import ospaths, stew/endians2, stint, ./extras, ./ssz, spec/[crypto, datatypes, digest, helpers] func get_eth1data_stub*(deposit_count: uint64, current_epoch: Epoch): Eth1Data = # https://github.com/ethereum/eth2.0-pm/blob/e596c70a19e22c7def4fd3519e20ae4022349390/interop/mocked_eth1data/README.md let epochs_per_period = SLOTS_PER_ETH1_VOTING_PERIOD div SLOTS_PER_EPOCH voting_period = current_epoch.uint64 div epochs_per_period.uint64 Eth1Data( deposit_root: hash_tree_root(voting_period), deposit_count: deposit_count, block_hash: hash_tree_root(hash_tree_root(voting_period).data), ) when ValidatorPrivKey is BlsValue: func makeInteropPrivKey*(i: int): ValidatorPrivKey = discard {.fatal: "todo/unused?".} else: func makeInteropPrivKey*(i: int): ValidatorPrivKey = var bytes: array[32, byte] bytes[0..7] = uint64(i).toBytesLE() let # BLS381-12 curve order - same as milagro but formatted different curveOrder = "52435875175126190479447740508185965837690552500527637822603658699938581184513".parse(UInt256) privkeyBytes = eth2hash(bytes) key = (UInt256.fromBytesLE(privkeyBytes.data) mod curveOrder).toBytesBE() ValidatorPrivKey.init(key) const eth1BlockHash* = block: var x: Eth2Digest for v in x.data.mitems: v = 0x42 x func makeWithdrawalCredentials*(k: ValidatorPubKey): Eth2Digest = # https://github.com/ethereum/eth2.0-specs/blob/v0.9.0/specs/core/0_deposit-contract.md#withdrawal-credentials var bytes = eth2hash(k.getBytes()) bytes.data[0] = BLS_WITHDRAWAL_PREFIX.uint8 bytes func makeDeposit*( pubkey: ValidatorPubKey, privkey: ValidatorPrivKey, epoch = 0.Epoch, amount: Gwei = MAX_EFFECTIVE_BALANCE.Gwei, flags: UpdateFlags = {}): Deposit = var ret = Deposit( data: DepositData( amount: amount, pubkey: pubkey, withdrawal_credentials: makeWithdrawalCredentials(pubkey))) if skipValidation notin flags: ret.data.signature = bls_sign( privkey, signing_root(ret.data).data, compute_domain(DOMAIN_DEPOSIT)) ret