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qourier-module-v0-ticker-symbol

v0.0.2

Published

The price at which tokens are traded on the CEX (Binance).

Downloads

12

Readme

Ticker Symbol

The price at which tokens are traded on the CEX (Binance).

Use by Developers

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.13;

import "@qourier/contracts/Hub.sol";

contract TickerSymbol {
    address public hub;
    uint256 public price;

    uint256 private id;
    uint256 private result;

    constructor(address hub_, uint256 price_) {
        hub = hub_;
        price = price_;
    }

    function createTask(string memory symbol_) public payable {
        Hub(hub).createTask1{ value: price }(
            bytes32("ticker-symbol"),
            [bytes(symbol_)]
        );
    }

    function completeTask(uint256 id_, bytes memory result_) external {
        require(msg.sender == hub, "Only Qourier can change the state.");
        id = id_;
        result = bytesToUint(result_);
    }

    function getTask() public view returns(uint256, uint256) {
        return (id, result);
    }

    function bytesToUint(bytes memory b) public pure returns (uint256) {
        uint256 res = 0;
        for (uint256 i = 0; i < b.length; i++) {
            uint256 c = uint256(uint8(b[i]));
            if (c >= 48 && c <= 57) {
                res = res * 10 + (c - 48);
            }
        }
        return res;
    }
}