135 lines
4.3 KiB
Nim
135 lines
4.3 KiB
Nim
# Nimbus
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# Copyright (c) 2018 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) or
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# http://www.apache.org/licenses/LICENSE-2.0)
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# * MIT license ([LICENSE-MIT](LICENSE-MIT) or
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# http://opensource.org/licenses/MIT)
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# at your option. This file may not be copied, modified, or distributed except
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# according to those terms.
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{.push raises: [].}
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import
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../../common/common,
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../../utils/utils,
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../pow,
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../clique,
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../validate
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export
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common
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type
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ChainRef* = ref object of RootRef
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com: CommonRef
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## common block chain configuration
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## used throughout entire app
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validateBlock: bool ##\
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## If turn off, `persistBlocks` will always return
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## ValidationResult.OK and disable extraValidation too.
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extraValidation: bool ##\
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## Trigger extra validation, currently within `persistBlocks()`
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## function only.
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verifyFrom: BlockNumber ##\
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## First block to when `extraValidation` will be applied (only
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## effective if `extraValidation` is true.)
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# ------------------------------------------------------------------------------
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# Private constructor helper
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# ------------------------------------------------------------------------------
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proc initChain(c: ChainRef; com: CommonRef; extraValidation: bool) =
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## Constructor for the `Chain` descriptor object.
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c.com = com
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c.validateBlock = true
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c.extraValidation = extraValidation
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# ------------------------------------------------------------------------------
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# Public constructors
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# ------------------------------------------------------------------------------
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proc newChain*(com: CommonRef, extraValidation: bool): ChainRef =
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## Constructor for the `Chain` descriptor object.
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## The argument `extraValidation` enables extra block
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## chain validation if set `true`.
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new result
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result.initChain(com, extraValidation)
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proc newChain*(com: CommonRef): ChainRef =
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## Constructor for the `Chain` descriptor object. All sub-object descriptors
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## are initialised with defaults. So is extra block chain validation
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## * `enabled` for PoA networks (such as Goerli)
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## * `disabled` for non-PaA networks
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new result
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result.initChain(com, com.consensus == ConsensusType.POA)
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# ------------------------------------------------------------------------------
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# Public `Chain` getters
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# ------------------------------------------------------------------------------
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proc clique*(c: ChainRef): Clique =
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## Getter
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c.com.poa
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proc pow*(c: ChainRef): PowRef =
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## Getter
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c.com.pow
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proc db*(c: ChainRef): ChainDBRef =
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## Getter
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c.com.db
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proc com*(c: ChainRef): CommonRef =
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## Getter
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c.com
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proc validateBlock*(c: ChainRef): bool =
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## Getter
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c.validateBlock
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proc extraValidation*(c: ChainRef): bool =
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## Getter
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c.extraValidation
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proc verifyFrom*(c: ChainRef): BlockNumber =
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## Getter
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c.verifyFrom
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proc currentBlock*(c: ChainRef): BlockHeader
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{.gcsafe, raises: [CatchableError].} =
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## currentBlock retrieves the current head block of the canonical chain.
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## Ideally the block should be retrieved from the blockchain's internal cache.
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## but now it's enough to retrieve it from database
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c.db.getCanonicalHead()
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# ------------------------------------------------------------------------------
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# Public `Chain` setters
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# ------------------------------------------------------------------------------
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proc `validateBlock=`*(c: ChainRef; validateBlock: bool) =
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## Setter. If set `true`, the assignment value `validateBlock` enables
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## block execution, else it will always return ValidationResult.OK
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c.validateBlock = validateBlock
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proc `extraValidation=`*(c: ChainRef; extraValidation: bool) =
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## Setter. If set `true`, the assignment value `extraValidation` enables
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## extra block chain validation.
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c.extraValidation = extraValidation
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proc `verifyFrom=`*(c: ChainRef; verifyFrom: BlockNumber) =
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## Setter. The assignment value `verifyFrom` defines the first block where
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## validation should start if the `Clique` field `extraValidation` was set
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## `true`.
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c.verifyFrom = verifyFrom
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proc `verifyFrom=`*(c: ChainRef; verifyFrom: uint64) =
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## Variant of `verifyFrom=`
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c.verifyFrom = verifyFrom.u256
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# ------------------------------------------------------------------------------
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# End
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# ------------------------------------------------------------------------------
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