nimbus-eth1/nimbus/genesis.nim

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Nim
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import
tables, json, times, strutils,
eth/[common, rlp, trie], stint, stew/[byteutils],
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chronicles, eth/trie/db,
db/[db_chain, state_db], genesis_alloc, config, constants
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type
Genesis* = object
config*: ChainConfig
nonce*: BlockNonce
timestamp*: EthTime
extraData*: seq[byte]
gasLimit*: GasInt
difficulty*: DifficultyInt
mixhash*: Hash256
coinbase*: EthAddress
alloc*: GenesisAlloc
GenesisAlloc = TableRef[EthAddress, GenesisAccount]
GenesisAccount = object
code*: seq[byte]
storage*: Table[UInt256, UInt256]
balance*: UInt256
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nonce*: AccountNonce
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func toAddress(n: UInt256): EthAddress =
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let a = n.toByteArrayBE()
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result[0 .. ^1] = a.toOpenArray(12, a.high)
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func decodePrealloc(data: seq[byte]): GenesisAlloc =
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result = newTable[EthAddress, GenesisAccount]()
for tup in rlp.decode(data, seq[(UInt256, UInt256)]):
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result[toAddress(tup[0])] = GenesisAccount(balance: tup[1])
proc customNetPrealloc(genesisBlock: JsonNode): GenesisAlloc =
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result = newTable[EthAddress, GenesisAccount]()
for address, account in genesisBlock.pairs():
var acc = GenesisAccount(
balance: fromHex(UInt256, account["balance"].getStr),
code: hexToSeqByte(account["code"].getStr),
nonce: parseHexInt(account["nonce"].getStr).AccountNonce
)
let storage = account["storage"]
for k, v in storage:
acc.storage[fromHex(UInt256, k)] = fromHex(UInt256, v.getStr)
result[parseAddress(address)] = acc
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proc defaultGenesisBlockForNetwork*(id: PublicNetwork): Genesis =
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result = case id
of MainNet:
Genesis(
nonce: 66.toBlockNonce,
extraData: hexToSeqByte("0x11bbe8db4e347b4e8c937c1c8370e4b5ed33adb3db69cbdb7a38e1e50b1b82fa"),
gasLimit: 5000,
difficulty: 17179869184.u256,
alloc: decodePrealloc(mainnetAllocData)
)
of RopstenNet:
Genesis(
nonce: 66.toBlockNonce,
extraData: hexToSeqByte("0x3535353535353535353535353535353535353535353535353535353535353535"),
gasLimit: 16777216,
difficulty: 1048576.u256,
alloc: decodePrealloc(testnetAllocData)
)
of RinkebyNet:
Genesis(
nonce: 0.toBlockNonce,
timestamp: initTime(0x58ee40ba, 0),
extraData: hexToSeqByte("0x52657370656374206d7920617574686f7269746168207e452e436172746d616e42eb768f2244c8811c63729a21a3569731535f067ffc57839b00206d1ad20c69a1981b489f772031b279182d99e65703f0076e4812653aab85fca0f00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"),
gasLimit: 4700000,
difficulty: 1.u256,
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alloc: decodePrealloc(rinkebyAllocData)
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)
of GoerliNet:
Genesis(
nonce: 0.toBlockNonce,
timestamp: initTime(0x5c51a607, 0),
extraData: hexToSeqByte("0x22466c6578692069732061207468696e6722202d204166726900000000000000e0a2bd4258d2768837baa26a28fe71dc079f84c70000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"),
gasLimit: 0xa00000,
difficulty: 1.u256,
alloc: decodePrealloc(goerliAllocData)
)
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of CustomNet:
let genesis = getConfiguration().customGenesis
var alloc = new GenesisAlloc
if genesis.prealloc != parseJson("{}"):
alloc = customNetPrealloc(genesis.prealloc)
Genesis(
nonce: genesis.nonce,
extraData: genesis.extraData,
gasLimit: genesis.gasLimit,
difficulty: genesis.difficulty,
alloc: alloc,
timestamp: genesis.timestamp,
mixhash: genesis.mixHash,
coinbase: genesis.coinbase
)
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else:
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# TODO: Fill out the rest
error "No default genesis for network", id
doAssert(false, "No default genesis for " & $id)
Genesis()
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result.config = publicChainConfig(id)
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proc toBlock*(g: Genesis, db: BaseChainDB = nil): BlockHeader =
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let (tdb, pruneTrie) = if db.isNil: (newMemoryDB(), true)
else: (db.db, db.pruneTrie)
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var trie = initHexaryTrie(tdb)
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var sdb = newAccountStateDB(tdb, trie.rootHash, pruneTrie)
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for address, account in g.alloc:
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sdb.setAccount(address, newAccount(account.nonce, account.balance))
sdb.setCode(address, account.code)
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for k, v in account.storage:
sdb.setStorage(address, k, v)
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var root = sdb.rootHash
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result = BlockHeader(
nonce: g.nonce,
timestamp: g.timestamp,
extraData: g.extraData,
gasLimit: g.gasLimit,
difficulty: g.difficulty,
mixDigest: g.mixhash,
coinbase: g.coinbase,
stateRoot: root,
parentHash: GENESIS_PARENT_HASH,
txRoot: BLANK_ROOT_HASH,
receiptRoot: BLANK_ROOT_HASH,
ommersHash: EMPTY_UNCLE_HASH
)
if g.gasLimit == 0:
result.gasLimit = GENESIS_GAS_LIMIT
if g.difficulty == 0:
result.difficulty = GENESIS_DIFFICULTY
proc commit*(g: Genesis, db: BaseChainDB) =
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let b = g.toBlock(db)
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doAssert(b.blockNumber == 0, "can't commit genesis block with number > 0")
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discard db.persistHeaderToDb(b)
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proc initializeEmptyDb*(db: BaseChainDB) =
trace "Writing genesis to DB"
let networkId = getConfiguration().net.networkId.toPublicNetwork()
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# if networkId == CustomNet:
# raise newException(Exception, "Custom genesis not implemented")
# else:
defaultGenesisBlockForNetwork(networkId).commit(db)