62 lines
1.9 KiB
Nim
62 lines
1.9 KiB
Nim
{.push raises: [Defect].}
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import
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stew/endians2, stint,
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./extras, ./ssz/merkleization,
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spec/[crypto, datatypes, digest, helpers]
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func get_eth1data_stub*(deposit_count: uint64, current_epoch: Epoch): Eth1Data =
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# https://github.com/ethereum/eth2.0-pm/blob/e596c70a19e22c7def4fd3519e20ae4022349390/interop/mocked_eth1data/README.md
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let
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voting_period = current_epoch.uint64 div EPOCHS_PER_ETH1_VOTING_PERIOD
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Eth1Data(
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deposit_root: hash_tree_root(voting_period),
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deposit_count: deposit_count,
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block_hash: hash_tree_root(hash_tree_root(voting_period).data),
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)
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func makeInteropPrivKey*(i: int): BlsResult[ValidatorPrivKey] =
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var bytes: array[32, byte]
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bytes[0..7] = uint64(i).toBytesLE()
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let
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# BLS381-12 curve order - same as milagro but formatted different
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curveOrder =
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"52435875175126190479447740508185965837690552500527637822603658699938581184513".parse(UInt256)
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privkeyBytes = eth2hash(bytes)
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key = (UInt256.fromBytesLE(privkeyBytes.data) mod curveOrder).toBytesBE()
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ValidatorPrivKey.fromRaw(key)
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const eth1BlockHash* = block:
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var x: Eth2Digest
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for v in x.data.mitems: v = 0x42
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x
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# https://github.com/ethereum/eth2.0-specs/blob/v0.11.1/specs/phase0/deposit-contract.md#withdrawal-credentials
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func makeWithdrawalCredentials*(k: ValidatorPubKey): Eth2Digest =
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var bytes = eth2hash(k.toRaw())
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bytes.data[0] = BLS_WITHDRAWAL_PREFIX.uint8
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bytes
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func makeDeposit*(
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pubkey: ValidatorPubKey, privkey: ValidatorPrivKey, epoch = 0.Epoch,
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amount: Gwei = MAX_EFFECTIVE_BALANCE.Gwei,
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flags: UpdateFlags = {}): Deposit =
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var
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ret = Deposit(
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data: DepositData(
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amount: amount,
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pubkey: pubkey,
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withdrawal_credentials: makeWithdrawalCredentials(pubkey)))
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if skipBLSValidation notin flags:
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let domain = compute_domain(DOMAIN_DEPOSIT)
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let signing_root = compute_signing_root(ret.getDepositMessage, domain)
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ret.data.signature = bls_sign(privkey, signing_root.data)
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ret
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