85 lines
2.6 KiB
Nim
85 lines
2.6 KiB
Nim
# Nimbus
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# Copyright (c) 2021-2024 Status Research & Development GmbH
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# Licensed under either of
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# * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE))
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# * MIT license ([LICENSE-MIT](LICENSE-MIT))
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# at your option.
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# This file may not be copied, modified, or distributed except according to
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# those terms.
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{.push raises: [].}
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import
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std/[typetraits, tables],
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eth/common/base,
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eth/common/times,
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eth/common/hashes,
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eth/common/addresses,
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stew/endians2,
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stint,
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nimcrypto/sha2,
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./chain_config
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# ------------------------------------------------------------------------------
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# When the client doing initialization step, it will go through
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# complicated steps before the genesis hash is ready. See `CommonRef.init`.
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# If the genesis happen to exists in database belonging to other network,
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# it will replace the one in CommonRef cache.
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# That is the reason why using genesis header or genesis hash + ChainId is
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# not a good solution to prevent loading existing data directory for
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# the wrong network.
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# But the ChainConfig + raw Genesis hash will make the job done before
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# CommonRef creation.
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# ------------------------------------------------------------------------------
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# ------------------------------------------------------------------------------
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# Private helper functions
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# ------------------------------------------------------------------------------
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func update(ctx: var sha256, val: uint64 | UInt256) =
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ctx.update(val.toBytesLE)
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func update(ctx: var sha256, val: ChainId | EthTime | NetworkId) =
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ctx.update(distinctBase val)
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func update(ctx: var sha256, val: bool) =
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ctx.update([val.byte])
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func update(ctx: var sha256, val: Hash32 | Bytes8 | Bytes32 | Address) =
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ctx.update(val.data)
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func update[T](ctx: var sha256, val: Opt[T]) =
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if val.isSome:
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ctx.update(val.get)
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func update[K, V](ctx: var sha256, val: Table[K, V]) =
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mixin update
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for k, v in val:
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ctx.update(k)
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ctx.update(v)
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func update[T: object](ctx: var sha256, val: T) =
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for f in fields(val):
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ctx.update(f)
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func update[T: ref](ctx: var sha256, val: T) =
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for f in fields(val[]):
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ctx.update(f)
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# ------------------------------------------------------------------------------
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# Public functions
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# ------------------------------------------------------------------------------
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func calcHash*(networkId: NetworkId, conf: ChainConfig, genesis: Genesis): Hash32 =
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var ctx: sha256
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ctx.init()
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ctx.update(networkId)
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ctx.update(conf)
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if genesis.isNil.not:
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ctx.update(genesis)
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ctx.finish(result.data)
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ctx.clear()
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func calcHash*(networkId: NetworkId, params: NetworkParams): Hash32 =
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calcHash(networkId, params.config, params.genesis)
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