nimbus-eth2/beacon_chain/validator_keygen.nim

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import
os, strutils,
chronicles, chronos, blscurve, nimcrypto, json_serialization, serialization,
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web3, stint, eth/keys,
spec/[datatypes, digest, crypto], conf, ssz, interop, merkle_minimal
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contract(DepositContract):
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proc deposit(pubkey: Bytes48, withdrawalCredentials: Bytes32, signature: Bytes96, deposit_data_root: FixedBytes[32])
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type
DelayGenerator* = proc(): chronos.Duration {.closure, gcsafe.}
proc writeTextFile(filename: string, contents: string) =
writeFile(filename, contents)
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# echo "Wrote ", filename
proc writeFile(filename: string, value: auto) =
Json.saveFile(filename, value, pretty = true)
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# echo "Wrote ", filename
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proc ethToWei(eth: UInt256): UInt256 =
eth * 1000000000000000000.u256
proc generateDeposits*(totalValidators: int,
outputDir: string,
randomKeys: bool,
firstIdx = 0): seq[Deposit] =
info "Generating deposits", totalValidators, outputDir, randomKeys
for i in 0 ..< totalValidators:
let
v = validatorFileBaseName(firstIdx + i)
depositFn = outputDir / v & ".deposit.json"
privKeyFn = outputDir / v & ".privkey"
if existsFile(depositFn) and existsFile(privKeyFn):
try:
result.add Json.loadFile(depositFn, Deposit)
continue
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except SerializationError as err:
debug "Rewriting unreadable deposit", err = err.formatMsg(depositFn)
discard
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var
privkey{.noInit.}: ValidatorPrivKey
pubKey{.noInit.}: ValidatorPubKey
if randomKeys:
(pubKey, privKey) = crypto.newKeyPair().tryGet()
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else:
privKey = makeInteropPrivKey(i).tryGet()
pubKey = privKey.toPubKey()
let dp = makeDeposit(pubKey, privKey)
result.add(dp)
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# Does quadratic additional work, but fast enough, and otherwise more
# cleanly allows free intermixing of pre-existing and newly generated
# deposit and private key files. TODO: only generate new Merkle proof
# for the most recent deposit if this becomes bottleneck.
attachMerkleProofs(result)
writeTextFile(privKeyFn, privKey.toHex())
writeFile(depositFn, result[result.len - 1])
proc sendDeposits*(
deposits: seq[Deposit],
web3Url, depositContractAddress, privateKey: string,
delayGenerator: DelayGenerator = nil) {.async.} =
var web3 = await newWeb3(web3Url)
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if privateKey.len != 0:
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web3.privateKey = PrivateKey.fromHex(privateKey).tryGet()
else:
let accounts = await web3.provider.eth_accounts()
if accounts.len == 0:
error "No account offered by the web3 provider", web3Url
return
web3.defaultAccount = accounts[0]
let contractAddress = Address.fromHex(depositContractAddress)
for i, dp in deposits:
let depositContract = web3.contractSender(DepositContract, contractAddress)
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discard await depositContract.deposit(
Bytes48(dp.data.pubKey.toRaw()),
Bytes32(dp.data.withdrawal_credentials.data),
Bytes96(dp.data.signature.toRaw()),
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FixedBytes[32](hash_tree_root(dp.data).data)).send(value = 32.u256.ethToWei, gasPrice = 1)
if delayGenerator != nil:
await sleepAsync(delayGenerator())
when isMainModule:
import confutils
cli do (totalValidators: int = 125000,
outputDir: string = "validators",
randomKeys: bool = false,
web3Url: string = "",
depositContractAddress: string = ""):
let deposits = generateDeposits(totalValidators, outputDir, randomKeys)
if web3Url.len() > 0 and depositContractAddress.len() > 0:
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echo "Sending deposits to eth1..."
waitFor sendDeposits(deposits, web3Url, depositContractAddress, "")
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echo "Done"