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nimbus-eth1/nimbus/evm/interpreter/forks_list.md

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provide identical copy of vm folder => vm2, activated by make flag ENABLE_VM2=1 why: vm2 enabled by ENABLE_VM2=1 behaves as vm without ENABLE_EVMC=1 until it doesn't in some future fatch set. this leaves some wiggle room to work on a vm copy without degrading the original implementation. details: + additional make flag ENABLE_VM2=1 (or ENABLE_VM2=0 to explicitely disable) + when both flags ENABLE_EVMC=1 and ENABLE_VM2=1 are present, the former flag ENABLE_EVMC=1 takes precedence, this is implemented at the NIM compiler level for -d:evmc_enabled and -d:vm2_enabled
2021-04-08 14:52:10 +00:00
# List of Ethereum hard forks with VM impact.
From https://www.etherchain.org/hardForks
| Name | On Roadmap | Date | Block |
| --------------------------- | ------------ | ------------------- | ------- |
| Frontier | Yes | 30/07/2015 19:26:28 | 1 |
| Frontier Thawing | Yes | 08/09/2015 01:33:09 | 200000 |
| Homestead | Yes | 14/03/2016 20:49:53 | 1150000 |
| DAO Fork | No | 20/07/2016 17:20:40 | 1920000 |
| Tangerine Whistle (EIP-150) | No | 18/10/2016 17:19:31 | 2463000 |
| Spurious Dragon | No | 22/11/2016 18:15:44 | 2675000 |
| Byzantium | Yes | 16/10/2017 09:22:11 | 4370000 |
From https://ethereum.stackexchange.com/a/28409
![](forks_list.png)
Tangerine Whistles introduced new gas costs
Byzantium introduced opcodes:
- REVERT (EIP 140)
- RETURNDATASIZE and RETURNDATACOPY (EIP 211)
- STATICCALL (EIP 214)