{"matchId":"2115","creationMatch":"exact_match","runtimeMatch":"exact_match","verifiedAt":"2024-08-08T10:05:44Z","deployment":{"transactionHash":"0xe75fb554e433e03763a1560646ee22dcb74e5274b34c5ad644e7c0f619a7e1d0","blockNumber":"11052984","transactionIndex":"2","deployer":"0xb20a608c624Ca5003905aA834De7156C68b2E1d0"},"sources":{"deposit_contract.sol":{"content":"// ┏━━━┓━┏┓━┏┓━━┏━━━┓━━┏━━━┓━━━━┏━━━┓━━━━━━━━━━━━━━━━━━━┏┓━━━━━┏━━━┓━━━━━━━━━┏┓━━━━━━━━━━━━━━┏┓━\n// ┃┏━━┛┏┛┗┓┃┃━━┃┏━┓┃━━┃┏━┓┃━━━━┗┓┏┓┃━━━━━━━━━━━━━━━━━━┏┛┗┓━━━━┃┏━┓┃━━━━━━━━┏┛┗┓━━━━━━━━━━━━┏┛┗┓\n// ┃┗━━┓┗┓┏┛┃┗━┓┗┛┏┛┃━━┃┃━┃┃━━━━━┃┃┃┃┏━━┓┏━━┓┏━━┓┏━━┓┏┓┗┓┏┛━━━━┃┃━┗┛┏━━┓┏━┓━┗┓┏┛┏━┓┏━━┓━┏━━┓┗┓┏┛\n// ┃┏━━┛━┃┃━┃┏┓┃┏━┛┏┛━━┃┃━┃┃━━━━━┃┃┃┃┃┏┓┃┃┏┓┃┃┏┓┃┃━━┫┣┫━┃┃━━━━━┃┃━┏┓┃┏┓┃┃┏┓┓━┃┃━┃┏┛┗━┓┃━┃┏━┛━┃┃━\n// ┃┗━━┓━┃┗┓┃┃┃┃┃┃┗━┓┏┓┃┗━┛┃━━━━┏┛┗┛┃┃┃━┫┃┗┛┃┃┗┛┃┣━━┃┃┃━┃┗┓━━━━┃┗━┛┃┃┗┛┃┃┃┃┃━┃┗┓┃┃━┃┗┛┗┓┃┗━┓━┃┗┓\n// ┗━━━┛━┗━┛┗┛┗┛┗━━━┛┗┛┗━━━┛━━━━┗━━━┛┗━━┛┃┏━┛┗━━┛┗━━┛┗┛━┗━┛━━━━┗━━━┛┗━━┛┗┛┗┛━┗━┛┗┛━┗━━━┛┗━━┛━┗━┛\n// ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┃┃━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━\n// ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┗┛━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━\n\n// SPDX-License-Identifier: CC0-1.0\n\npragma solidity 0.6.11;\n\n// This interface is designed to be compatible with the Vyper version.\n/// @notice This is the Ethereum 2.0 deposit contract interface.\n/// For more information see the Phase 0 specification under https://github.com/ethereum/eth2.0-specs\ninterface IDepositContract {\n /// @notice A processed deposit event.\n event DepositEvent(\n bytes pubkey,\n bytes withdrawal_credentials,\n bytes amount,\n bytes signature,\n bytes index\n );\n\n /// @notice Submit a Phase 0 DepositData object.\n /// @param pubkey A BLS12-381 public key.\n /// @param withdrawal_credentials Commitment to a public key for withdrawals.\n /// @param signature A BLS12-381 signature.\n /// @param deposit_data_root The SHA-256 hash of the SSZ-encoded DepositData object.\n /// Used as a protection against malformed input.\n function deposit(\n bytes calldata pubkey,\n bytes calldata withdrawal_credentials,\n bytes calldata signature,\n bytes32 deposit_data_root\n ) external payable;\n\n /// @notice Query the current deposit root hash.\n /// @return The deposit root hash.\n function get_deposit_root() external view returns (bytes32);\n\n /// @notice Query the current deposit count.\n /// @return The deposit count encoded as a little endian 64-bit number.\n function get_deposit_count() external view returns (bytes memory);\n}\n\n// Based on official specification in https://eips.ethereum.org/EIPS/eip-165\ninterface ERC165 {\n /// @notice Query if a contract implements an interface\n /// @param interfaceId The interface identifier, as specified in ERC-165\n /// @dev Interface identification is specified in ERC-165. This function\n /// uses less than 30,000 gas.\n /// @return `true` if the contract implements `interfaceId` and\n /// `interfaceId` is not 0xffffffff, `false` otherwise\n function supportsInterface(bytes4 interfaceId) external pure returns (bool);\n}\n\n// This is a rewrite of the Vyper Eth2.0 deposit contract in Solidity.\n// It tries to stay as close as possible to the original source code.\n/// @notice This is the Ethereum 2.0 deposit contract interface.\n/// For more information see the Phase 0 specification under https://github.com/ethereum/eth2.0-specs\ncontract DepositContract is IDepositContract, ERC165 {\n uint constant DEPOSIT_CONTRACT_TREE_DEPTH = 32;\n // NOTE: this also ensures `deposit_count` will fit into 64-bits\n uint constant MAX_DEPOSIT_COUNT = 2**DEPOSIT_CONTRACT_TREE_DEPTH - 1;\n\n bytes32[DEPOSIT_CONTRACT_TREE_DEPTH] branch;\n uint256 deposit_count;\n\n bytes32[DEPOSIT_CONTRACT_TREE_DEPTH] zero_hashes;\n\n constructor() public {\n // Compute hashes in empty sparse Merkle tree\n for (uint height = 0; height < DEPOSIT_CONTRACT_TREE_DEPTH - 1; height++)\n zero_hashes[height + 1] = sha256(abi.encodePacked(zero_hashes[height], zero_hashes[height]));\n }\n\n function get_deposit_root() override external view returns (bytes32) {\n bytes32 node;\n uint size = deposit_count;\n for (uint height = 0; height < DEPOSIT_CONTRACT_TREE_DEPTH; height++) {\n if ((size & 1) == 1)\n node = sha256(abi.encodePacked(branch[height], node));\n else\n node = sha256(abi.encodePacked(node, zero_hashes[height]));\n size /= 2;\n }\n return sha256(abi.encodePacked(\n node,\n to_little_endian_64(uint64(deposit_count)),\n bytes24(0)\n ));\n }\n\n function get_deposit_count() override external view returns (bytes memory) {\n return to_little_endian_64(uint64(deposit_count));\n }\n\n function deposit(\n bytes calldata pubkey,\n bytes calldata withdrawal_credentials,\n bytes calldata signature,\n bytes32 deposit_data_root\n ) override external payable {\n // Extended ABI length checks since dynamic types are used.\n require(pubkey.length == 48, \"DepositContract: invalid pubkey length\");\n require(withdrawal_credentials.length == 32, \"DepositContract: invalid withdrawal_credentials length\");\n require(signature.length == 96, \"DepositContract: invalid signature length\");\n\n // Check deposit amount\n require(msg.value >= 1 ether, \"DepositContract: deposit value too low\");\n require(msg.value % 1 gwei == 0, \"DepositContract: deposit value not multiple of gwei\");\n uint deposit_amount = msg.value / 1 gwei;\n require(deposit_amount <= type(uint64).max, \"DepositContract: deposit value too high\");\n\n // Emit `DepositEvent` log\n bytes memory amount = to_little_endian_64(uint64(deposit_amount));\n emit DepositEvent(\n pubkey,\n withdrawal_credentials,\n amount,\n signature,\n to_little_endian_64(uint64(deposit_count))\n );\n\n // Compute deposit data root (`DepositData` hash tree root)\n bytes32 pubkey_root = sha256(abi.encodePacked(pubkey, bytes16(0)));\n bytes32 signature_root = sha256(abi.encodePacked(\n sha256(abi.encodePacked(signature[:64])),\n sha256(abi.encodePacked(signature[64:], bytes32(0)))\n ));\n bytes32 node = sha256(abi.encodePacked(\n sha256(abi.encodePacked(pubkey_root, withdrawal_credentials)),\n sha256(abi.encodePacked(amount, bytes24(0), signature_root))\n ));\n\n // Verify computed and expected deposit data roots match\n require(node == deposit_data_root, \"DepositContract: reconstructed DepositData does not match supplied deposit_data_root\");\n\n // Avoid overflowing the Merkle tree (and prevent edge case in computing `branch`)\n require(deposit_count < MAX_DEPOSIT_COUNT, \"DepositContract: merkle tree full\");\n\n // Add deposit data root to Merkle tree (update a single `branch` node)\n deposit_count += 1;\n uint size = deposit_count;\n for (uint height = 0; height < DEPOSIT_CONTRACT_TREE_DEPTH; height++) {\n if ((size & 1) == 1) {\n branch[height] = node;\n return;\n }\n node = sha256(abi.encodePacked(branch[height], node));\n size /= 2;\n }\n // As the loop should always end prematurely with the `return` statement,\n // this code should be unreachable. We assert `false` just to be safe.\n assert(false);\n }\n\n function supportsInterface(bytes4 interfaceId) override external pure returns (bool) {\n return interfaceId == type(ERC165).interfaceId || interfaceId == type(IDepositContract).interfaceId;\n }\n\n function to_little_endian_64(uint64 value) internal pure returns (bytes memory ret) {\n ret = new bytes(8);\n bytes8 bytesValue = bytes8(value);\n // Byteswapping during copying to bytes.\n ret[0] = bytesValue[7];\n ret[1] = bytesValue[6];\n ret[2] = bytesValue[5];\n ret[3] = bytesValue[4];\n ret[4] = bytesValue[3];\n ret[5] = bytesValue[2];\n ret[6] = bytesValue[1];\n ret[7] = bytesValue[0];\n }\n}\n"}},"abi":[{"type":"constructor","inputs":[],"stateMutability":"nonpayable"},{"name":"DepositEvent","type":"event","inputs":[{"name":"pubkey","type":"bytes","indexed":false,"internalType":"bytes"},{"name":"withdrawal_credentials","type":"bytes","indexed":false,"internalType":"bytes"},{"name":"amount","type":"bytes","indexed":false,"internalType":"bytes"},{"name":"signature","type":"bytes","indexed":false,"internalType":"bytes"},{"name":"index","type":"bytes","indexed":false,"internalType":"bytes"}],"anonymous":false},{"name":"deposit","type":"function","inputs":[{"name":"pubkey","type":"bytes","internalType":"bytes"},{"name":"withdrawal_credentials","type":"bytes","internalType":"bytes"},{"name":"signature","type":"bytes","internalType":"bytes"},{"name":"deposit_data_root","type":"bytes32","internalType":"bytes32"}],"outputs":[],"stateMutability":"payable"},{"name":"get_deposit_count","type":"function","inputs":[],"outputs":[{"name":"","type":"bytes","internalType":"bytes"}],"stateMutability":"view"},{"name":"get_deposit_root","type":"function","inputs":[],"outputs":[{"name":"","type":"bytes32","internalType":"bytes32"}],"stateMutability":"view"},{"name":"supportsInterface","type":"function","inputs":[{"name":"interfaceId","type":"bytes4","internalType":"bytes4"}],"outputs":[{"name":"","type":"bool","internalType":"bool"}],"stateMutability":"pure"}],"metadata":{"compiler":{"version":"0.6.11+commit.5ef660b1"},"language":"Solidity","output":{"abi":[{"inputs":[],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"bytes","name":"pubkey","type":"bytes"},{"indexed":false,"internalType":"bytes","name":"withdrawal_credentials","type":"bytes"},{"indexed":false,"internalType":"bytes","name":"amount","type":"bytes"},{"indexed":false,"internalType":"bytes","name":"signature","type":"bytes"},{"indexed":false,"internalType":"bytes","name":"index","type":"bytes"}],"name":"DepositEvent","type":"event"},{"inputs":[{"internalType":"bytes","name":"pubkey","type":"bytes"},{"internalType":"bytes","name":"withdrawal_credentials","type":"bytes"},{"internalType":"bytes","name":"signature","type":"bytes"},{"internalType":"bytes32","name":"deposit_data_root","type":"bytes32"}],"name":"deposit","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[],"name":"get_deposit_count","outputs":[{"internalType":"bytes","name":"","type":"bytes"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"get_deposit_root","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes4","name":"interfaceId","type":"bytes4"}],"name":"supportsInterface","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"pure","type":"function"}],"devdoc":{"kind":"dev","methods":{"deposit(bytes,bytes,bytes,bytes32)":{"params":{"deposit_data_root":"The SHA-256 hash of the SSZ-encoded DepositData object. Used as a protection against malformed input.","pubkey":"A BLS12-381 public key.","signature":"A BLS12-381 signature.","withdrawal_credentials":"Commitment to a public key for withdrawals."}},"get_deposit_count()":{"returns":{"_0":"The deposit count encoded as a little endian 64-bit number."}},"get_deposit_root()":{"returns":{"_0":"The deposit root hash."}},"supportsInterface(bytes4)":{"details":"Interface identification is specified in ERC-165. This function uses less than 30,000 gas.","params":{"interfaceId":"The interface identifier, as specified in ERC-165"},"returns":{"_0":"`true` if the contract implements `interfaceId` and `interfaceId` is not 0xffffffff, `false` otherwise"}}},"version":1},"userdoc":{"events":{"DepositEvent(bytes,bytes,bytes,bytes,bytes)":{"notice":"A processed deposit event."}},"kind":"user","methods":{"deposit(bytes,bytes,bytes,bytes32)":{"notice":"Submit a Phase 0 DepositData object."},"get_deposit_count()":{"notice":"Query the current deposit count."},"get_deposit_root()":{"notice":"Query the current deposit root hash."},"supportsInterface(bytes4)":{"notice":"Query if a contract implements an interface"}},"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","version":1}},"settings":{"compilationTarget":{"deposit_contract.sol":"DepositContract"},"evmVersion":"istanbul","libraries":{},"metadata":{"bytecodeHash":"ipfs","useLiteralContent":true},"optimizer":{"enabled":true,"runs":5000000},"remappings":[]},"sources":{"deposit_contract.sol":{"content":"// ┏━━━┓━┏┓━┏┓━━┏━━━┓━━┏━━━┓━━━━┏━━━┓━━━━━━━━━━━━━━━━━━━┏┓━━━━━┏━━━┓━━━━━━━━━┏┓━━━━━━━━━━━━━━┏┓━\n// ┃┏━━┛┏┛┗┓┃┃━━┃┏━┓┃━━┃┏━┓┃━━━━┗┓┏┓┃━━━━━━━━━━━━━━━━━━┏┛┗┓━━━━┃┏━┓┃━━━━━━━━┏┛┗┓━━━━━━━━━━━━┏┛┗┓\n// ┃┗━━┓┗┓┏┛┃┗━┓┗┛┏┛┃━━┃┃━┃┃━━━━━┃┃┃┃┏━━┓┏━━┓┏━━┓┏━━┓┏┓┗┓┏┛━━━━┃┃━┗┛┏━━┓┏━┓━┗┓┏┛┏━┓┏━━┓━┏━━┓┗┓┏┛\n// ┃┏━━┛━┃┃━┃┏┓┃┏━┛┏┛━━┃┃━┃┃━━━━━┃┃┃┃┃┏┓┃┃┏┓┃┃┏┓┃┃━━┫┣┫━┃┃━━━━━┃┃━┏┓┃┏┓┃┃┏┓┓━┃┃━┃┏┛┗━┓┃━┃┏━┛━┃┃━\n// ┃┗━━┓━┃┗┓┃┃┃┃┃┃┗━┓┏┓┃┗━┛┃━━━━┏┛┗┛┃┃┃━┫┃┗┛┃┃┗┛┃┣━━┃┃┃━┃┗┓━━━━┃┗━┛┃┃┗┛┃┃┃┃┃━┃┗┓┃┃━┃┗┛┗┓┃┗━┓━┃┗┓\n// ┗━━━┛━┗━┛┗┛┗┛┗━━━┛┗┛┗━━━┛━━━━┗━━━┛┗━━┛┃┏━┛┗━━┛┗━━┛┗┛━┗━┛━━━━┗━━━┛┗━━┛┗┛┗┛━┗━┛┗┛━┗━━━┛┗━━┛━┗━┛\n// ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┃┃━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━\n// ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┗┛━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━\n\n// SPDX-License-Identifier: CC0-1.0\n\npragma solidity 0.6.11;\n\n// This interface is designed to be compatible with the Vyper version.\n/// @notice This is the Ethereum 2.0 deposit contract interface.\n/// For more information see the Phase 0 specification under https://github.com/ethereum/eth2.0-specs\ninterface IDepositContract {\n /// @notice A processed deposit event.\n event DepositEvent(\n bytes pubkey,\n bytes withdrawal_credentials,\n bytes amount,\n bytes signature,\n bytes index\n );\n\n /// @notice Submit a Phase 0 DepositData object.\n /// @param pubkey A BLS12-381 public key.\n /// @param withdrawal_credentials Commitment to a public key for withdrawals.\n /// @param signature A BLS12-381 signature.\n /// @param deposit_data_root The SHA-256 hash of the SSZ-encoded DepositData object.\n /// Used as a protection against malformed input.\n function deposit(\n bytes calldata pubkey,\n bytes calldata withdrawal_credentials,\n bytes calldata signature,\n bytes32 deposit_data_root\n ) external payable;\n\n /// @notice Query the current deposit root hash.\n /// @return The deposit root hash.\n function get_deposit_root() external view returns (bytes32);\n\n /// @notice Query the current deposit count.\n /// @return The deposit count encoded as a little endian 64-bit number.\n function get_deposit_count() external view returns (bytes memory);\n}\n\n// Based on official specification in https://eips.ethereum.org/EIPS/eip-165\ninterface ERC165 {\n /// @notice Query if a contract implements an interface\n /// @param interfaceId The interface identifier, as specified in ERC-165\n /// @dev Interface identification is specified in ERC-165. This function\n /// uses less than 30,000 gas.\n /// @return `true` if the contract implements `interfaceId` and\n /// `interfaceId` is not 0xffffffff, `false` otherwise\n function supportsInterface(bytes4 interfaceId) external pure returns (bool);\n}\n\n// This is a rewrite of the Vyper Eth2.0 deposit contract in Solidity.\n// It tries to stay as close as possible to the original source code.\n/// @notice This is the Ethereum 2.0 deposit contract interface.\n/// For more information see the Phase 0 specification under https://github.com/ethereum/eth2.0-specs\ncontract DepositContract is IDepositContract, ERC165 {\n uint constant DEPOSIT_CONTRACT_TREE_DEPTH = 32;\n // NOTE: this also ensures `deposit_count` will fit into 64-bits\n uint constant MAX_DEPOSIT_COUNT = 2**DEPOSIT_CONTRACT_TREE_DEPTH - 1;\n\n bytes32[DEPOSIT_CONTRACT_TREE_DEPTH] branch;\n uint256 deposit_count;\n\n bytes32[DEPOSIT_CONTRACT_TREE_DEPTH] zero_hashes;\n\n constructor() public {\n // Compute hashes in empty sparse Merkle tree\n for (uint height = 0; height < DEPOSIT_CONTRACT_TREE_DEPTH - 1; height++)\n zero_hashes[height + 1] = sha256(abi.encodePacked(zero_hashes[height], zero_hashes[height]));\n }\n\n function get_deposit_root() override external view returns (bytes32) {\n bytes32 node;\n uint size = deposit_count;\n for (uint height = 0; height < DEPOSIT_CONTRACT_TREE_DEPTH; height++) {\n if ((size & 1) == 1)\n node = sha256(abi.encodePacked(branch[height], node));\n else\n node = sha256(abi.encodePacked(node, zero_hashes[height]));\n size /= 2;\n }\n return sha256(abi.encodePacked(\n node,\n to_little_endian_64(uint64(deposit_count)),\n bytes24(0)\n ));\n }\n\n function get_deposit_count() override external view returns (bytes memory) {\n return to_little_endian_64(uint64(deposit_count));\n }\n\n function deposit(\n bytes calldata pubkey,\n bytes calldata withdrawal_credentials,\n bytes calldata signature,\n bytes32 deposit_data_root\n ) override external payable {\n // Extended ABI length checks since dynamic types are used.\n require(pubkey.length == 48, \"DepositContract: invalid pubkey length\");\n require(withdrawal_credentials.length == 32, \"DepositContract: invalid withdrawal_credentials length\");\n require(signature.length == 96, \"DepositContract: invalid signature length\");\n\n // Check deposit amount\n require(msg.value >= 1 ether, \"DepositContract: deposit value too low\");\n require(msg.value % 1 gwei == 0, \"DepositContract: deposit value not multiple of gwei\");\n uint deposit_amount = msg.value / 1 gwei;\n require(deposit_amount <= type(uint64).max, \"DepositContract: deposit value too high\");\n\n // Emit `DepositEvent` log\n bytes memory amount = to_little_endian_64(uint64(deposit_amount));\n emit DepositEvent(\n pubkey,\n withdrawal_credentials,\n amount,\n signature,\n to_little_endian_64(uint64(deposit_count))\n );\n\n // Compute deposit data root (`DepositData` hash tree root)\n bytes32 pubkey_root = sha256(abi.encodePacked(pubkey, bytes16(0)));\n bytes32 signature_root = sha256(abi.encodePacked(\n sha256(abi.encodePacked(signature[:64])),\n sha256(abi.encodePacked(signature[64:], bytes32(0)))\n ));\n bytes32 node = sha256(abi.encodePacked(\n sha256(abi.encodePacked(pubkey_root, withdrawal_credentials)),\n sha256(abi.encodePacked(amount, bytes24(0), signature_root))\n ));\n\n // Verify computed and expected deposit data roots match\n require(node == deposit_data_root, \"DepositContract: reconstructed DepositData does not match supplied deposit_data_root\");\n\n // Avoid overflowing the Merkle tree (and prevent edge case in computing `branch`)\n require(deposit_count < MAX_DEPOSIT_COUNT, \"DepositContract: merkle tree full\");\n\n // Add deposit data root to Merkle tree (update a single `branch` node)\n deposit_count += 1;\n uint size = deposit_count;\n for (uint height = 0; height < DEPOSIT_CONTRACT_TREE_DEPTH; height++) {\n if ((size & 1) == 1) {\n branch[height] = node;\n return;\n }\n node = sha256(abi.encodePacked(branch[height], node));\n size /= 2;\n }\n // As the loop should always end prematurely with the `return` statement,\n // this code should be unreachable. We assert `false` just to be safe.\n assert(false);\n }\n\n function supportsInterface(bytes4 interfaceId) override external pure returns (bool) {\n return interfaceId == type(ERC165).interfaceId || interfaceId == type(IDepositContract).interfaceId;\n }\n\n function to_little_endian_64(uint64 value) internal pure returns (bytes memory ret) {\n ret = new bytes(8);\n bytes8 bytesValue = bytes8(value);\n // Byteswapping during copying to bytes.\n ret[0] = bytesValue[7];\n ret[1] = bytesValue[6];\n ret[2] = bytesValue[5];\n ret[3] = bytesValue[4];\n ret[4] = bytesValue[3];\n ret[5] = bytesValue[2];\n ret[6] = bytesValue[1];\n ret[7] = bytesValue[0];\n }\n}\n","keccak256":"0xeb4884395e470268e1ff14dca32e7a030425557a23cb16013c4d25914fd1e4a1","license":"CC0-1.0"}},"version":1},"storageLayout":{"types":{"t_bytes32":{"label":"bytes32","encoding":"inplace","numberOfBytes":"32"},"t_uint256":{"label":"uint256","encoding":"inplace","numberOfBytes":"32"},"t_array(t_bytes32)32_storage":{"base":"t_bytes32","label":"bytes32[32]","encoding":"inplace","numberOfBytes":"1024"}},"storage":[{"slot":"0","type":"t_array(t_bytes32)32_storage","astId":68,"label":"branch","offset":0,"contract":"deposit_contract.sol:DepositContract"},{"slot":"32","type":"t_uint256","astId":70,"label":"deposit_count","offset":0,"contract":"deposit_contract.sol:DepositContract"},{"slot":"33","type":"t_array(t_bytes32)32_storage","astId":74,"label":"zero_hashes","offset":0,"contract":"deposit_contract.sol:DepositContract"}]},"transientStorageLayout":null,"userdoc":{"kind":"user","events":{"DepositEvent(bytes,bytes,bytes,bytes,bytes)":{"notice":"A processed deposit event."}},"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","methods":{"get_deposit_root()":{"notice":"Query the current deposit root hash."},"get_deposit_count()":{"notice":"Query the current deposit count."},"supportsInterface(bytes4)":{"notice":"Query if a contract implements an interface"},"deposit(bytes,bytes,bytes,bytes32)":{"notice":"Submit a Phase 0 DepositData object."}},"version":1},"devdoc":{"kind":"dev","methods":{"get_deposit_root()":{"returns":{"_0":"The deposit root hash."}},"get_deposit_count()":{"returns":{"_0":"The deposit count encoded as a little endian 64-bit number."}},"supportsInterface(bytes4)":{"params":{"interfaceId":"The interface identifier, as specified in ERC-165"},"details":"Interface identification is specified in ERC-165. This function uses less than 30,000 gas.","returns":{"_0":"`true` if the contract implements `interfaceId` and `interfaceId` is not 0xffffffff, `false` otherwise"}},"deposit(bytes,bytes,bytes,bytes32)":{"params":{"pubkey":"A BLS12-381 public key.","signature":"A BLS12-381 signature.","deposit_data_root":"The SHA-256 hash of the SSZ-encoded DepositData object. Used as a protection against malformed input.","withdrawal_credentials":"Commitment to a public key for withdrawals."}}},"version":1},"sourceIds":{"deposit_contract.sol":{"id":0}},"stdJsonInput":{"language":"Solidity","sources":{"deposit_contract.sol":{"content":"// ┏━━━┓━┏┓━┏┓━━┏━━━┓━━┏━━━┓━━━━┏━━━┓━━━━━━━━━━━━━━━━━━━┏┓━━━━━┏━━━┓━━━━━━━━━┏┓━━━━━━━━━━━━━━┏┓━\n// ┃┏━━┛┏┛┗┓┃┃━━┃┏━┓┃━━┃┏━┓┃━━━━┗┓┏┓┃━━━━━━━━━━━━━━━━━━┏┛┗┓━━━━┃┏━┓┃━━━━━━━━┏┛┗┓━━━━━━━━━━━━┏┛┗┓\n// ┃┗━━┓┗┓┏┛┃┗━┓┗┛┏┛┃━━┃┃━┃┃━━━━━┃┃┃┃┏━━┓┏━━┓┏━━┓┏━━┓┏┓┗┓┏┛━━━━┃┃━┗┛┏━━┓┏━┓━┗┓┏┛┏━┓┏━━┓━┏━━┓┗┓┏┛\n// ┃┏━━┛━┃┃━┃┏┓┃┏━┛┏┛━━┃┃━┃┃━━━━━┃┃┃┃┃┏┓┃┃┏┓┃┃┏┓┃┃━━┫┣┫━┃┃━━━━━┃┃━┏┓┃┏┓┃┃┏┓┓━┃┃━┃┏┛┗━┓┃━┃┏━┛━┃┃━\n// ┃┗━━┓━┃┗┓┃┃┃┃┃┃┗━┓┏┓┃┗━┛┃━━━━┏┛┗┛┃┃┃━┫┃┗┛┃┃┗┛┃┣━━┃┃┃━┃┗┓━━━━┃┗━┛┃┃┗┛┃┃┃┃┃━┃┗┓┃┃━┃┗┛┗┓┃┗━┓━┃┗┓\n// ┗━━━┛━┗━┛┗┛┗┛┗━━━┛┗┛┗━━━┛━━━━┗━━━┛┗━━┛┃┏━┛┗━━┛┗━━┛┗┛━┗━┛━━━━┗━━━┛┗━━┛┗┛┗┛━┗━┛┗┛━┗━━━┛┗━━┛━┗━┛\n// ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┃┃━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━\n// ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┗┛━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━\n\n// SPDX-License-Identifier: CC0-1.0\n\npragma solidity 0.6.11;\n\n// This interface is designed to be compatible with the Vyper version.\n/// @notice This is the Ethereum 2.0 deposit contract interface.\n/// For more information see the Phase 0 specification under https://github.com/ethereum/eth2.0-specs\ninterface IDepositContract {\n /// @notice A processed deposit event.\n event DepositEvent(\n bytes pubkey,\n bytes withdrawal_credentials,\n bytes amount,\n bytes signature,\n bytes index\n );\n\n /// @notice Submit a Phase 0 DepositData object.\n /// @param pubkey A BLS12-381 public key.\n /// @param withdrawal_credentials Commitment to a public key for withdrawals.\n /// @param signature A BLS12-381 signature.\n /// @param deposit_data_root The SHA-256 hash of the SSZ-encoded DepositData object.\n /// Used as a protection against malformed input.\n function deposit(\n bytes calldata pubkey,\n bytes calldata withdrawal_credentials,\n bytes calldata signature,\n bytes32 deposit_data_root\n ) external payable;\n\n /// @notice Query the current deposit root hash.\n /// @return The deposit root hash.\n function get_deposit_root() external view returns (bytes32);\n\n /// @notice Query the current deposit count.\n /// @return The deposit count encoded as a little endian 64-bit number.\n function get_deposit_count() external view returns (bytes memory);\n}\n\n// Based on official specification in https://eips.ethereum.org/EIPS/eip-165\ninterface ERC165 {\n /// @notice Query if a contract implements an interface\n /// @param interfaceId The interface identifier, as specified in ERC-165\n /// @dev Interface identification is specified in ERC-165. This function\n /// uses less than 30,000 gas.\n /// @return `true` if the contract implements `interfaceId` and\n /// `interfaceId` is not 0xffffffff, `false` otherwise\n function supportsInterface(bytes4 interfaceId) external pure returns (bool);\n}\n\n// This is a rewrite of the Vyper Eth2.0 deposit contract in Solidity.\n// It tries to stay as close as possible to the original source code.\n/// @notice This is the Ethereum 2.0 deposit contract interface.\n/// For more information see the Phase 0 specification under https://github.com/ethereum/eth2.0-specs\ncontract DepositContract is IDepositContract, ERC165 {\n uint constant DEPOSIT_CONTRACT_TREE_DEPTH = 32;\n // NOTE: this also ensures `deposit_count` will fit into 64-bits\n uint constant MAX_DEPOSIT_COUNT = 2**DEPOSIT_CONTRACT_TREE_DEPTH - 1;\n\n bytes32[DEPOSIT_CONTRACT_TREE_DEPTH] branch;\n uint256 deposit_count;\n\n bytes32[DEPOSIT_CONTRACT_TREE_DEPTH] zero_hashes;\n\n constructor() public {\n // Compute hashes in empty sparse Merkle tree\n for (uint height = 0; height < DEPOSIT_CONTRACT_TREE_DEPTH - 1; height++)\n zero_hashes[height + 1] = sha256(abi.encodePacked(zero_hashes[height], zero_hashes[height]));\n }\n\n function get_deposit_root() override external view returns (bytes32) {\n bytes32 node;\n uint size = deposit_count;\n for (uint height = 0; height < DEPOSIT_CONTRACT_TREE_DEPTH; height++) {\n if ((size & 1) == 1)\n node = sha256(abi.encodePacked(branch[height], node));\n else\n node = sha256(abi.encodePacked(node, zero_hashes[height]));\n size /= 2;\n }\n return sha256(abi.encodePacked(\n node,\n to_little_endian_64(uint64(deposit_count)),\n bytes24(0)\n ));\n }\n\n function get_deposit_count() override external view returns (bytes memory) {\n return to_little_endian_64(uint64(deposit_count));\n }\n\n function deposit(\n bytes calldata pubkey,\n bytes calldata withdrawal_credentials,\n bytes calldata signature,\n bytes32 deposit_data_root\n ) override external payable {\n // Extended ABI length checks since dynamic types are used.\n require(pubkey.length == 48, \"DepositContract: invalid pubkey length\");\n require(withdrawal_credentials.length == 32, \"DepositContract: invalid withdrawal_credentials length\");\n require(signature.length == 96, \"DepositContract: invalid signature length\");\n\n // Check deposit amount\n require(msg.value >= 1 ether, \"DepositContract: deposit value too low\");\n require(msg.value % 1 gwei == 0, \"DepositContract: deposit value not multiple of gwei\");\n uint deposit_amount = msg.value / 1 gwei;\n require(deposit_amount <= type(uint64).max, \"DepositContract: deposit value too high\");\n\n // Emit `DepositEvent` log\n bytes memory amount = to_little_endian_64(uint64(deposit_amount));\n emit DepositEvent(\n pubkey,\n withdrawal_credentials,\n amount,\n signature,\n to_little_endian_64(uint64(deposit_count))\n );\n\n // Compute deposit data root (`DepositData` hash tree root)\n bytes32 pubkey_root = sha256(abi.encodePacked(pubkey, bytes16(0)));\n bytes32 signature_root = sha256(abi.encodePacked(\n sha256(abi.encodePacked(signature[:64])),\n sha256(abi.encodePacked(signature[64:], bytes32(0)))\n ));\n bytes32 node = sha256(abi.encodePacked(\n sha256(abi.encodePacked(pubkey_root, withdrawal_credentials)),\n sha256(abi.encodePacked(amount, bytes24(0), signature_root))\n ));\n\n // Verify computed and expected deposit data roots match\n require(node == deposit_data_root, \"DepositContract: reconstructed DepositData does not match supplied deposit_data_root\");\n\n // Avoid overflowing the Merkle tree (and prevent edge case in computing `branch`)\n require(deposit_count < MAX_DEPOSIT_COUNT, \"DepositContract: merkle tree full\");\n\n // Add deposit data root to Merkle tree (update a single `branch` node)\n deposit_count += 1;\n uint size = deposit_count;\n for (uint height = 0; height < DEPOSIT_CONTRACT_TREE_DEPTH; height++) {\n if ((size & 1) == 1) {\n branch[height] = node;\n return;\n }\n node = sha256(abi.encodePacked(branch[height], node));\n size /= 2;\n }\n // As the loop should always end prematurely with the `return` statement,\n // this code should be unreachable. We assert `false` just to be safe.\n assert(false);\n }\n\n function supportsInterface(bytes4 interfaceId) override external pure returns (bool) {\n return interfaceId == type(ERC165).interfaceId || interfaceId == type(IDepositContract).interfaceId;\n }\n\n function to_little_endian_64(uint64 value) internal pure returns (bytes memory ret) {\n ret = new bytes(8);\n bytes8 bytesValue = bytes8(value);\n // Byteswapping during copying to bytes.\n ret[0] = bytesValue[7];\n ret[1] = bytesValue[6];\n ret[2] = bytesValue[5];\n ret[3] = bytesValue[4];\n ret[4] = bytesValue[3];\n ret[5] = bytesValue[2];\n ret[6] = bytesValue[1];\n ret[7] = bytesValue[0];\n }\n}\n"}},"settings":{"metadata":{"bytecodeHash":"ipfs","useLiteralContent":true},"libraries":{},"optimizer":{"runs":5000000,"enabled":true},"evmVersion":"istanbul","remappings":[]}},"stdJsonOutput":{"sources":{"deposit_contract.sol":{"id":0}},"contracts":{"deposit_contract.sol":{"DepositContract":{"abi":[{"type":"constructor","inputs":[],"stateMutability":"nonpayable"},{"name":"DepositEvent","type":"event","inputs":[{"name":"pubkey","type":"bytes","indexed":false,"internalType":"bytes"},{"name":"withdrawal_credentials","type":"bytes","indexed":false,"internalType":"bytes"},{"name":"amount","type":"bytes","indexed":false,"internalType":"bytes"},{"name":"signature","type":"bytes","indexed":false,"internalType":"bytes"},{"name":"index","type":"bytes","indexed":false,"internalType":"bytes"}],"anonymous":false},{"name":"deposit","type":"function","inputs":[{"name":"pubkey","type":"bytes","internalType":"bytes"},{"name":"withdrawal_credentials","type":"bytes","internalType":"bytes"},{"name":"signature","type":"bytes","internalType":"bytes"},{"name":"deposit_data_root","type":"bytes32","internalType":"bytes32"}],"outputs":[],"stateMutability":"payable"},{"name":"get_deposit_count","type":"function","inputs":[],"outputs":[{"name":"","type":"bytes","internalType":"bytes"}],"stateMutability":"view"},{"name":"get_deposit_root","type":"function","inputs":[],"outputs":[{"name":"","type":"bytes32","internalType":"bytes32"}],"stateMutability":"view"},{"name":"supportsInterface","type":"function","inputs":[{"name":"interfaceId","type":"bytes4","internalType":"bytes4"}],"outputs":[{"name":"","type":"bool","internalType":"bool"}],"stateMutability":"pure"}],"metadata":"{\"compiler\":{\"version\":\"0.6.11+commit.5ef660b1\"},\"language\":\"Solidity\",\"output\":{\"abi\":[{\"inputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"constructor\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":false,\"internalType\":\"bytes\",\"name\":\"pubkey\",\"type\":\"bytes\"},{\"indexed\":false,\"internalType\":\"bytes\",\"name\":\"withdrawal_credentials\",\"type\":\"bytes\"},{\"indexed\":false,\"internalType\":\"bytes\",\"name\":\"amount\",\"type\":\"bytes\"},{\"indexed\":false,\"internalType\":\"bytes\",\"name\":\"signature\",\"type\":\"bytes\"},{\"indexed\":false,\"internalType\":\"bytes\",\"name\":\"index\",\"type\":\"bytes\"}],\"name\":\"DepositEvent\",\"type\":\"event\"},{\"inputs\":[{\"internalType\":\"bytes\",\"name\":\"pubkey\",\"type\":\"bytes\"},{\"internalType\":\"bytes\",\"name\":\"withdrawal_credentials\",\"type\":\"bytes\"},{\"internalType\":\"bytes\",\"name\":\"signature\",\"type\":\"bytes\"},{\"internalType\":\"bytes32\",\"name\":\"deposit_data_root\",\"type\":\"bytes32\"}],\"name\":\"deposit\",\"outputs\":[],\"stateMutability\":\"payable\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"get_deposit_count\",\"outputs\":[{\"internalType\":\"bytes\",\"name\":\"\",\"type\":\"bytes\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"get_deposit_root\",\"outputs\":[{\"internalType\":\"bytes32\",\"name\":\"\",\"type\":\"bytes32\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"bytes4\",\"name\":\"interfaceId\",\"type\":\"bytes4\"}],\"name\":\"supportsInterface\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"\",\"type\":\"bool\"}],\"stateMutability\":\"pure\",\"type\":\"function\"}],\"devdoc\":{\"kind\":\"dev\",\"methods\":{\"deposit(bytes,bytes,bytes,bytes32)\":{\"params\":{\"deposit_data_root\":\"The SHA-256 hash of the SSZ-encoded DepositData object. Used as a protection against malformed input.\",\"pubkey\":\"A BLS12-381 public key.\",\"signature\":\"A BLS12-381 signature.\",\"withdrawal_credentials\":\"Commitment to a public key for withdrawals.\"}},\"get_deposit_count()\":{\"returns\":{\"_0\":\"The deposit count encoded as a little endian 64-bit number.\"}},\"get_deposit_root()\":{\"returns\":{\"_0\":\"The deposit root hash.\"}},\"supportsInterface(bytes4)\":{\"details\":\"Interface identification is specified in ERC-165. This function uses less than 30,000 gas.\",\"params\":{\"interfaceId\":\"The interface identifier, as specified in ERC-165\"},\"returns\":{\"_0\":\"`true` if the contract implements `interfaceId` and `interfaceId` is not 0xffffffff, `false` otherwise\"}}},\"version\":1},\"userdoc\":{\"events\":{\"DepositEvent(bytes,bytes,bytes,bytes,bytes)\":{\"notice\":\"A processed deposit event.\"}},\"kind\":\"user\",\"methods\":{\"deposit(bytes,bytes,bytes,bytes32)\":{\"notice\":\"Submit a Phase 0 DepositData object.\"},\"get_deposit_count()\":{\"notice\":\"Query the current deposit count.\"},\"get_deposit_root()\":{\"notice\":\"Query the current deposit root hash.\"},\"supportsInterface(bytes4)\":{\"notice\":\"Query if a contract implements an interface\"}},\"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\",\"version\":1}},\"settings\":{\"compilationTarget\":{\"deposit_contract.sol\":\"DepositContract\"},\"evmVersion\":\"istanbul\",\"libraries\":{},\"metadata\":{\"bytecodeHash\":\"ipfs\",\"useLiteralContent\":true},\"optimizer\":{\"enabled\":true,\"runs\":5000000},\"remappings\":[]},\"sources\":{\"deposit_contract.sol\":{\"content\":\"// ┏━━━┓━┏┓━┏┓━━┏━━━┓━━┏━━━┓━━━━┏━━━┓━━━━━━━━━━━━━━━━━━━┏┓━━━━━┏━━━┓━━━━━━━━━┏┓━━━━━━━━━━━━━━┏┓━\\n// ┃┏━━┛┏┛┗┓┃┃━━┃┏━┓┃━━┃┏━┓┃━━━━┗┓┏┓┃━━━━━━━━━━━━━━━━━━┏┛┗┓━━━━┃┏━┓┃━━━━━━━━┏┛┗┓━━━━━━━━━━━━┏┛┗┓\\n// ┃┗━━┓┗┓┏┛┃┗━┓┗┛┏┛┃━━┃┃━┃┃━━━━━┃┃┃┃┏━━┓┏━━┓┏━━┓┏━━┓┏┓┗┓┏┛━━━━┃┃━┗┛┏━━┓┏━┓━┗┓┏┛┏━┓┏━━┓━┏━━┓┗┓┏┛\\n// ┃┏━━┛━┃┃━┃┏┓┃┏━┛┏┛━━┃┃━┃┃━━━━━┃┃┃┃┃┏┓┃┃┏┓┃┃┏┓┃┃━━┫┣┫━┃┃━━━━━┃┃━┏┓┃┏┓┃┃┏┓┓━┃┃━┃┏┛┗━┓┃━┃┏━┛━┃┃━\\n// ┃┗━━┓━┃┗┓┃┃┃┃┃┃┗━┓┏┓┃┗━┛┃━━━━┏┛┗┛┃┃┃━┫┃┗┛┃┃┗┛┃┣━━┃┃┃━┃┗┓━━━━┃┗━┛┃┃┗┛┃┃┃┃┃━┃┗┓┃┃━┃┗┛┗┓┃┗━┓━┃┗┓\\n// ┗━━━┛━┗━┛┗┛┗┛┗━━━┛┗┛┗━━━┛━━━━┗━━━┛┗━━┛┃┏━┛┗━━┛┗━━┛┗┛━┗━┛━━━━┗━━━┛┗━━┛┗┛┗┛━┗━┛┗┛━┗━━━┛┗━━┛━┗━┛\\n// ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┃┃━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━\\n// ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┗┛━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━\\n\\n// SPDX-License-Identifier: CC0-1.0\\n\\npragma solidity 0.6.11;\\n\\n// This interface is designed to be compatible with the Vyper version.\\n/// @notice This is the Ethereum 2.0 deposit contract interface.\\n/// For more information see the Phase 0 specification under https://github.com/ethereum/eth2.0-specs\\ninterface IDepositContract {\\n /// @notice A processed deposit event.\\n event DepositEvent(\\n bytes pubkey,\\n bytes withdrawal_credentials,\\n bytes amount,\\n bytes signature,\\n bytes index\\n );\\n\\n /// @notice Submit a Phase 0 DepositData object.\\n /// @param pubkey A BLS12-381 public key.\\n /// @param withdrawal_credentials Commitment to a public key for withdrawals.\\n /// @param signature A BLS12-381 signature.\\n /// @param deposit_data_root The SHA-256 hash of the SSZ-encoded DepositData object.\\n /// Used as a protection against malformed input.\\n function deposit(\\n bytes calldata pubkey,\\n bytes calldata withdrawal_credentials,\\n bytes calldata signature,\\n bytes32 deposit_data_root\\n ) external payable;\\n\\n /// @notice Query the current deposit root hash.\\n /// @return The deposit root hash.\\n function get_deposit_root() external view returns (bytes32);\\n\\n /// @notice Query the current deposit count.\\n /// @return The deposit count encoded as a little endian 64-bit number.\\n function get_deposit_count() external view returns (bytes memory);\\n}\\n\\n// Based on official specification in https://eips.ethereum.org/EIPS/eip-165\\ninterface ERC165 {\\n /// @notice Query if a contract implements an interface\\n /// @param interfaceId The interface identifier, as specified in ERC-165\\n /// @dev Interface identification is specified in ERC-165. This function\\n /// uses less than 30,000 gas.\\n /// @return `true` if the contract implements `interfaceId` and\\n /// `interfaceId` is not 0xffffffff, `false` otherwise\\n function supportsInterface(bytes4 interfaceId) external pure returns (bool);\\n}\\n\\n// This is a rewrite of the Vyper Eth2.0 deposit contract in Solidity.\\n// It tries to stay as close as possible to the original source code.\\n/// @notice This is the Ethereum 2.0 deposit contract interface.\\n/// For more information see the Phase 0 specification under https://github.com/ethereum/eth2.0-specs\\ncontract DepositContract is IDepositContract, ERC165 {\\n uint constant DEPOSIT_CONTRACT_TREE_DEPTH = 32;\\n // NOTE: this also ensures `deposit_count` will fit into 64-bits\\n uint constant MAX_DEPOSIT_COUNT = 2**DEPOSIT_CONTRACT_TREE_DEPTH - 1;\\n\\n bytes32[DEPOSIT_CONTRACT_TREE_DEPTH] branch;\\n uint256 deposit_count;\\n\\n bytes32[DEPOSIT_CONTRACT_TREE_DEPTH] zero_hashes;\\n\\n constructor() public {\\n // Compute hashes in empty sparse Merkle tree\\n for (uint height = 0; height < DEPOSIT_CONTRACT_TREE_DEPTH - 1; height++)\\n zero_hashes[height + 1] = sha256(abi.encodePacked(zero_hashes[height], zero_hashes[height]));\\n }\\n\\n function get_deposit_root() override external view returns (bytes32) {\\n bytes32 node;\\n uint size = deposit_count;\\n for (uint height = 0; height < DEPOSIT_CONTRACT_TREE_DEPTH; height++) {\\n if ((size & 1) == 1)\\n node = sha256(abi.encodePacked(branch[height], node));\\n else\\n node = sha256(abi.encodePacked(node, zero_hashes[height]));\\n size /= 2;\\n }\\n return sha256(abi.encodePacked(\\n node,\\n to_little_endian_64(uint64(deposit_count)),\\n bytes24(0)\\n ));\\n }\\n\\n function get_deposit_count() override external view returns (bytes memory) {\\n return to_little_endian_64(uint64(deposit_count));\\n }\\n\\n function deposit(\\n bytes calldata pubkey,\\n bytes calldata withdrawal_credentials,\\n bytes calldata signature,\\n bytes32 deposit_data_root\\n ) override external payable {\\n // Extended ABI length checks since dynamic types are used.\\n require(pubkey.length == 48, \\\"DepositContract: invalid pubkey length\\\");\\n require(withdrawal_credentials.length == 32, \\\"DepositContract: invalid withdrawal_credentials length\\\");\\n require(signature.length == 96, \\\"DepositContract: invalid signature length\\\");\\n\\n // Check deposit amount\\n require(msg.value >= 1 ether, \\\"DepositContract: deposit value too low\\\");\\n require(msg.value % 1 gwei == 0, \\\"DepositContract: deposit value not multiple of gwei\\\");\\n uint deposit_amount = msg.value / 1 gwei;\\n require(deposit_amount <= type(uint64).max, \\\"DepositContract: deposit value too high\\\");\\n\\n // Emit `DepositEvent` log\\n bytes memory amount = to_little_endian_64(uint64(deposit_amount));\\n emit DepositEvent(\\n pubkey,\\n withdrawal_credentials,\\n amount,\\n signature,\\n to_little_endian_64(uint64(deposit_count))\\n );\\n\\n // Compute deposit data root (`DepositData` hash tree root)\\n bytes32 pubkey_root = sha256(abi.encodePacked(pubkey, bytes16(0)));\\n bytes32 signature_root = sha256(abi.encodePacked(\\n sha256(abi.encodePacked(signature[:64])),\\n sha256(abi.encodePacked(signature[64:], bytes32(0)))\\n ));\\n bytes32 node = sha256(abi.encodePacked(\\n sha256(abi.encodePacked(pubkey_root, withdrawal_credentials)),\\n sha256(abi.encodePacked(amount, bytes24(0), signature_root))\\n ));\\n\\n // Verify computed and expected deposit data roots match\\n require(node == deposit_data_root, \\\"DepositContract: reconstructed DepositData does not match supplied deposit_data_root\\\");\\n\\n // Avoid overflowing the Merkle tree (and prevent edge case in computing `branch`)\\n require(deposit_count < MAX_DEPOSIT_COUNT, \\\"DepositContract: merkle tree full\\\");\\n\\n // Add deposit data root to Merkle tree (update a single `branch` node)\\n deposit_count += 1;\\n uint size = deposit_count;\\n for (uint height = 0; height < DEPOSIT_CONTRACT_TREE_DEPTH; height++) {\\n if ((size & 1) == 1) {\\n branch[height] = node;\\n return;\\n }\\n node = sha256(abi.encodePacked(branch[height], node));\\n size /= 2;\\n }\\n // As the loop should always end prematurely with the `return` statement,\\n // this code should be unreachable. We assert `false` just to be safe.\\n assert(false);\\n }\\n\\n function supportsInterface(bytes4 interfaceId) override external pure returns (bool) {\\n return interfaceId == type(ERC165).interfaceId || interfaceId == type(IDepositContract).interfaceId;\\n }\\n\\n function to_little_endian_64(uint64 value) internal pure returns (bytes memory ret) {\\n ret = new bytes(8);\\n bytes8 bytesValue = bytes8(value);\\n // Byteswapping during copying to bytes.\\n ret[0] = bytesValue[7];\\n ret[1] = bytesValue[6];\\n ret[2] = bytesValue[5];\\n ret[3] = bytesValue[4];\\n ret[4] = bytesValue[3];\\n ret[5] = bytesValue[2];\\n ret[6] = bytesValue[1];\\n ret[7] = bytesValue[0];\\n }\\n}\\n\",\"keccak256\":\"0xeb4884395e470268e1ff14dca32e7a030425557a23cb16013c4d25914fd1e4a1\",\"license\":\"CC0-1.0\"}},\"version\":1}","userdoc":{"kind":"user","events":{"DepositEvent(bytes,bytes,bytes,bytes,bytes)":{"notice":"A processed deposit event."}},"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","methods":{"get_deposit_root()":{"notice":"Query the current deposit root hash."},"get_deposit_count()":{"notice":"Query the current deposit count."},"supportsInterface(bytes4)":{"notice":"Query if a contract implements an interface"},"deposit(bytes,bytes,bytes,bytes32)":{"notice":"Submit a Phase 0 DepositData object."}},"version":1},"devdoc":{"kind":"dev","methods":{"get_deposit_root()":{"returns":{"_0":"The deposit root hash."}},"get_deposit_count()":{"returns":{"_0":"The deposit count encoded as a little endian 64-bit number."}},"supportsInterface(bytes4)":{"params":{"interfaceId":"The interface identifier, as specified in ERC-165"},"details":"Interface identification is specified in ERC-165. This function uses less than 30,000 gas.","returns":{"_0":"`true` if the contract implements `interfaceId` and `interfaceId` is not 0xffffffff, `false` otherwise"}},"deposit(bytes,bytes,bytes,bytes32)":{"params":{"pubkey":"A BLS12-381 public key.","signature":"A BLS12-381 signature.","deposit_data_root":"The SHA-256 hash of the SSZ-encoded DepositData object. Used as a protection against malformed input.","withdrawal_credentials":"Commitment to a public key for 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