2017-04-23 16:04:44 +00:00
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## Preamble
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2017-08-13 14:28:36 +00:00
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EIP: 609
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Title: Hardfork Meta: Byzantium
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2017-04-23 16:04:44 +00:00
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Author: Alex Beregszaszi
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Type: Standard Track
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Category: Core
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2017-12-10 19:47:24 +00:00
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Status: Final
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2017-08-13 14:28:36 +00:00
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Created: 2017-04-23
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2017-08-26 09:23:57 +00:00
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Requires: 100, 140, 196, 197, 198, 211, 214, 649, 658
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2017-04-23 16:04:44 +00:00
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## Abstract
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2017-08-13 14:28:36 +00:00
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This specifies the changes included in the hard fork named Byzantium.
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2017-04-23 16:04:44 +00:00
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## Specification
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2017-08-13 14:28:36 +00:00
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- Codename: Byzantium
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- Aliases: Metropolis/Byzantium, Metropolis part 1
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2017-04-23 16:04:44 +00:00
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- Activation:
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2017-11-19 01:02:03 +00:00
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- Block >= 4,370,000 on Mainnet
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- Block >= 1,700,000 on Ropsten testnet
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2017-04-23 16:04:44 +00:00
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- Included EIPs:
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2017-12-01 12:15:58 +00:00
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- [EIP 100](./eip-100.md) (Change difficulty adjustment to target mean block time including uncles)
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2017-12-11 20:30:38 +00:00
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- [EIP 140](./eip-140.md) (REVERT instruction in the Ethereum Virtual Machine)
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- [EIP 196](./eip-196.md) (Precompiled contracts for addition and scalar multiplication on the elliptic curve alt_bn128)
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2017-12-04 12:03:41 +00:00
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- [EIP 197](./eip-197.md) (Precompiled contracts for optimal ate pairing check on the elliptic curve alt_bn128)
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2017-04-23 16:04:44 +00:00
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- EIP 198 (Precompiled contract for bigint modular exponentiation)
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2017-12-11 20:30:38 +00:00
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- [EIP 211](./eip-211.md) (New opcodes: RETURNDATASIZE and RETURNDATACOPY)
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- [EIP 214](./eip-214.md) (New opcode STATICCALL)
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2017-12-01 12:15:58 +00:00
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- [EIP 649](./eip-649.md) (Difficulty Bomb Delay and Block Reward Reduction)
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- [EIP 658](./eip-658.md) (Embedding transaction status code in receipts)
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2017-11-19 01:02:03 +00:00
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## References
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1. https://blog.ethereum.org/2017/10/12/byzantium-hf-announcement/
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2017-04-23 16:04:44 +00:00
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## Copyright
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Copyright and related rights waived via [CC0](https://creativecommons.org/publicdomain/zero/1.0/).
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