compatibility plan and relationship to deployed P2SH.

BIP 11 M-of-N transactions explained: understand early bare multisig standardness, CHECKMULTISIG, sigop limits and why P2SH changed deployment.