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gwenf/PhoneCompany.sol

Last active September 5, 2025 06:04
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Revisions

  1. gwenf revised this gist Mar 20, 2020. 1 changed file with 58 additions and 9 deletions.
    67 changes: 58 additions & 9 deletions PhoneCompany.sol
    View file
    Original file line number Diff line number Diff line change
    @@ -7,20 +7,25 @@ pragma solidity >=0.4.22 <0.7.0;

    contract PhoneCompany {
    uint public chargeAmount;
    uint public coinPrice;
    address companyOwner;

    // a list of phone numbers attached to my address
    // only the user can view their own phonebook

    struct Entry {
    mapping(uint => uint[]) whitelisted;

    struct User {
    string name;
    uint phoneNumber;
    uint coins;
    }
    mapping(address => Entry[]) phoneBook;
    mapping(address => User) users;

    constructor(uint amount) public {
    constructor(uint amount, uint price) public {
    companyOwner = msg.sender;
    chargeAmount = amount;
    coinPrice = price;
    }

    function updateAmount(uint amount) public {
    @@ -31,13 +36,57 @@ contract PhoneCompany {
    chargeAmount = amount;
    }

    function initNewUser(uint phoneNumber, string memory name) public {
    // msg.sender;
    // return coins
    function initNewUser(uint phoneNumber, string memory name) payable public returns(string memory) {
    // check amount paid
    require(
    msg.value >= coinPrice * 100,
    "You didn't send enough money to buy 100 coins."
    );
    users[msg.sender] = User({
    phoneNumber: phoneNumber,
    name: name,
    coins: 100
    });
    return 'Success! You now have 100 coins.';
    }

    function coinBalance() public view returns(uint) {
    return users[msg.sender].coins;
    }

    // add a phone number to a users phone book, whitelist
    function addPhoneNumber(uint phoneNumber) public {
    whitelisted[users[msg.sender].phoneNumber].push(phoneNumber);
    }

    function makeCall(uint phoneNumber) public returns(uint) {
    bool isWhitelisted = false;
    uint userPhone = users[msg.sender].phoneNumber;
    for (uint i; i < whitelisted[userPhone].length; i++) {
    if (whitelisted[userPhone][i] == phoneNumber) {
    isWhitelisted = true;
    break;
    }
    }

    if (!isWhitelisted) {
    users[msg.sender].coins = users[msg.sender].coins - chargeAmount;
    }
    return users[msg.sender].coins;
    }

    function addPhoneNumber(uint phoneNumber, string memory name) public {
    // add a phone number to a users phone book
    // users can restock their coins
    function buyCoins() public payable returns(uint) {
    require(
    msg.value >= coinPrice,
    "You didn't send enough money to buy coins."
    );
    uint coinNum = msg.value / coinPrice;

    users[msg.sender].coins = users[msg.sender].coins + coinNum;
    return users[msg.sender].coins;
    }

    }
    // addLastCallerToWhitelist
    // store info of last caller and return coins
    }
  2. gwenf created this gist Mar 13, 2020.
    43 changes: 43 additions & 0 deletions PhoneCompany.sol
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,43 @@
    pragma solidity >=0.4.22 <0.7.0;
    // phone company dapp

    // charge telemarkers coins for calls
    // whitelist people don't get charged
    // anyone not on the whitelist has to pay a small fee

    contract PhoneCompany {
    uint public chargeAmount;
    address companyOwner;

    // a list of phone numbers attached to my address
    // only the user can view their own phonebook

    struct Entry {
    string name;
    uint phoneNumber;
    }
    mapping(address => Entry[]) phoneBook;

    constructor(uint amount) public {
    companyOwner = msg.sender;
    chargeAmount = amount;
    }

    function updateAmount(uint amount) public {
    require(
    msg.sender == companyOwner,
    "Only the company owner can update charge amount."
    );
    chargeAmount = amount;
    }

    function initNewUser(uint phoneNumber, string memory name) public {
    // msg.sender;
    // return coins
    }

    function addPhoneNumber(uint phoneNumber, string memory name) public {
    // add a phone number to a users phone book
    }

    }