EIPs/README.md

# EIPs [![Gitter](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/ethereum/EIPs?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge)
Ethereum Improvement Proposals (EIPs) describe standards for the Ethereum platform, including core protocol specifications, client APIs, and contract standards.

# Contributing
First review [EIP-1](EIPS/eip-1.md). Then clone the repository and add your EIP to it. There is a [template EIP here](eip-X.md). Then submit a Pull Request to Ethereum's [EIPs repository](https://github.com/ethereum/EIPs).

# 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.

# Deferred EIPs (adoption postponed until the Constantinople Metropolis hard fork)
| Number                                                  |Title                                                                                | Author                | Layer       | Status    |
| ------------------------------------------------------- | ----------------------------------------------------------------------------------- | --------------------  | ------------| ----------|
| [86](https://github.com/ethereum/EIPs/pull/208)         | Abstraction of transaction origin and signature                                     | Vitalik Buterin       | Core        | Deferred  |
| [96](https://github.com/ethereum/EIPs/pull/210)         | Blockhash refactoring                                                               | Vitalik Buterin       | Core        | Deferred  |
| [145](EIPS/eip-145.md)                                  | Bitwise shifting instructions in EVM                        | Alex Beregszaszi, Paweł Bylica | Core        | Deferred   |

# Finalized EIPs (standards that have been adopted)
| Number                                                  |Title                                                        | Author          | Layer       | Status  |
| ------------------------------------------------------- | ----------------------------------------------------------- | ----------------| ------------| --------|
| [2](EIPS/eip-2.md)                                      | Homestead Hard-fork Changes                                 | Vitalik Buterin | Core        | Final   |
| [6](EIPS/eip-6.md)                                      | Renaming Suicide Opcode                                     | Hudson Jameson  | Interface   | Final   |
| [7](EIPS/eip-7.md)                                      | DELEGATECALL                                                | Vitalik Buterin | Core        | Final   |
| [8](EIPS/eip-8.md)                                      | devp2p Forward Compatibility Requirements for Homestead     | Felix Lange     | Networking  | Final   |
| [20](EIPS/eip-20-token-standard.md)                     | ERC-20 Token Standard                                       | Fabian Vogelsteller, Vitalik Buterin     | ERC  | Final   |
| [55](EIPS/eip-55.md)                                    | ERC-55 Mixed-case checksum address encoding                 | Vitalik Buterin | Core        | Final   |
| [100](https://github.com/ethereum/EIPs/issues/100)      | Change difficulty adjustment to target mean block time including uncles             | Vitalik Buterin       | Core        | Final  |
| [137](EIPS/eip-137.md)                                  | Ethereum Domain Name Service - Specification                | Nick Johnson | ERC        | Final   |
| [140](https://github.com/ethereum/EIPs/pull/206)        | REVERT instruction in the Ethereum Virtual Machine                                  | Beregszaszi, Mushegian| Core        | Final  |
| [141](EIPS/eip-141.md)                                  | Designated invalid EVM instruction                          | Alex Beregszaszi| Core        | Final   |
| [150](EIPS/eip-150.md)                                  | Gas cost changes for IO-heavy operations                    | Vitalik Buterin | Core        | Final   |
| [155](EIPS/eip-155.md)                                  | Simple replay attack protection                             | Vitalik Buterin | Core        | Final   |
| [160](EIPS/eip-160.md)                                  | EXP cost increase                                           | Vitalik Buterin | Core        | Final   |
| [161](EIPS/eip-161.md)                                  | State trie clearing (invariant-preserving alternative)      | Gavin Wood | Core        | Final   |
| [162](EIPS/eip-162.md)                                  | ERC-162 ENS support for reverse resolution of Ethereum addresses | Maurelian, Nick Johnson | ERC        | Final   |
| [170](EIPS/eip-170.md)                                  | Contract code size limit                                    | Vitalik Buterin | Core        | Final   |
| [181](EIPS/eip-181.md)                                  | ERC-181 ENS support for reverse resolution of Ethereum addresses | Nick Johnson | ERC        | Final   |
| [190](EIPS/eip-190.md)                                  | ERC-190 Ethereum Smart Contract Packaging Standard          | Piper Merriam, Tim Coulter, Denis Erfurt (mhhf), RJ Catalano (VoR0220), Iuri Matias (iurimatias) | ERC        | Final   |
| [196](https://github.com/ethereum/EIPs/pull/213)        | Precompiled contracts for addition and scalar multiplication on the elliptic curve alt_bn128 | Reitwiessner | Core        | Final  |
| [197](https://github.com/ethereum/EIPs/pull/212)        | Precompiled contracts for optimal Ate pairing check on the elliptic curve alt_bn128 | Buterin, Reitwiessner | Core        | Final  |
| [198](https://github.com/ethereum/EIPs/pull/198)        | Precompiled contract for bigint modular exponentiation                              | Vitalik Buterin       | Core        | Final  |
| [211](https://github.com/ethereum/EIPs/pull/211)        | New opcodes: RETURNDATASIZE and RETURNDATACOPY                                      | Christian Reitwiessner| Core        | Final  |
| [214](https://github.com/ethereum/EIPs/pull/214)        | New opcode STATICCALL                                                               | Buterin, Reitwiessner | Core        | Final  |
| [606](EIPS/eip-606.md)                                  | Hardfork Meta: Homestead                                    | Alex Beregszaszi | Meta         | Final    |
| [607](EIPS/eip-607.md)                                  | Hardfork Meta: Spurious Dragon                              | Alex Beregszaszi | Meta         | Final    |
| [608](EIPS/eip-608.md)                                  | Hardfork Meta: Tangerine Whistle                            | Alex Beregszaszi | Meta         | Final    |
| [609](EIPS/eip-609.md)                                  | Hardfork Meta: Byzantium                                    | Alex Beregszaszi | Meta         | Final  |
| [649](https://github.com/ethereum/EIPs/pull/669)        | Metropolis Difficulty Bomb Delay and Block Reward Reduction                         | Schoedon, Buterin     | Core        | Final  |
| [658](https://github.com/ethereum/EIPs/pull/658)        | Embedding transaction return data in receipts                                       | Nick Johnson          | Core        | Final  |
| [706](EIPS/eip-706.md)                                  | DEVp2p snappy compression                                   | Péter Szilágyi     | Networking  | Final   |
redo table of EIPs in README 2017-03-03 17:14:28 +00:00			`# EIPs [![Gitter](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/ethereum/EIPs?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge)`
			`Ethereum Improvement Proposals (EIPs) describe standards for the Ethereum platform, including core protocol specifications, client APIs, and contract standards.`
Update README.md 2015-10-27 05:57:12 +00:00
Fixing few typos 2015-11-17 14:07:56 +00:00			`# Contributing`
Update README.md 2017-02-02 01:15:11 +00:00			`First review [EIP-1](EIPS/eip-1.md). Then clone the repository and add your EIP to it. There is a [template EIP here](eip-X.md). Then submit a Pull Request to Ethereum's [EIPs repository](https://github.com/ethereum/EIPs).`
Update README.md 2015-10-27 04:39:53 +00:00
redo table of EIPs in README 2017-03-03 17:14:28 +00:00			`# 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.`

Add split metropolis HF names Maybe there's a better way to express this, but it seems there could be more clarity about the distinction between 'planned' and 'deferred'. 2017-09-08 13:37:54 +00:00			`# Deferred EIPs (adoption postponed until the Constantinople Metropolis hard fork)`
move EIP 86 to deferred table 2017-07-17 15:21:12 +00:00			`\| Number \|Title \| Author \| Layer \| Status \|`
			`\| ------------------------------------------------------- \| ----------------------------------------------------------------------------------- \| -------------------- \| ------------\| ----------\|`
			`\| [86](https://github.com/ethereum/EIPs/pull/208) \| Abstraction of transaction origin and signature \| Vitalik Buterin \| Core \| Deferred \|`
Defer EIP96 from Byzantium to Constantinople (#685) 2017-08-14 13:19:12 +00:00			`\| [96](https://github.com/ethereum/EIPs/pull/210) \| Blockhash refactoring \| Vitalik Buterin \| Core \| Deferred \|`
Move 145 to deferred. Deleted duplicate 170 and byz draft. 2017-10-11 16:35:53 +00:00			`\| [145](EIPS/eip-145.md) \| Bitwise shifting instructions in EVM \| Alex Beregszaszi, Paweł Bylica \| Core \| Deferred \|`
redo table of EIPs in README 2017-03-03 17:14:28 +00:00
			`# Finalized EIPs (standards that have been adopted)`
add EIP-186 to consideration table, remove Type column 2017-05-03 13:48:10 +00:00			`\| Number \|Title \| Author \| Layer \| Status \|`
			`\| ------------------------------------------------------- \| ----------------------------------------------------------- \| ----------------\| ------------\| --------\|`
update links to ref files, not issues 2017-08-15 13:36:45 +00:00			`\| [2](EIPS/eip-2.md) \| Homestead Hard-fork Changes \| Vitalik Buterin \| Core \| Final \|`
add EIP-186 to consideration table, remove Type column 2017-05-03 13:48:10 +00:00			`\| [6](EIPS/eip-6.md) \| Renaming Suicide Opcode \| Hudson Jameson \| Interface \| Final \|`
			`\| [7](EIPS/eip-7.md) \| DELEGATECALL \| Vitalik Buterin \| Core \| Final \|`
			`\| [8](EIPS/eip-8.md) \| devp2p Forward Compatibility Requirements for Homestead \| Felix Lange \| Networking \| Final \|`
Add ERC-20 2017-09-11 13:39:33 +00:00			`\| [20](EIPS/eip-20-token-standard.md) \| ERC-20 Token Standard \| Fabian Vogelsteller, Vitalik Buterin \| ERC \| Final \|`
Added a lot of missing EIPs to the list of finalized EIPs 2017-10-05 17:38:35 +00:00			`\| [55](EIPS/eip-55.md) \| ERC-55 Mixed-case checksum address encoding \| Vitalik Buterin \| Core \| Final \|`
Byzantium is now live 2017-10-17 14:39:52 +00:00			`\| [100](https://github.com/ethereum/EIPs/issues/100) \| Change difficulty adjustment to target mean block time including uncles \| Vitalik Buterin \| Core \| Final \|`
Added a lot of missing EIPs to the list of finalized EIPs 2017-10-05 17:38:35 +00:00			`\| [137](EIPS/eip-137.md) \| Ethereum Domain Name Service - Specification \| Nick Johnson \| ERC \| Final \|`
Byzantium is now live 2017-10-17 14:39:52 +00:00			`\| [140](https://github.com/ethereum/EIPs/pull/206) \| REVERT instruction in the Ethereum Virtual Machine \| Beregszaszi, Mushegian\| Core \| Final \|`
Corrected typo in "Beregszaszi" 2017-08-15 13:50:56 +00:00			`\| [141](EIPS/eip-141.md) \| Designated invalid EVM instruction \| Alex Beregszaszi\| Core \| Final \|`
update links to ref files, not issues 2017-08-15 13:36:45 +00:00			`\| [150](EIPS/eip-150.md) \| Gas cost changes for IO-heavy operations \| Vitalik Buterin \| Core \| Final \|`
			`\| [155](EIPS/eip-155.md) \| Simple replay attack protection \| Vitalik Buterin \| Core \| Final \|`
			`\| [160](EIPS/eip-160.md) \| EXP cost increase \| Vitalik Buterin \| Core \| Final \|`
Added a lot of missing EIPs to the list of finalized EIPs 2017-10-05 17:38:35 +00:00			`\| [161](EIPS/eip-161.md) \| State trie clearing (invariant-preserving alternative) \| Gavin Wood \| Core \| Final \|`
			`\| [162](EIPS/eip-162.md) \| ERC-162 ENS support for reverse resolution of Ethereum addresses \| Maurelian, Nick Johnson \| ERC \| Final \|`
update links to ref files, not issues 2017-08-15 13:36:45 +00:00			`\| [170](EIPS/eip-170.md) \| Contract code size limit \| Vitalik Buterin \| Core \| Final \|`
Added a lot of missing EIPs to the list of finalized EIPs 2017-10-05 17:38:35 +00:00			`\| [181](EIPS/eip-181.md) \| ERC-181 ENS support for reverse resolution of Ethereum addresses \| Nick Johnson \| ERC \| Final \|`
			`\| [190](EIPS/eip-190.md) \| ERC-190 Ethereum Smart Contract Packaging Standard \| Piper Merriam, Tim Coulter, Denis Erfurt (mhhf), RJ Catalano (VoR0220), Iuri Matias (iurimatias) \| ERC \| Final \|`
Byzantium is now live 2017-10-17 14:39:52 +00:00			`\| [196](https://github.com/ethereum/EIPs/pull/213) \| Precompiled contracts for addition and scalar multiplication on the elliptic curve alt_bn128 \| Reitwiessner \| Core \| Final \|`
			`\| [197](https://github.com/ethereum/EIPs/pull/212) \| Precompiled contracts for optimal Ate pairing check on the elliptic curve alt_bn128 \| Buterin, Reitwiessner \| Core \| Final \|`
			`\| [198](https://github.com/ethereum/EIPs/pull/198) \| Precompiled contract for bigint modular exponentiation \| Vitalik Buterin \| Core \| Final \|`
			`\| [211](https://github.com/ethereum/EIPs/pull/211) \| New opcodes: RETURNDATASIZE and RETURNDATACOPY \| Christian Reitwiessner\| Core \| Final \|`
			`\| [214](https://github.com/ethereum/EIPs/pull/214) \| New opcode STATICCALL \| Buterin, Reitwiessner \| Core \| Final \|`
Added a lot of missing EIPs to the list of finalized EIPs 2017-10-05 17:38:35 +00:00			`\| [606](EIPS/eip-606.md) \| Hardfork Meta: Homestead \| Alex Beregszaszi \| Meta \| Final \|`
			`\| [607](EIPS/eip-607.md) \| Hardfork Meta: Spurious Dragon \| Alex Beregszaszi \| Meta \| Final \|`
			`\| [608](EIPS/eip-608.md) \| Hardfork Meta: Tangerine Whistle \| Alex Beregszaszi \| Meta \| Final \|`
add Byzantium meta-EIP to Finalized table 2017-11-17 17:44:59 +00:00			`\| [609](EIPS/eip-609.md) \| Hardfork Meta: Byzantium \| Alex Beregszaszi \| Meta \| Final \|`
Merge README.md 2017-11-18 10:10:29 +00:00			`\| [649](https://github.com/ethereum/EIPs/pull/669) \| Metropolis Difficulty Bomb Delay and Block Reward Reduction \| Schoedon, Buterin \| Core \| Final \|`
Byzantium is now live 2017-10-17 14:39:52 +00:00			`\| [658](https://github.com/ethereum/EIPs/pull/658) \| Embedding transaction return data in receipts \| Nick Johnson \| Core \| Final \|`
Added a lot of missing EIPs to the list of finalized EIPs 2017-10-05 17:38:35 +00:00			`\| [706](EIPS/eip-706.md) \| DEVp2p snappy compression \| Péter Szilágyi \| Networking \| Final \|`