## Preamble

    EIP: <to be assigned>
    Title: Hardfork Meta: Metropolis
    Author: Alex Beregszaszi
    Type: Standard Track
    Category: Core
    Status: Draft
    Created: 23/04/2017
    Requires: 86, 96, 98, 100, 140, 196, 197, 198, 211, 214

## Abstract

This specifies the changes included in the hard fork named Metropolis.

## Specification

- Codename: Metropolis
- Activation:
  - Block not specified yet
- Included EIPs:
  - EIP 86 (Abstraction of transaction origin and signature)
  - EIP 96 (Blockhash refactoring)
  - EIP 98 (Removal of intermediate state roots from receipts)
  - EIP 100 (Change difficulty adjustment to target mean block time including uncles)
  - EIP 140 (REVERT instruction in the Ethereum Virtual Machine)
  - EIP 196 (Precompiled contracts for addition and scalar multiplication on the elliptic curve alt_bn128)
  - EIP 197 (Precompiled contracts for optimal ate pairing check on the elliptic curve alt_bn128)
  - EIP 198 (Precompiled contract for bigint modular exponentiation)
  - EIP 211 (New opcodes: RETURNDATASIZE and RETURNDATACOPY)
  - EIP 214 (New opcode STATICCALL)

## Copyright

Copyright and related rights waived via [CC0](https://creativecommons.org/publicdomain/zero/1.0/).