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.

Non-final EIPs

Number	Title	Author	Layer	Status
3	Addition of CALLDEPTH opcode	Martin Holst Swende	Core	Draft
4	EIP Classification	Joseph Chow	Meta	Draft
5	Gas Usage for RETURN and CALL*	Christian Reitwiessner	Core	Draft
101	Serenity Currency and Crypto Abstraction	Vitalik Buterin		Active
158	State clearing	Vitalik Buterin	Core	Superseded
165	ERC-165 Standard Interface Detection	Christian Reitwiessner	Interface	Draft
234	Add blockHash to JSON-RPC filter options	Micah Zoltu	Interface	Draft
615	Subroutines and Static Jumps for the EVM	Greg Colvin	Core	Draft
616	SIMD Operations for the EVM	Greg Colvin	Core	Draft
681	ERC-681 URL Format for Transaction Requests	Daniel A. Nagy	Interface	Draft
758	Subscriptions and filters for transaction return data	Jack Peterson	Interface	Draft
801	ERC-801 Canary Standard	ligi	Interface	Draft

Deferred EIPs

Number	Title	Author	Layer	Status
86	Abstraction of transaction origin and signature	Vitalik Buterin	Core	Deferred (to be replaced)
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	ERC	Final
100	Change difficulty adjustment to target mean block time including uncles	Vitalik Buterin	Core	Final
137	Ethereum Domain Name Service - Specification	Nick Johnson	ERC	Final
140	REVERT instruction	Alex Beregszaszi, Nikolai Mushegian	Core	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 Initial ENS Hash Registrar	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	Merriam, Coulter, Erfurt, Catalano, Matias	ERC	Final
196	Precompiled contracts for addition and scalar multiplication on the elliptic curve alt_bn128	Christian Reitwiessner	Core	Final
197	Precompiled contracts for optimal Ate pairing check on the elliptic curve alt_bn128	Vitalik Buterin, Christian Reitwiessner	Core	Final
198	Precompiled contract for bigint modular exponentiation	Vitalik Buterin	Core	Final
211	New opcodes: RETURNDATASIZE and RETURNDATACOPY	Christian Reitwiessner	Core	Final
214	New opcode STATICCALL	Vitalik Buterin, Christian Reitwiessner	Core	Final
649	Metropolis Difficulty Bomb Delay and Block Reward Reduction	Afri Schoedon, Vitalik Buterin	Core	Final
658	Embedding transaction status code in receipts	Nick Johnson	Core	Final
706	DEVp2p snappy compression	Péter Szilágyi	Networking	Final

Active EIPs (standards that have been adopted but never meant to be completed)

Number	Title	Author	Layer	Status
1	EIP Purpose and Guidelines	Martin Becze, Hudson Jameson	Meta	Active

Past Hard Forks

Codename	Aliases	Block number	Date (UTC)
Homestead		1,150,000	2016-03-14
DAO Fork		1,920,000	2016-07-20
Tangerine Whistle	Anti-DoS, EIP 150	2,463,000	2016-10-18
Spurious Dragon	State-clearing, EIP 158/161	2,675,000	2016-11-22
Byzantium	Metropolis: Part 1	4,730,000	2017-10-16