Adecom16

Technical Specification: High-Scale Notification System (1M+ Users)

1. System Overview

A reliable, multi-channel (Push, SMS, Email) notification system designed to handle over 1 million users. The architecture prioritizes at-least-once delivery, strict deduplication, horizontal scalability, and automatic provider failover.

2. Core Architecture & Component Design## 2.1 API Edge Layer

• Ingress: High-throughput REST/gRPC endpoints receiving notification requests from internal microservices.
• Payload Validation: Validates recipient schemas, token presences, and templates before acknowledging receipt.
• Immediate Ack: Acknowledges requests with a unique notification_id and HTTP 202 (Accepted) immediately after pushing to the ingestion queue.

Adecom16

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.19;

/**
 * @title EIP-7777: Decentralized Reputation Protocol (DRP)
 * @dev This contract implements a new standard for decentralized reputation management
 * 
 * EIP-7777 Abstract:
 * This EIP proposes a standardized interface for decentralized reputation systems
 * that enables trustless reputation scoring, delegation, and cross-platform interoperability.

Adecom16

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (access/Ownable.sol)

pragma solidity ^0.8.20;

import {Context} from "../utils/Context.sol";

/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to

Adecom16

Title: Ethereum Smart Contracts and Gas Mechanisms Explained

Introduction:
Ethereum is one of the most widely used blockchain platforms, primarily due to its ability to support smart contracts and decentralized applications (dApps). Ethereum’s flexibility allows developers to deploy self-executing contracts that run directly on the blockchain, without the need for intermediaries. However, running code on Ethereum comes with a cost, known as gas, which is essential to the network’s security and efficiency. In this essay, I will break down the core concepts of smart contracts and gas, explaining how they work, why they are necessary, and how they impact the Ethereum ecosystem.

What Are Smart Contracts?

A smart contract is essentially a program that runs on the Ethereum blockchain. Unlike traditional contracts that are enforced by intermediaries (such as banks or lawyers), smart contracts are self-executing. This means that once a smart contract’s conditions are met, it automatically executes the terms of the

Adecom16

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.1;

interface IVotingPoll {
    function factory() external view returns(address);

    function createPoll(string calldata _title, string[] calldata _candidates) external;

    function vote(uint candidate) external;

Adecom16

// SPDX-License-Identifier: MIT


pragma solidity ^0.8.0;

contract LMS {
    // Structs
    struct User {
        string name;
        string email;

Adecom16

// SPDX-License-Identifier: MIT

pragma solidity 0.8.19;

contract Exploit_VIP_Bank {
    VIP_Bank bank; 
    constructor(address _bankAddress) {
        bank = VIP_Bank(_bankAddress);
    }

Adecom16

import { Flex, Button, Dialog, Text, TextField } from "@radix-ui/themes";
import {
  useWeb3ModalAccount,
  useWeb3ModalProvider,
} from "@web3modal/ethers/react";
import { isSupportedChian } from "../utils";
import { getProvider } from "../constants/providers";
import { getProposalContract } from "../constants/contracts";
import { useState } from "react";
import { isAddress } from "ethers";

Adecom16

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/math/SafeMath.sol";

contract NFTMarketplace is ERC721, Ownable {
    using SafeMath for uint256;

Adecom16

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

contract Funds {
    // Mapping to store the balances deposited by each address
    mapping(address => uint256) public depositedFunds;
    
    // Variable to store the total funds transferred directly to the contract
    uint256 public totalFundsTransferred;