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SampleRedstoneConsumerBytesMock.sol
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SampleRedstoneConsumerBytesMock.sol
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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;
import "../mocks/RedstoneConsumerBytesMock.sol";
import "../libs/NumericArrayLib.sol";
contract SampleRedstoneConsumerBytesMock is RedstoneConsumerBytesMock {
uint256 constant BITS_COUNT_IN_ONE_BYTE = 8;
uint256 public latestSavedValue;
function aggregateByteValues(uint256[] memory calldataPointersForValues)
public
pure
override
returns (bytes memory)
{
uint256[] memory numericValues = new uint256[](calldataPointersForValues.length);
for (uint256 i = 0; i < calldataPointersForValues.length; i++) {
bytes calldata bytesValue = getCalldataBytesFromCalldataPointer(
calldataPointersForValues[i]
);
numericValues[i] = calldataBytesToUint256(bytesValue);
}
uint256 numericAggregatedResult = NumericArrayLib.pickMedian(numericValues);
bytes memory aggregatedResult = abi.encodePacked(numericAggregatedResult);
// convert uint256 to bytes
return aggregatedResult;
}
function getValueSecurely(bytes32 dataFeedId) public view returns (uint256) {
bytes memory bytesValueFromOracle = getOracleBytesValueFromTxMsg(dataFeedId);
return bytesToUint256(bytesValueFromOracle);
}
function saveOracleValueInContractStorage(bytes32 dataFeedId) public {
bytes memory bytesValueFromOracle = getOracleBytesValueFromTxMsg(dataFeedId);
latestSavedValue = bytesToUint256(bytesValueFromOracle);
}
function calldataBytesToUint256(bytes calldata bytesValue)
private
pure
returns (uint256 uintValue)
{
assembly {
let byteSize := bytesValue.length
let bitSize := mul(byteSize, BITS_COUNT_IN_ONE_BYTE)
uintValue := shr(sub(256, bitSize), calldataload(bytesValue.offset))
}
}
function bytesToUint256(bytes memory bytesValue) private pure returns (uint256 uintValue) {
assembly {
let byteSize := mload(bytesValue)
let bitSize := mul(byteSize, BITS_COUNT_IN_ONE_BYTE)
uintValue := shr(sub(256, bitSize), mload(add(bytesValue, BYTES_ARR_LEN_VAR_BS)))
}
}
}