EIPs

Ethereum Improvement Proposals (EIPs) describe standards for the Ethereum platform, including core protocol specifications, client APIs, and contract standards.

Contributing

First review EIP-1. Then clone the repository and add your EIP to it. There is a template EIP here. Then submit a Pull Request to Ethereum's EIPs repository.

EIP status terms

• Draft - an EIP that is open for consideration
• Accepted - an EIP that is planned for immediate adoption, i.e. expected to be included in the next hard fork (for Core/Consensus layer EIPs).
• Final - an EIP that has been adopted in a previous hard fork (for Core/Consensus layer EIPs).
• Deferred - an EIP that is not being considered for immediate adoption. May be reconsidered in the future for a subsequent hard fork.

Accepted EIPs (planned for adoption in the Byzantium Metropolis hard fork)

Number	Title	Author	Layer	Status
100	Change difficulty adjustment to target mean block time including uncles	Vitalik Buterin	Core	Accepted
140	REVERT instruction in the Ethereum Virtual Machine	Beregszaszi, Mushegian	Core	Accepted
196	Precompiled contracts for addition and scalar multiplication on the elliptic curve alt_bn128	Reitwiessner	Core	Accepted
197	Precompiled contracts for optimal Ate pairing check on the elliptic curve alt_bn128	Buterin, Reitwiessner	Core	Accepted
198	Precompiled contract for bigint modular exponentiation	Vitalik Buterin	Core	Accepted
211	New opcodes: RETURNDATASIZE and RETURNDATACOPY	Christian Reitwiessner	Core	Accepted
214	New opcode STATICCALL	Buterin, Reitwiessner	Core	Accepted
649	Metropolis Difficulty Bomb Delay and Issuance Reduction	Schoedon, Buterin	Core	Accepted
658	Embedding transaction return data in receipts	Nick Johnson	Core	Accepted

Deferred EIPs (adoption postponed until the Constantinople Metropolis hard fork)

Number	Title	Author	Layer	Status
86	Abstraction of transaction origin and signature	Vitalik Buterin	Core	Deferred
96	Blockhash refactoring	Vitalik Buterin	Core	Deferred
145	Bitwise shifting instructions in EVM	Alex Beregszaszi, Paweł Bylica	Core	Deferred

Finalized EIPs (standards that have been adopted)

Number	Title	Author	Layer	Status
2	Homestead Hard-fork Changes	Vitalik Buterin	Core	Final
6	Renaming Suicide Opcode	Hudson Jameson	Interface	Final
7	DELEGATECALL	Vitalik Buterin	Core	Final
8	devp2p Forward Compatibility Requirements for Homestead	Felix Lange	Networking	Final
20	ERC-20 Token Standard	Fabian Vogelsteller, Vitalik Buterin	ERC	Final
55	ERC-55 Mixed-case checksum address encoding	Vitalik Buterin	Core	Final
137	Ethereum Domain Name Service - Specification	Nick Johnson	ERC	Final
141	Designated invalid EVM instruction	Alex Beregszaszi	Core	Final
150	Gas cost changes for IO-heavy operations	Vitalik Buterin	Core	Final
155	Simple replay attack protection	Vitalik Buterin	Core	Final
160	EXP cost increase	Vitalik Buterin	Core	Final
161	State trie clearing (invariant-preserving alternative)	Gavin Wood	Core	Final
162	ERC-162 ENS support for reverse resolution of Ethereum addresses	Maurelian, Nick Johnson	ERC	Final
170	Contract code size limit	Vitalik Buterin	Core	Final
181	ERC-181 ENS support for reverse resolution of Ethereum addresses	Nick Johnson	ERC	Final
190	ERC-190 Ethereum Smart Contract Packaging Standard	Piper Merriam, Tim Coulter, Denis Erfurt (mhhf), RJ Catalano (VoR0220), Iuri Matias (iurimatias)	ERC	Final
606	Hardfork Meta: Homestead	Alex Beregszaszi	Meta	Final
607	Hardfork Meta: Spurious Dragon	Alex Beregszaszi	Meta	Final
608	Hardfork Meta: Tangerine Whistle	Alex Beregszaszi	Meta	Final
706	DEVp2p snappy compression	Péter Szilágyi	Networking	Final