---
eip: 1679
title: "Hardfork Meta: Istanbul"
author: Alex Beregszaszi (@axic), Afri Schoedon (@5chdn)
discussions-to: https://ethereum-magicians.org/t/hardfork-meta-istanbul-discussion/3207
type: Meta
status: Draft
created: 2019-01-04
requires: 1716
---

## Abstract

This meta-EIP specifies the changes included in the Ethereum hardfork named Istanbul.

## Specification

- Codename: Istanbul
- Activation: TBD

### Included EIPs

- TBD

### Accepted EIPs

- [EIP-152](https://github.com/ethereum/EIPs/pull/2129): Add Blake2 compression function `F` precompile
- [EIP-1108](https://eips.ethereum.org/EIPS/eip-1108): Reduce alt_bn128 precompile gas costs
- [EIP-1344](https://eips.ethereum.org/EIPS/eip-1344): Add ChainID opcode
- [EIP-2028](https://eips.ethereum.org/EIPS/eip-2028): Calldata gas cost reduction

### Tentatively Accepted EIPs

- [EIP-1057](https://eips.ethereum.org/EIPS/eip-1057): ProgPoW, a Programmatic
  Proof-of-Work
  - There is a
    [pending audit](https://medium.com/ethereum-cat-herders/progpow-audit-goals-expectations-75bb902a1f01),
    above and beyond standard security considerations, that should be evaluated
    prior to inclusion.
- [EIP-1702](https://eips.ethereum.org/EIPS/eip-1702): Generalized account versioning scheme
- [EIP-1884](https://eips.ethereum.org/EIPS/eip-1884): Repricing for trie-size-dependent opcodes
- [EIP-1962](https://eips.ethereum.org/EIPS/eip-1962): EC arithmetic and pairings with runtime definitions
  - replaces EIP-1829
- [EIP-2200](https://github.com/ethereum/EIPs/pull/2200): Rebalance net-metered SSTORE gas cost with consideration of SLOAD gas cost change

### Rejected/Withdrawn EIPs

- [EIP-615](https://eips.ethereum.org/EIPS/eip-615): Subroutines and Static Jumps for the EVM - *Withdrawn*
- [EIP-1109](https://eips.ethereum.org/EIPS/eip-1109): PRECOMPILEDCALL opcode (Remove CALL costs for precompiled contracts)
  - requirement of EIP-1962
- [EIP-1283](https://eips.ethereum.org/EIPS/eip-1283): Net gas metering for SSTORE without dirty maps
  - replaced by EIP-2200
- [EIP-1559](https://eips.ethereum.org/EIPS/eip-1559): Fee market change for ETH 1.0 chain
- [EIP-1706](https://eips.ethereum.org/EIPS/eip-1706): Disable SSTORE with gasleft lower than call stipend
  - replaced by EIP-2200
- [EIP-1959](https://eips.ethereum.org/EIPS/eip-1959): New Opcode to check if a chainID is part of the history of chainIDs
- [EIP-1829](http://eips.ethereum.org/EIPS/eip-1829): Precompile for Elliptic Curve Linear Combinations
  - replaced by EIP-1962
- [EIP-1930](https://eips.ethereum.org/EIPS/eip-1930): CALLs with strict gas semantic. Revert if not enough gas available.
- [EIP-1965](https://eips.ethereum.org/EIPS/eip-1965): Method to check if a chainID is valid at a specific block Number
- [EIP-2014](https://eips.ethereum.org/EIPS/eip-2014): Extended State Oracle - *Withdrawn*
- [EIP-2025](https://eips.ethereum.org/EIPS/eip-2025): Funding Eth1.x with Developer Block Rewards - *Withdrawn*
- [EIP-2026](https://eips.ethereum.org/EIPS/eip-2026): State Rent H - Fixed Prepayment for accounts
- [EIP-2027](https://eips.ethereum.org/EIPS/eip-2027): State Rent C - Net contract size accounting
- [EIP-2029](https://eips.ethereum.org/EIPS/eip-2029): State Rent A - State counters contract
  - requirement of EIP-2031
- [EIP-2031](https://eips.ethereum.org/EIPS/eip-2031): State Rent B - Net transaction counter
- [EIP-2035](https://eips.ethereum.org/EIPS/eip-2035): Stateless Clients - Repricing SLOAD and SSTORE to pay for block proofs

### Proposed EIPs

- [EIP-663](https://eips.ethereum.org/EIPS/eip-663): Unlimited SWAP and DUP instructions
- [EIP-1352](https://eips.ethereum.org/EIPS/eip-1352): Specify restricted address range for precompiles/system contracts
- [EIP-1380](https://eips.ethereum.org/EIPS/eip-1380): Reduced gas cost for call to self
- [EIP-1803](https://eips.ethereum.org/EIPS/eip-1803): Rename opcodes for clarity
- [EIP-1985](https://eips.ethereum.org/EIPS/eip-1985): Sane limits for certain EVM parameters
- [EIP-2045](https://eips.ethereum.org/EIPS/eip-2045): Particle gas costs for EVM opcodes
- [EIP-2046](https://eips.ethereum.org/EIPS/eip-2046): Reduced gas cost for static calls made to precompiles

## Timeline

* 2019-05-17 (Fri) hard deadline to accept proposals for "Istanbul"
* 2019-07-19 (Fri) soft deadline for major client implementations
* 2019-09-04 (Wed) projected date for testnet network upgrade (Ropsten, Görli, or ad-hoc testnet)
* 2019-10-16 (Wed) projected date for mainnet upgrade ("Istanbul")

## References

- [Core Dev call notes](https://github.com/ethereum/pm/issues/66#issuecomment-450840440) where timeline was proposed and accepted

## Copyright

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