From cfb02e19d353c76bc860f3d251eeae7fd2d650ea Mon Sep 17 00:00:00 2001 From: Mark Spanbroek Date: Tue, 7 Dec 2021 12:44:30 +0100 Subject: [PATCH] Use actual Eth2 deposit contract for test --- tests/depositcontract.nim | 392 ++++++++++++++++++++++++++++++++ tests/test_deposit_contract.nim | 9 +- 2 files changed, 395 insertions(+), 6 deletions(-) create mode 100644 tests/depositcontract.nim diff --git a/tests/depositcontract.nim b/tests/depositcontract.nim new file mode 100644 index 0000000..7a5c443 --- /dev/null +++ b/tests/depositcontract.nim @@ -0,0 +1,392 @@ +#[ +// ┏━━━┓━┏┓━┏┓━━┏━━━┓━━┏━━━┓━━━━┏━━━┓━━━━━━━━━━━━━━━━━━━┏┓━━━━━┏━━━┓━━━━━━━━━┏┓━━━━━━━━━━━━━━┏┓━ +// ┃┏━━┛┏┛┗┓┃┃━━┃┏━┓┃━━┃┏━┓┃━━━━┗┓┏┓┃━━━━━━━━━━━━━━━━━━┏┛┗┓━━━━┃┏━┓┃━━━━━━━━┏┛┗┓━━━━━━━━━━━━┏┛┗┓ +// ┃┗━━┓┗┓┏┛┃┗━┓┗┛┏┛┃━━┃┃━┃┃━━━━━┃┃┃┃┏━━┓┏━━┓┏━━┓┏━━┓┏┓┗┓┏┛━━━━┃┃━┗┛┏━━┓┏━┓━┗┓┏┛┏━┓┏━━┓━┏━━┓┗┓┏┛ +// ┃┏━━┛━┃┃━┃┏┓┃┏━┛┏┛━━┃┃━┃┃━━━━━┃┃┃┃┃┏┓┃┃┏┓┃┃┏┓┃┃━━┫┣┫━┃┃━━━━━┃┃━┏┓┃┏┓┃┃┏┓┓━┃┃━┃┏┛┗━┓┃━┃┏━┛━┃┃━ +// ┃┗━━┓━┃┗┓┃┃┃┃┃┃┗━┓┏┓┃┗━┛┃━━━━┏┛┗┛┃┃┃━┫┃┗┛┃┃┗┛┃┣━━┃┃┃━┃┗┓━━━━┃┗━┛┃┃┗┛┃┃┃┃┃━┃┗┓┃┃━┃┗┛┗┓┃┗━┓━┃┗┓ +// ┗━━━┛━┗━┛┗┛┗┛┗━━━┛┗┛┗━━━┛━━━━┗━━━┛┗━━┛┃┏━┛┗━━┛┗━━┛┗┛━┗━┛━━━━┗━━━┛┗━━┛┗┛┗┛━┗━┛┗┛━┗━━━┛┗━━┛━┗━┛ +// ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┃┃━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ +// ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┗┛━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ + +// SPDX-License-Identifier: CC0-1.0 + +pragma solidity 0.6.11; + +// This interface is designed to be compatible with the Vyper version. +/// @notice This is the Ethereum 2.0 deposit contract interface. +/// For more information see the Phase 0 specification under https://github.com/ethereum/eth2.0-specs +interface IDepositContract { + /// @notice A processed deposit event. + event DepositEvent( + bytes pubkey, + bytes withdrawal_credentials, + bytes amount, + bytes signature, + bytes index + ); + + /// @notice Submit a Phase 0 DepositData object. + /// @param pubkey A BLS12-381 public key. + /// @param withdrawal_credentials Commitment to a public key for withdrawals. + /// @param signature A BLS12-381 signature. + /// @param deposit_data_root The SHA-256 hash of the SSZ-encoded DepositData object. + /// Used as a protection against malformed input. + function deposit( + bytes calldata pubkey, + bytes calldata withdrawal_credentials, + bytes calldata signature, + bytes32 deposit_data_root + ) external payable; + + /// @notice Query the current deposit root hash. + /// @return The deposit root hash. + function get_deposit_root() external view returns (bytes32); + + /// @notice Query the current deposit count. + /// @return The deposit count encoded as a little endian 64-bit number. + function get_deposit_count() external view returns (bytes memory); +} + +// Based on official specification in https://eips.ethereum.org/EIPS/eip-165 +interface ERC165 { + /// @notice Query if a contract implements an interface + /// @param interfaceId The interface identifier, as specified in ERC-165 + /// @dev Interface identification is specified in ERC-165. This function + /// uses less than 30,000 gas. + /// @return `true` if the contract implements `interfaceId` and + /// `interfaceId` is not 0xffffffff, `false` otherwise + function supportsInterface(bytes4 interfaceId) external pure returns (bool); +} + +// This is a rewrite of the Vyper Eth2.0 deposit contract in Solidity. +// It tries to stay as close as possible to the original source code. +/// @notice This is the Ethereum 2.0 deposit contract interface. +/// For more information see the Phase 0 specification under https://github.com/ethereum/eth2.0-specs +contract DepositContract is IDepositContract, ERC165 { + uint constant DEPOSIT_CONTRACT_TREE_DEPTH = 32; + // NOTE: this also ensures `deposit_count` will fit into 64-bits + uint constant MAX_DEPOSIT_COUNT = 2**DEPOSIT_CONTRACT_TREE_DEPTH - 1; + + bytes32[DEPOSIT_CONTRACT_TREE_DEPTH] branch; + uint256 deposit_count; + + bytes32[DEPOSIT_CONTRACT_TREE_DEPTH] zero_hashes; + + constructor() public { + // Compute hashes in empty sparse Merkle tree + for (uint height = 0; height < DEPOSIT_CONTRACT_TREE_DEPTH - 1; height++) + zero_hashes[height + 1] = sha256(abi.encodePacked(zero_hashes[height], zero_hashes[height])); + } + + function get_deposit_root() override external view returns (bytes32) { + bytes32 node; + uint size = deposit_count; + for (uint height = 0; height < DEPOSIT_CONTRACT_TREE_DEPTH; height++) { + if ((size & 1) == 1) + node = sha256(abi.encodePacked(branch[height], node)); + else + node = sha256(abi.encodePacked(node, zero_hashes[height])); + size /= 2; + } + return sha256(abi.encodePacked( + node, + to_little_endian_64(uint64(deposit_count)), + bytes24(0) + )); + } + + function get_deposit_count() override external view returns (bytes memory) { + return to_little_endian_64(uint64(deposit_count)); + } + + function deposit( + bytes calldata pubkey, + bytes calldata withdrawal_credentials, + bytes calldata signature, + bytes32 deposit_data_root + ) override external payable { + // Extended ABI length checks since dynamic types are used. + require(pubkey.length == 48, "DepositContract: invalid pubkey length"); + require(withdrawal_credentials.length == 32, "DepositContract: invalid withdrawal_credentials length"); + require(signature.length == 96, "DepositContract: invalid signature length"); + + // Check deposit amount + require(msg.value >= 1 ether, "DepositContract: deposit value too low"); + require(msg.value % 1 gwei == 0, "DepositContract: deposit value not multiple of gwei"); + uint deposit_amount = msg.value / 1 gwei; + require(deposit_amount <= type(uint64).max, "DepositContract: deposit value too high"); + + // Emit `DepositEvent` log + bytes memory amount = to_little_endian_64(uint64(deposit_amount)); + emit DepositEvent( + pubkey, + withdrawal_credentials, + amount, + signature, + to_little_endian_64(uint64(deposit_count)) + ); + + // Compute deposit data root (`DepositData` hash tree root) + bytes32 pubkey_root = sha256(abi.encodePacked(pubkey, bytes16(0))); + bytes32 signature_root = sha256(abi.encodePacked( + sha256(abi.encodePacked(signature[:64])), + sha256(abi.encodePacked(signature[64:], bytes32(0))) + )); + bytes32 node = sha256(abi.encodePacked( + sha256(abi.encodePacked(pubkey_root, withdrawal_credentials)), + sha256(abi.encodePacked(amount, bytes24(0), signature_root)) + )); + + // Verify computed and expected deposit data roots match + require(node == deposit_data_root, "DepositContract: reconstructed DepositData does not match supplied deposit_data_root"); + + // Avoid overflowing the Merkle tree (and prevent edge case in computing `branch`) + require(deposit_count < MAX_DEPOSIT_COUNT, "DepositContract: merkle tree full"); + + // Add deposit data root to Merkle tree (update a single `branch` node) + deposit_count += 1; + uint size = deposit_count; + for (uint height = 0; height < DEPOSIT_CONTRACT_TREE_DEPTH; height++) { + if ((size & 1) == 1) { + branch[height] = node; + return; + } + node = sha256(abi.encodePacked(branch[height], node)); + size /= 2; + } + // As the loop should always end prematurely with the `return` statement, + // this code should be unreachable. We assert `false` just to be safe. + assert(false); + } + + function supportsInterface(bytes4 interfaceId) override external pure returns (bool) { + return interfaceId == type(ERC165).interfaceId || interfaceId == type(IDepositContract).interfaceId; + } + + function to_little_endian_64(uint64 value) internal pure returns (bytes memory ret) { + ret = new bytes(8); + bytes8 bytesValue = bytes8(value); + // Byteswapping during copying to bytes. + ret[0] = bytesValue[7]; + ret[1] = bytesValue[6]; + ret[2] = bytesValue[5]; + ret[3] = bytesValue[4]; + ret[4] = bytesValue[3]; + ret[5] = bytesValue[2]; + ret[6] = bytesValue[1]; + ret[7] = bytesValue[0]; + } +} +]# + +# source: https://etherscan.io/address/0x00000000219ab540356cbb839cbe05303d7705fa#code + +const DepositContractCode* = "0x" & + "608060405234801561001057600080fd5b5060005b601f811015610102576002" & + "6021826020811061002c57fe5b01546021836020811061003b57fe5b01546040" & + "5160200180838152602001828152602001925050506040516020818303038152" & + "906040526040518082805190602001908083835b602083106100925780518252" & + "601f199092019160209182019101610073565b51815160209384036101000a60" & + "001901801990921691161790526040519190930194509192505080830381855a" & + "fa1580156100d1573d6000803e3d6000fd5b5050506040513d60208110156100" & + "e657600080fd5b5051602160018301602081106100f857fe5b01556001016100" & + "14565b506118d680620001136000396000f3fe60806040526004361061003f57" & + "60003560e01c806301ffc9a71461004457806322895118146100a4578063621f" & + "d130146101ba578063c5f2892f14610244575b600080fd5b3480156100505760" & + "0080fd5b506100906004803603602081101561006757600080fd5b50357fffff" & + "ffff000000000000000000000000000000000000000000000000000000001661" & + "026b565b604080519115158252519081900360200190f35b6101b86004803603" & + "60808110156100ba57600080fd5b810190602081018135640100000000811115" & + "6100d557600080fd5b8201836020820111156100e757600080fd5b8035906020" & + 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"8060031a60f81b8260048151811061160057fe5b60200101907effffffffffff" & + "ffffffffffffffffffffffffffffffffffffffffffffffffff1916908160001a" & + "9053508060021a60f81b8260058151811061164357fe5b60200101907effffff" & + "ffffffffffffffffffffffffffffffffffffffffffffffffffffffff19169081" & + "60001a9053508060011a60f81b8260068151811061168657fe5b60200101907e" & + "ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff19" & + "16908160001a9053508060001a60f81b826007815181106116c957fe5b602001" & + "01907effffffffffffffffffffffffffffffffffffffffffffffffffffffffff" & + "ffff1916908160001a90535050919050565b6000808585111561170d578182fd" & + "5b83861115611719578182fd5b505082019391909203915056fe4465706f7369" & + "74436f6e74726163743a206d65726b6c6520747265652066756c6c4465706f73" & + "6974436f6e74726163743a207265636f6e7374727563746564204465706f7369" & + "744461746120646f6573206e6f74206d6174636820737570706c696564206465" & + "706f7369745f646174615f726f6f744465706f736974436f6e74726163743a20" & + "696e76616c6964207769746864726177616c5f63726564656e7469616c73206c" & + "656e6774684465706f736974436f6e74726163743a206465706f736974207661" & + "6c7565206e6f74206d756c7469706c65206f6620677765694465706f73697443" & + "6f6e74726163743a20696e76616c6964207075626b6579206c656e6774684465" & + "706f736974436f6e74726163743a206465706f7369742076616c756520746f6f" & + "20686967684465706f736974436f6e74726163743a206465706f736974207661" & + "6c756520746f6f206c6f774465706f736974436f6e74726163743a20696e7661" & + "6c6964207369676e6174757265206c656e677468a2646970667358221220dcec" & + "a8706b29e917dacf25fceef95acac8d90d765ac926663ce4096195952b616473" & + "6f6c634300060b0033" diff --git a/tests/test_deposit_contract.nim b/tests/test_deposit_contract.nim index c8447c7..53216f8 100644 --- a/tests/test_deposit_contract.nim +++ b/tests/test_deposit_contract.nim @@ -2,16 +2,13 @@ import pkg/unittest2 import ../web3 import chronos, nimcrypto, options, json, stint import test_utils +import ./depositcontract contract(DepositContract): proc deposit(pubkey: Bytes48, withdrawalCredentials: Bytes32, signature: Bytes96, deposit_data_root: FixedBytes[32]) proc get_deposit_root(): FixedBytes[32] proc DepositEvent(pubkey: Bytes48, withdrawalCredentials: Bytes32, amount: Bytes8, signature: Bytes96, merkleTreeIndex: Bytes8) {.event.} -const contractCode = 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- -var contractAddress = Address.fromHex("e9d8d67ec115e8345606b3ab59fc71cec46761e4") - suite "Deposit contract": test "deposits": @@ -20,8 +17,8 @@ suite "Deposit contract": let accounts = await web3.provider.eth_accounts() web3.defaultAccount = accounts[0] - let receipt = await web3.deployContract(contractCode) - contractAddress = receipt.contractAddress.get + let receipt = await web3.deployContract(DepositContractCode) + let contractAddress = receipt.contractAddress.get echo "Deployed Deposit contract: ", contractAddress var ns = web3.contractSender(DepositContract, contractAddress)