EIPs/EIPS/eip-1679.md

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---
eip: 1679
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title: "Hardfork Meta: Istanbul"
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author: Alex Beregszaszi (@axic), Afri Schoedon (@5chdn)
discussions-to: https://ethereum-magicians.org/t/hardfork-meta-istanbul-discussion/3207
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type: Meta
status: Draft
created: 2019-01-04
requires: 1716
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---
## Abstract
This meta-EIP specifies the changes included in the Ethereum hardfork named Istanbul.
## Specification
- Codename: Istanbul
- Activation: TBD
### Included EIPs
- TBD
### Accepted EIPs
- TBD
### Proposed EIPs
- [EIP-1344](https://eips.ethereum.org/EIPS/eip-1344): Add ChainID opcode
- [EIP-1352](https://eips.ethereum.org/EIPS/eip-1352): Specify restricted address range for precompiles/system contracts
- [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
## Timeline
* 2019-05-17 (Fri) hard deadline to accept proposals for "Istanbul"
* 2019-07-19 (Fri) soft deadline for major client implementations
* 2019-08-14 (Wed) projected date for testnet network upgrade (Ropsten, Görli, or ad-hoc testnet)
* 2019-10-16 (Wed) projected date for mainnet upgrade ("Istanbul")
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## References
- [Core Dev call notes](https://github.com/ethereum/pm/issues/66#issuecomment-450840440) where timeline was proposed and accepted
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## Copyright
Copyright and related rights waived via [CC0](https://creativecommons.org/publicdomain/zero/1.0/).