# Nimbus
# Copyright (c) 2022 Status Research & Development GmbH
# Licensed under either of
#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE))
#  * MIT license ([LICENSE-MIT](LICENSE-MIT))
# at your option.
# This file may not be copied, modified, or distributed except according to
# those terms.

import
  ./hardforks

#[
   * - [EIP-1153](https://eips.ethereum.org/EIPS/eip-1153) - Transient Storage Opcodes (`experimental`)
   * - [EIP-1559](https://eips.ethereum.org/EIPS/eip-1559) - EIP-1559 Fee Market
   * - [EIP-2315](https://eips.ethereum.org/EIPS/eip-2315) - VM simple subroutines (`experimental`)
   * - [EIP-2537](https://eips.ethereum.org/EIPS/eip-2537) - BLS12-381 precompiles (`experimental`)
   * - [EIP-2565](https://eips.ethereum.org/EIPS/eip-2565) - ModExp Gas Cost
   * - [EIP-2718](https://eips.ethereum.org/EIPS/eip-2718) - Typed Transactions
   * - [EIP-2929](https://eips.ethereum.org/EIPS/eip-2929) - Gas cost increases for state access opcodes
   * - [EIP-2930](https://eips.ethereum.org/EIPS/eip-2930) - Access List Transaction Type
   * - [EIP-3198](https://eips.ethereum.org/EIPS/eip-3198) - BASEFEE opcode
   * - [EIP-3529](https://eips.ethereum.org/EIPS/eip-3529) - Reduction in refunds
   * - [EIP-3540](https://eips.ethereum.org/EIPS/eip-3541) - EVM Object Format (EOF) v1 (`experimental`)
   * - [EIP-3541](https://eips.ethereum.org/EIPS/eip-3541) - Reject new contracts starting with the 0xEF byte
   *   [EIP-3651](https://eips.ethereum.org/EIPS/eip-3651) - Warm COINBASE (`experimental`)
   * - [EIP-3670](https://eips.ethereum.org/EIPS/eip-3670) - EOF - Code Validation (`experimental`)
   * - [EIP-3855](https://eips.ethereum.org/EIPS/eip-3855) - PUSH0 instruction (`experimental`)
   * - [EIP-3860](https://eips.ethereum.org/EIPS/eip-3860) - Limit and meter initcode (`experimental`)
   * - [EIP-4399](https://eips.ethereum.org/EIPS/eip-4399) - Supplant DIFFICULTY opcode with PREVRANDAO (Merge)
   *   [EIP-4895](https://eips.ethereum.org/EIPS/eip-4895) - Beacon chain push withdrawals as operations (`experimental`)
   * - [EIP-5133](https://eips.ethereum.org/EIPS/eip-5133) - Delaying Difficulty Bomb to mid-September 2022
]#

type
  EIP* = enum
    EIP3541
    EIP3670
    EIP1559
    EIP2537
    EIP4895

  ForkToEIP* = array[HardFork, set[EIP]]

func makeForkToEIP(): ForkToEIP {.compileTime.} =
  var map: ForkToEIP

  # example:
  # map[London]   = {EIP1559}
  # map[Shanghai] = {EIP3541,EIP3670}

  # the latest fork will accumulate most EIPs
  for fork in HardFork:
    result[fork] = map[fork]
    if fork > Frontier:
      result[fork].incl map[pred(fork)]

const
  ForkToEipList* = makeForktoEip()