90 lines
3.5 KiB
Nim
90 lines
3.5 KiB
Nim
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import
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stint, math, strutils, utils/padding, eth_common
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proc default(t: typedesc): t = discard
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# constants
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let
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UINT_256_MAX*: UInt256 = high(UInt256)
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INT_256_MAX_AS_UINT256* = cast[Uint256](high(Int256))
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NULLBYTE* = "\x00"
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EMPTYWORD* = repeat(NULLBYTE, 32)
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UINT160CEILING*: UInt256 = 2.u256.pow(160)
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ZERO_ADDRESS* = default(EthAddress)
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CREATE_CONTRACT_ADDRESS* = ZERO_ADDRESS
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ZERO_HASH32* = Hash256()
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STACK_DEPTH_LIMIT* = 1024
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GAS_LIMIT_EMA_DENOMINATOR* = 1_024
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GAS_LIMIT_ADJUSTMENT_FACTOR* = 1_024
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GAS_LIMIT_USAGE_ADJUSTMENT_NUMERATOR* = 3
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GAS_LIMIT_USAGE_ADJUSTMENT_DENOMINATOR* = 2
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DIFFICULTY_ADJUSTMENT_DENOMINATOR* = 2_048.u256
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DIFFICULTY_MINIMUM* = 131_072.u256
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BYZANTIUM_DIFFICULTY_ADJUSTMENT_CUTOFF* = 9
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BOMB_EXPONENTIAL_PERIOD* = 100_000.u256
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BOMB_EXPONENTIAL_FREE_PERIODS* = 2.u256
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BLOCK_REWARD* = 5.u256 * 2.u256 # denoms.ether
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UNCLE_DEPTH_PENALTY_FACTOR* = 8.u256
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MAX_UNCLE_DEPTH* = 6.u256
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MAX_UNCLES* = 2.u256
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EMPTY_UNCLE_HASH* = "1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347".toDigest
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GENESIS_BLOCK_NUMBER* = 0.u256
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GENESIS_DIFFICULTY* = 131_072.u256
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GENESIS_GAS_LIMIT* = 3_141_592
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GENESIS_PARENT_HASH* = ZERO_HASH32
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GENESIS_COINBASE* = ZERO_ADDRESS
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GENESIS_NONCE* = "\x00\x00\x00\x00\x00\x00\x00B"
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GENESIS_MIX_HASH* = ZERO_HASH32
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GENESIS_EXTRA_DATA* = ""
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GAS_LIMIT_MINIMUM* = 5000
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EMPTYSHA3 = "\xc5\xd2F\x01\x86\xf7#<\x92~}\xb2\xdc\xc7\x03\xc0\xe5\x00\xb6S\xca\x82';{\xfa\xd8\x04]\x85\xa4p"
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BLANK_ROOT_HASH* = "56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421".toDigest()
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GAS_MOD_EXP_QUADRATIC_DENOMINATOR* = 20.u256
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MAX_PREV_HEADER_DEPTH* = 256.u256
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FORK_ICEAGE_BLKNUM* = 200_000.u256
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FORK_HOMESTED_BLKNUM* = 1_150_000.u256
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FORK_DAO_BLKNUM* = 1_920_000.u256
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FORK_TANGERINE_WHISTLE_BLKNUM* = 2_463_000.u256
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FORK_SPURIOUS_DRAGON_BLKNUM* = 2_675_000.u256
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FORK_BYZANTIUM_BLKNUM* = 4_370_000.u256
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# TODO: Move the below to a new utils unit?
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type
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Fork = enum fkUnknown, fkFrontier, fkIceAge, fkHomested, fkDao, fkTangerineWhistle, fkSpuriousDragon, fkByzantium
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UInt256Pair = tuple[a: Uint256, b: Uint256]
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proc `..`*(a, b: Uint256): UInt256Pair = (a, b)
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proc contains*(ab: UInt256Pair, v: UInt256): bool =
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return v >= ab[0] and v <= ab[1]
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proc toFork*(blockNumber: UInt256): Fork =
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# TODO - Refactoring: superseded by newNimbusVM for the time being #https://github.com/status-im/nimbus/pull/37
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# TODO - Refactoring: redundant with `chain.nim` getVM
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result = fkUnknown
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let one = u256(1)
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if blockNumber in u256(0)..FORK_ICEAGE_BLKNUM - one: result = fkFrontier
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elif blockNumber in FORK_ICEAGE_BLKNUM..FORK_HOMESTED_BLKNUM - one: result = fkIceAge
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elif blockNumber in FORK_HOMESTED_BLKNUM..FORK_DAO_BLKNUM - one: result = fkHomested
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elif blockNumber in FORK_DAO_BLKNUM..FORK_TANGERINE_WHISTLE_BLKNUM - one: result = fkDao
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elif blockNumber in FORK_TANGERINE_WHISTLE_BLKNUM..FORK_SPURIOUS_DRAGON_BLKNUM - one: result = fkTangerineWhistle
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elif blockNumber in FORK_SPURIOUS_DRAGON_BLKNUM..FORK_BYZANTIUM_BLKNUM - one: result = fkSpuriousDragon
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else:
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if blockNumber >= FORK_BYZANTIUM_BLKNUM: result = fkByzantium # Update for constantinople when announced
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