nimbus-eth2/beacon_chain/deposits.nim

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# Copyright (c) 2018-2023 Status Research & Development GmbH
# Licensed and distributed under either of
# * MIT license (license terms in the root directory or at https://opensource.org/licenses/MIT).
# * Apache v2 license (license terms in the root directory or at https://www.apache.org/licenses/LICENSE-2.0).
# at your option. This file may not be copied, modified, or distributed except according to those terms.
{.push raises: [].}
import
std/[os, sequtils, times],
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stew/byteutils,
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chronicles,
./spec/eth2_apis/rest_beacon_client,
./spec/signatures,
./validators/keystore_management,
"."/[conf, beacon_clock, filepath]
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type
ValidatorStorageKind* {.pure.} = enum
Keystore, Identifier
ValidatorStorage* = object
case kind: ValidatorStorageKind
of ValidatorStorageKind.Keystore:
privateKey: ValidatorPrivKey
of ValidatorStorageKind.Identifier:
ident: ValidatorIdent
proc getSignedExitMessage(
config: BeaconNodeConf,
storage: ValidatorStorage,
validatorKeyAsStr: string,
exitAtEpoch: Epoch,
validatorIdx: uint64,
fork: Fork,
genesis_validators_root: Eth2Digest
): SignedVoluntaryExit =
let signingKey =
case storage.kind
of ValidatorStorageKind.Identifier:
let
validatorsDir = config.validatorsDir
keystoreDir = validatorsDir / validatorKeyAsStr
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if not dirExists(keystoreDir):
echo "The validator keystores directory '" & validatorsDir &
"' does not contain a keystore for the selected validator " &
"with public key '" & validatorKeyAsStr & "'."
quit 1
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let signingItem = loadKeystore(
validatorsDir,
config.secretsDir,
validatorKeyAsStr,
config.nonInteractive,
nil)
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if signingItem.isNone:
fatal "Unable to continue without decrypted signing key"
quit 1
signingItem.get().privateKey
of ValidatorStorageKind.Keystore:
storage.privateKey
var signedExit = SignedVoluntaryExit(
message: VoluntaryExit(
epoch: exitAtEpoch,
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validator_index: validatorIdx
)
)
signedExit.signature =
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get_voluntary_exit_signature(fork, genesis_validators_root,
signedExit.message,
signingKey).toValidatorSig()
signedExit
type
ClientExitAction = enum
abort = "q"
confirm = "I understand the implications of submitting a voluntary exit"
proc askForExitConfirmation(): ClientExitAction =
template ask(prompt: string): string =
try:
stdout.write prompt, ": "
stdin.readLine()
except IOError:
fatal "Failed to read user input from stdin"
quit 1
echoP "PLEASE BEWARE!"
echoP "Publishing a voluntary exit is an irreversible operation! " &
"You won't be able to restart again with the same validator."
echoP "You must keep your validator running for at least 5 epochs " &
"(32 minutes) after requesting a validator exit, as you will " &
"still be required to perform validator duties until your exit " &
"has been processed. The number of epochs could be significantly " &
"higher depending on how many other validators are queued to exit."
echoP "As such, we recommend you keep track of your validator's status " &
"using an Eth2 block explorer before shutting down your beacon node."
var choice = ""
while not(choice == $ClientExitAction.confirm or
choice == $ClientExitAction.abort) :
echoP "To proceed to submitting your voluntary exit, please type '" &
$ClientExitAction.confirm &
"' (without the quotes) in the prompt below and " &
"press ENTER or type 'q' to quit."
echo ""
choice = ask "Your choice"
if choice == $ClientExitAction.confirm:
ClientExitAction.confirm
else:
ClientExitAction.abort
proc getValidator*(decryptor: var MultipleKeystoresDecryptor,
name: string): Result[ValidatorStorage, string] =
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let ident = ValidatorIdent.decodeString(name)
if ident.isErr():
if not(isFile(name)):
return err($ident.error)
let key = decryptor.importKeystoreFromFile(name)
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if key.isErr():
return err(key.error())
ok(ValidatorStorage(kind: ValidatorStorageKind.Keystore,
privateKey: key.get()))
else:
ok(ValidatorStorage(kind: ValidatorStorageKind.Identifier,
ident: ident.get()))
func getIdent*(storage: ValidatorStorage): ValidatorIdent =
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case storage.kind
of ValidatorStorageKind.Keystore:
ValidatorIdent(kind: ValidatorQueryKind.Key,
key: storage.privateKey.toPubKey().toPubKey())
of ValidatorStorageKind.Identifier:
storage.ident
proc restValidatorExit(config: BeaconNodeConf) {.async.} =
let
client = RestClientRef.new(config.restUrlForExit).valueOr:
raise (ref RestError)(msg: $error)
stateIdHead = StateIdent(kind: StateQueryKind.Named,
value: StateIdentType.Head)
blockIdentHead = BlockIdent(kind: BlockQueryKind.Named,
value: BlockIdentType.Head)
# Before making any REST requests, we'll make sure that the supplied
# inputs are correct:
var validators: seq[ValidatorStorage]
if config.exitAllValidatorsFlag:
var keystoreCache = KeystoreCacheRef.init()
for keystore in listLoadableKeystores(config, keystoreCache):
validators.add ValidatorStorage(kind: ValidatorStorageKind.Keystore,
privateKey: keystore.privateKey)
else:
var decryptor: MultipleKeystoresDecryptor
defer: dispose decryptor
for pubKey in config.exitedValidators:
let validatorStorage = decryptor.getValidator(pubkey).valueOr:
fatal "Incorrect validator index, key or keystore path specified",
value = pubKey, reason = error
quit 1
validators.add validatorStorage
let genesis = try:
let response = await client.getGenesisPlain()
if response.status == 200:
let genesis = decodeBytes(GetGenesisResponse,
response.data,
response.contentType)
if genesis.isErr():
raise newException(RestError, $genesis.error)
genesis.get().data
else:
raiseGenericError(response)
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except CatchableError as exc:
fatal "Failed to obtain the genesis validators root of the network",
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reason = exc.msg
quit 1
let currentEpoch = block:
let
genesisTime = genesis.genesis_time
beaconClock = BeaconClock.init(genesisTime)
time = getTime()
slot = beaconClock.toSlot(time).slot
Epoch(slot.uint64 div 32)
let exitAtEpoch = if config.exitAtEpoch.isSome:
Epoch config.exitAtEpoch.get
else:
currentEpoch
let fork = try:
let response = await client.getStateForkPlain(stateIdHead)
if response.status == 200:
let fork = decodeBytes(GetStateForkResponse,
response.data,
response.contentType)
if fork.isErr():
raise newException(RestError, $fork.error)
fork.get().data
else:
raiseGenericError(response)
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except CatchableError as exc:
fatal "Failed to obtain the fork id of the head state",
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reason = exc.msg
quit 1
let signingFork = try:
let response = await client.getSpec()
if response.status == 200:
let spec = response.data
# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/phase0/beacon-chain.md#voluntary-exits
# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.0/specs/deneb/beacon-chain.md#modified-process_voluntary_exit
if currentEpoch >= Epoch(spec.data.DENEB_FORK_EPOCH):
Fork(
current_version: spec.data.CAPELLA_FORK_VERSION,
previous_version: spec.data.CAPELLA_FORK_VERSION,
epoch: GENESIS_EPOCH) # irrelevant when current/previous identical
else:
fork
else:
raise newException(RestError, "Error response (" & $response.status & ")")
except CatchableError as exc:
fatal "Failed to obtain the config spec of the beacon node",
reason = exc.msg
quit 1
if not config.printData:
case askForExitConfirmation()
of ClientExitAction.abort:
quit 0
of ClientExitAction.confirm:
discard
var hadErrors = false
for validator in validators:
let restValidator = try:
let response = await client.getStateValidatorPlain(stateIdHead, validator.getIdent)
if response.status == 200:
let validatorInfo = decodeBytes(GetStateValidatorResponse,
response.data, response.contentType)
if validatorInfo.isErr():
raise newException(RestError, $validatorInfo.error)
validatorInfo.get().data
else:
raiseGenericError(response)
except CatchableError as exc:
fatal "Failed to obtain information for validator", reason = exc.msg
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quit 1
let
validatorIdx = restValidator.index.uint64
validatorKey = restValidator.validator.pubkey
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let
genesis_validators_root = genesis.genesis_validators_root
validatorKeyAsStr = "0x" & $validatorKey
signedExit = getSignedExitMessage(config,
validator,
validatorKeyAsStr,
exitAtEpoch,
validatorIdx,
fork,
genesis_validators_root)
if config.printData:
let bytes = encodeBytes(signedExit, "application/json").valueOr:
error "Unable to serialize signed exit message", reason = error
hadErrors = true
continue
echoP "You can use following command to send voluntary exit message to " &
"remote beacon node host:\n"
echo "curl -X 'POST' \\"
echo " '" & config.restUrlForExit &
"/eth/v1/beacon/pool/voluntary_exits' \\"
echo " -H 'Accept: */*' \\"
echo " -H 'Content-Type: application/json' \\"
echo " -d '" & string.fromBytes(bytes) & "'"
quit 0
else:
try:
let
validatorDesc = $validatorIdx & "(" & validatorKeyAsStr[0..9] & ")"
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response = await client.submitPoolVoluntaryExit(signedExit)
success = response.status == 200
if success:
echo "Successfully published voluntary exit for validator " &
validatorDesc & "."
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else:
hadErrors = true
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let responseError = try:
Json.decode(response.data, RestErrorMessage)
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except CatchableError as exc:
error "Failed to decode invalid error server response on " &
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"`submitPoolVoluntaryExit` request", reason = exc.msg
continue
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let
responseMessage = responseError.message
responseStacktraces = responseError.stacktraces
echo "The voluntary exit for validator " & validatorDesc &
" was not submitted successfully."
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echo responseMessage & ":"
for el in responseStacktraces.get():
echo el
echoP "Please try again."
except CatchableError as err:
fatal "Failed to send the signed exit message",
signedExit, reason = err.msg
hadErrors = true
if hadErrors:
quit 1
proc handleValidatorExitCommand(config: BeaconNodeConf) {.async.} =
await restValidatorExit(config)
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proc doDeposits*(config: BeaconNodeConf, rng: var HmacDrbgContext) {.
raises: [CatchableError].} =
case config.depositsCmd
of DepositsCmd.createTestnetDeposits:
if config.eth2Network.isNone:
fatal "Please specify the intended testnet for the deposits"
quit 1
let metadata = config.loadEth2Network()
var seed: KeySeed
defer: burnMem(seed)
var walletPath: WalletPathPair
if config.existingWalletId.isSome:
let
id = config.existingWalletId.get
found = findWallet(config, id).valueOr:
fatal "Failed to locate wallet", error = error
quit 1
if found.isSome:
walletPath = found.get
else:
fatal "Unable to find wallet with the specified name/uuid", id
quit 1
var unlocked = unlockWalletInteractively(walletPath.wallet)
if unlocked.isOk:
swap(seed, unlocked.get)
else:
# The failure will be reported in `unlockWalletInteractively`.
quit 1
else:
var walletRes = createWalletInteractively(rng, config)
if walletRes.isErr:
fatal "Unable to create wallet", err = walletRes.error
quit 1
else:
swap(seed, walletRes.get.seed)
walletPath = walletRes.get.walletPath
if (let res = secureCreatePath(config.outValidatorsDir); res.isErr):
fatal "Could not create directory",
path = config.outValidatorsDir, err = ioErrorMsg(res.error)
quit QuitFailure
if (let res = secureCreatePath(config.outSecretsDir); res.isErr):
fatal "Could not create directory",
path = config.outSecretsDir, err = ioErrorMsg(res.error)
quit QuitFailure
let deposits = generateDeposits(
metadata.cfg,
rng,
seed,
walletPath.wallet.nextAccount,
config.totalDeposits,
config.outValidatorsDir,
config.outSecretsDir,
@[], 0, 0,
KeystoreMode.Fast)
if deposits.isErr:
fatal "Failed to generate deposits", err = deposits.error
quit 1
try:
let depositDataPath = if config.outDepositsFile.isSome:
config.outDepositsFile.get.string
else:
config.outValidatorsDir / "deposit_data-" & $epochTime() & ".json"
let launchPadDeposits =
mapIt(deposits.value, LaunchPadDeposit.init(metadata.cfg, it))
Json.saveFile(depositDataPath, launchPadDeposits)
echo "Deposit data written to \"", depositDataPath, "\""
walletPath.wallet.nextAccount += deposits.value.len
let status = saveWallet(walletPath)
if status.isErr:
fatal "Failed to update wallet file after generating deposits",
wallet = walletPath.path,
error = status.error
quit 1
except CatchableError as err:
fatal "Failed to create launchpad deposit data file", err = err.msg
quit 1
#[
of DepositsCmd.status:
echo "The status command is not implemented yet"
quit 1
]#
of DepositsCmd.`import`:
let validatorKeysDir = if config.importedDepositsDir.isSome:
config.importedDepositsDir.get
else:
let cwd = os.getCurrentDir()
if dirExists(cwd / "validator_keys"):
InputDir(cwd / "validator_keys")
else:
echo "The default search path for validator keys is a sub-directory " &
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"named 'validator_keys' in the current working directory. " &
" Since no such directory exists, please either provide the " &
"correct path as an argument or copy the imported keys in the " &
"expected location."
quit 1
importKeystoresFromDir(
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rng, config.importMethod,
validatorKeysDir.string,
config.validatorsDir, config.secretsDir)
of DepositsCmd.exit:
waitFor handleValidatorExitCommand(config)