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52 lines
1.4 KiB
Solidity
52 lines
1.4 KiB
Solidity
// SPDX-License-Identifier: MIT
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pragma solidity ^0.8.0;
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import "./Memory.sol";
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// Create a storage slot by appending data to the end
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contract StorageSlotFromContract {
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constructor(address contractAddr, bytes memory data) payable {
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uint256 codeSize;
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assembly {
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// retrieve the size of the code, this needs assembly
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codeSize := extcodesize(contractAddr)
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}
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uint256 totalSize = codeSize + data.length + 32;
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bytes memory deployCode = new bytes(totalSize);
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// Copy contract code
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assembly {
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// actually retrieve the code, this needs assembly
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extcodecopy(contractAddr, add(deployCode, 0x20), 0, codeSize)
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}
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// Copy data
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uint256 off = Memory.dataPtr(deployCode) + codeSize;
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Memory.copy(Memory.dataPtr(data), off, data.length);
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off += data.length;
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uint256 len = data.length;
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// Set data size
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assembly {
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mstore(off, len)
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}
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// Return the contract manually
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assembly {
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return(add(deployCode, 0x20), totalSize)
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}
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}
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}
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// Create a storage slot
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contract StorageSlotFactoryFromInput {
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constructor(bytes memory codeAndData) payable {
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uint256 size = codeAndData.length;
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// Return the contract manually
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assembly {
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return(add(codeAndData, 0x20), size)
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}
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}
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}
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