59 lines
2.1 KiB
Solidity
59 lines
2.1 KiB
Solidity
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// SPDX-License-Identifier: MIT
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pragma solidity ^0.6.0;
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contract Pack {
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uint256 public constant CHUNK_TREE_HEIGHT = 7;
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uint256 public constant CHUNK_SIZE = 2**CHUNK_TREE_HEIGHT;
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uint256 public constant ITEM_SIZE = 32 + 20 + 4;
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uint256 public constant BYTES_SIZE = CHUNK_SIZE * ITEM_SIZE;
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uint256 public gas1;
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uint256 public gas2;
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uint256 public gas3;
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uint256 public gas4;
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bytes32 public hash;
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event DepositData(address instance, bytes32 indexed hash, uint256 block, uint256 index);
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function pack2(bytes32[CHUNK_SIZE] memory hashes, address[CHUNK_SIZE] memory instances, uint32[CHUNK_SIZE] memory blocks) public {
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uint256 gasBefore = gasleft();
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bytes memory data = new bytes(BYTES_SIZE);
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for(uint i = 0; i < CHUNK_SIZE; i++) {
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(bytes32 hash, address instance, uint32 block) = (hashes[i], instances[i], blocks[i]);
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assembly {
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mstore(add(add(data, mul(ITEM_SIZE, i)), 0x38), block)
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mstore(add(add(data, mul(ITEM_SIZE, i)), 0x34), instance)
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mstore(add(add(data, mul(ITEM_SIZE, i)), 0x20), hash)
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}
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}
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uint256 gasHash = gasleft();
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bytes32 hash1 = sha256(data);
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uint256 gasEvents = gasleft();
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for(uint i = 0; i < CHUNK_SIZE; i++) {
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emit DepositData(instances[i], hashes[i], blocks[i], i);
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}
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gas1 = gasEvents - gasleft();
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gas2 = gasHash - gasEvents;
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gas3 = gasBefore - gasHash;
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gas4 = gasBefore;
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hash = hash1;
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}
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function pack3(bytes32[CHUNK_SIZE] memory hashes, address[CHUNK_SIZE] memory instances, uint32[CHUNK_SIZE] memory blocks) public view returns(uint256 gas1, uint256 gas2, bytes32 hash) {
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uint256 gasBefore = gasleft();
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bytes memory data = new bytes(BYTES_SIZE);
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for(uint i = 0; i < CHUNK_SIZE; i++) {
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(bytes32 hash, address instance, uint32 block) = (hashes[i], instances[i], blocks[i]);
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assembly {
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mstore(add(add(data, mul(ITEM_SIZE, i)), 0x38), block)
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mstore(add(add(data, mul(ITEM_SIZE, i)), 0x34), instance)
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mstore(add(add(data, mul(ITEM_SIZE, i)), 0x20), hash)
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}
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}
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uint256 gasHash = gasleft();
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bytes32 hash = sha256(data);
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return (gasleft() - gasHash, gasHash - gasBefore, hash);
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}
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}
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