nimbus-eth1/nimbus/core/clique/clique_defs.nim

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Nim

# Nimbus
# Copyright (c) 2018 Status Research & Development GmbH
# Licensed under either of
# * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
# http://www.apache.org/licenses/LICENSE-2.0)
# * MIT license ([LICENSE-MIT](LICENSE-MIT) or
# http://opensource.org/licenses/MIT)
# at your option. This file may not be copied, modified, or distributed except
# according to those terms.
##
## Clique PoA Constants & Types
## ============================
##
## Constants used by Clique proof-of-authority consensus protocol, see
## `EIP-225 <https://github.com/ethereum/EIPs/blob/master/EIPS/eip-225.md>`_
## and
## `go-ethereum <https://github.com/ethereum/EIPs/blob/master/EIPS/eip-225.md>`_
##
import
std/[times],
eth/common,
stew/results,
stint
{.push raises: [].}
# ------------------------------------------------------------------------------
# Constants copied from eip-225 specs & implementation
# ------------------------------------------------------------------------------
const
# clique/clique.go(48): const ( [..]
CHECKPOINT_INTERVAL* = ##\
## Number of blocks after which to save the vote snapshot to the database
4 * 1024
INMEMORY_SNAPSHOTS* = ##\
## Number of recent vote snapshots to keep in memory.
128
WIGGLE_TIME* = ##\
## PoA mining only (currently unsupported).
##
## Random delay (per signer) to allow concurrent signers
initDuration(seconds = 0, milliseconds = 500)
# clique/clique.go(57): var ( [..]
BLOCK_PERIOD* = ##\
## Minimum difference in seconds between two consecutive block timestamps.
## Suggested time is 15s for the `testnet` to remain analogous to the
## `mainnet` ethash target.
EthTime 15
EXTRA_VANITY* = ##\
## Fixed number of extra-data prefix bytes reserved for signer vanity.
## Suggested 32 bytes to retain the current extra-data allowance and/or use.
32
NONCE_AUTH* = ##\
## Magic nonce number 0xffffffffffffffff to vote on adding a new signer.
0xffffffffffffffffu64.toBlockNonce
NONCE_DROP* = ##\
## Magic nonce number 0x0000000000000000 to vote on removing a signer.
0x0000000000000000u64.toBlockNonce
DIFF_NOTURN* = ##\
## Block score (difficulty) for blocks containing out-of-turn signatures.
## Suggested 1 since it just needs to be an arbitrary baseline constant.
1.u256
DIFF_INTURN* = ##\
## Block score (difficulty) for blocks containing in-turn signatures.
## Suggested 2 to show a slight preference over out-of-turn signatures.
2.u256
# params/network_params.go(60): FullImmutabilityThreshold = 90000
FULL_IMMUTABILITY_THRESHOLD* = ##\
## Number of blocks after which a chain segment is considered immutable (ie.
## soft finality). It is used by the downloader as a hard limit against
## deep ancestors, by the blockchain against deep reorgs, by the freezer as
## the cutoff threshold and by clique as the snapshot trust limit.
90000
# Other
SNAPS_LOG_INTERVAL_MICSECS* = ##\
## Time interval after which the `snapshotApply()` function main loop
## produces logging entries. The original value from the Go reference
## implementation has 8 seconds (which seems a bit long.) For the first
## 300k blocks in the Goerli chain, typical execution time in tests was
## mostly below 300 micro secs.
initDuration(microSeconds = 200)
# ------------------------------------------------------------------------------
# Error tokens
# ------------------------------------------------------------------------------
type
# clique/clique.go(76): var ( [..]
CliqueErrorType* = enum
resetCliqueError = ##\
## Default/reset value (use `cliqueNoError` below rather than this valie)
(0, "no error")
errUnknownBlock = ##\
## is returned when the list of signers is requested for a block that is
## not part of the local blockchain.
"unknown block"
errInvalidCheckpointBeneficiary = ##\
## is returned if a checkpoint/epoch transition block has a beneficiary
## set to non-zeroes.
"beneficiary in checkpoint block non-zero"
errInvalidVote = ##\
## is returned if a nonce value is something else that the two allowed
## constants of 0x00..0 or 0xff..f.
"vote nonce not 0x00..0 or 0xff..f"
errInvalidCheckpointVote = ##\
## is returned if a checkpoint/epoch transition block has a vote nonce
## set to non-zeroes.
"vote nonce in checkpoint block non-zero"
errMissingVanity = ##\
## is returned if a block's extra-data section is shorter than 32 bytes,
## which is required to store the signer vanity.
"extra-data 32 byte vanity prefix missing"
errMissingSignature = ##\
## is returned if a block's extra-data section doesn't seem to contain a
## 65 byte secp256k1 signature.
"extra-data 65 byte signature suffix missing"
errExtraSigners = ##\
## is returned if non-checkpoint block contain signer data in their
## extra-data fields.
"non-checkpoint block contains extra signer list"
errInvalidCheckpointSigners = ##\
## is returned if a checkpoint block contains an invalid list of signers
## (i.e. non divisible by 20 bytes).
"invalid signer list on checkpoint block"
errMismatchingCheckpointSigners = ##\
## is returned if a checkpoint block contains a list of signers different
## than the one the local node calculated.
"mismatching signer list on checkpoint block"
errInvalidMixDigest = ##\
## is returned if a block's mix digest is non-zero.
"non-zero mix digest"
errInvalidUncleHash = ##\
## is returned if a block contains an non-empty uncle list.
"non empty uncle hash"
errInvalidDifficulty = ##\
## is returned if the difficulty of a block neither 1 or 2.
"invalid difficulty"
errWrongDifficulty = ##\
## is returned if the difficulty of a block doesn't match the turn of
## the signer.
"wrong difficulty"
errInvalidTimestamp = ##\
## is returned if the timestamp of a block is lower than the previous
## block's timestamp + the minimum block period.
"invalid timestamp"
errInvalidVotingChain = ##\
## is returned if an authorization list is attempted to be modified via
## out-of-range or non-contiguous headers.
"invalid voting chain"
errUnauthorizedSigner = ##\
## is returned if a header is signed by a non-authorized entity.
"unauthorized signer"
errRecentlySigned = ##\
## is returned if a header is signed by an authorized entity that
## already signed a header recently, thus is temporarily not allowed to.
"recently signed"
# additional errors sources elsewhere
# -----------------------------------
errPublicKeyToShort = ##\
## Cannot retrieve public key
"cannot retrieve public key: too short"
# imported from consensus/errors.go
errUnknownAncestor = ##\
## is returned when validating a block requires an ancestor that is
## unknown.
"unknown ancestor"
errFutureBlock = ##\
## is returned when a block's timestamp is in the future according to
## the current node.
"block in the future"
# additional/bespoke errors, manually added
# -----------------------------------------
errUnknownHash = "No header found for hash value"
errEmptyLruCache = "No snapshot available"
errNotInitialised = ##\
## Initalisation value for `Result` entries
"Not initialised"
errSetLruSnaps = ##\
## Attempt to assign a value to a non-existing slot
"Missing LRU slot for snapshot"
errEcRecover = ##\
## Subsytem error"
"ecRecover failed"
errSnapshotLoad ## DB subsytem error
errSnapshotStore ## ..
errSnapshotClone
errCliqueGasLimitOrBaseFee
errCliqueExceedsGasLimit
errCliqueGasRepriceFork
errCliqueSealSigFn
errCliqueStopped = "process was interrupted"
errCliqueUnclesNotAllowed = "uncles not allowed"
# not really an error
nilCliqueSealNoBlockYet = "Sealing paused, waiting for transactions"
nilCliqueSealSignedRecently = "Signed recently, must wait for others"
# ------------------------------------------------------------------------------
# More types and constants
# ------------------------------------------------------------------------------
type
CliqueError* = ##\
## Error message, tinned component + explanatory text (if any)
(CliqueErrorType,string)
CliqueOkResult* = ##\
## Standard ok/error result type for `Clique` functions
Result[void,CliqueError]
const
cliqueNoError* = ##\
## No-error constant
(resetCliqueError, "")
# ------------------------------------------------------------------------------
# End
# ------------------------------------------------------------------------------