68 lines
2.2 KiB
Nim
68 lines
2.2 KiB
Nim
import
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std/tables,
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stew/results,
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chronicles,
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../datatypes/base
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type
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Entry = object
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recipient: Eth1Address
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addedAt: Epoch
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DynamicFeeRecipientsStore* = object
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mappings: Table[ValidatorIndex, Entry]
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func init*(T: type DynamicFeeRecipientsStore): T =
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T(mappings: initTable[ValidatorIndex, Entry]())
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proc addMapping*(store: var DynamicFeeRecipientsStore,
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validator: ValidatorIndex,
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feeRecipient: Eth1Address,
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currentEpoch: Epoch) =
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var
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found, updated = false
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store.mappings.withValue(validator, entry) do:
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updated = not (entry[].recipient == feeRecipient)
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entry[] = Entry(recipient: feeRecipient, addedAt: currentEpoch)
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do:
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updated = true
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store.mappings[validator] = Entry(recipient: feeRecipient,
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addedAt: currentEpoch)
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if updated:
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info "Updating fee recipient",
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validator, feeRecipient = feeRecipient.toHex(), currentEpoch
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else:
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debug "Refreshing fee recipient",
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validator, feeRecipient = feeRecipient.toHex(), currentEpoch
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func getDynamicFeeRecipient*(store: var DynamicFeeRecipientsStore,
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validator: ValidatorIndex,
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currentEpoch: Epoch): Opt[Eth1Address] =
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store.mappings.withValue(validator, entry) do:
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# https://ethereum.github.io/beacon-APIs/#/ValidatorRequiredApi/prepareBeaconProposer
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#
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# The information supplied for each validator index will persist
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# through the epoch in which the call is submitted and for a further
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# two epochs after that, or until the beacon node restarts.
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#
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# It is expected that validator clients will send this information
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# periodically, for example each epoch, to ensure beacon nodes have
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# correct and timely fee recipient information.
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return if (currentEpoch - entry.addedAt) > 2:
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err()
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else:
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ok entry.recipient
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do:
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return err()
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func pruneOldMappings*(store: var DynamicFeeRecipientsStore,
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currentEpoch: Epoch) =
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var toPrune: seq[ValidatorIndex]
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for idx, entry in store.mappings:
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if (currentEpoch - entry.addedAt) > 2:
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toPrune.add idx
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for idx in toPrune:
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store.mappings.del idx
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