Contracts

Smart contracts. 4 proposals.

BIP 71: Payment Protocol MIME types: Deployed. Defines official internet media types (MIME types) for payment protocol messages. These labels let browsers and email programs recognize a Bitcoin payment request and pass it to the right wallet.
BIP 199: Hashed Time-Locked Contract transactions: Closed. Defines the hashed time-locked contract (HTLC), a script where funds can be claimed by revealing a secret before a deadline or reclaimed by the sender afterward. HTLCs are a core building block for…
BIP 300: Hashrate Escrows (Consensus layer): Draft. Proposes "hashrate escrows," which would let bitcoin move to and from sidechains with withdrawals approved gradually by miners over months rather than by a trusted federation. The goal is to allow…
BIP 310: Stratum protocol extensions: Draft. Defines a general way to add extensions to Stratum, the protocol mining pools use to send work to miners. Its main extension allows "version rolling," letting mining hardware vary certain…