Bitcoin Improvement Proposals Articles

BIP 133 fee filters explained: learn how Bitcoin peers announce feerate thresholds, reduce wasted transaction relay and preserve filter privacy.

BIP 126 mixed-input privacy explained: review standard and alternate transaction forms, equal outputs, UTXO controls and the Draft status.

BIP 2 process explained: learn its champion, editor, status, licensing and interoperability requirements and why BIP 3 now replaces it.

BIP 74 explained as a closed BIP 70 extension for zero-value OP_RETURN outputs, including payable-output rules, metadata risk and wallet checks.

BIP 109 explained as a closed hard fork proposing two-megabyte blocks, accurate sigop counting, sighash limits and a 75% miner trigger.

BIP 144 SegWit relay made simple. See what the proposal changes, its current status and what it means for Bitcoin users and operators.

BIP 143 signature hashing explained: learn the SegWit digest fields, input amount commitment, performance gains and validation requirements.

BIP 142 SegWit addresses explained: review the closed Base58 design for native P2WPKH and P2WSH and why Bech32 became the deployed format.

BIP 141 transaction weight explained for miners: calculate base size, total size, virtual bytes, witness discount and four-million-unit block limits.

BIP 125 replace by fee made simple. See what the proposal changes, its current status and what it means for Bitcoin users and operators.

BIP 131 coalescing transactions explained as a closed hard-fork proposal using wildcard inputs to aggregate same-script UTXOs and their risks.

BIP 75 encrypted address exchange explained: understand sender authentication, ECDH privacy, store-and-forward servers and legacy BIP 70 risk.