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Update erc20_tutorial.sol #18

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Update erc20_tutorial.sol #18

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122 changes: 18 additions & 104 deletions contracts/erc20_tutorial.sol
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Original file line number Diff line number Diff line change
@@ -1,13 +1,13 @@
pragma solidity ^0.4.24;
programa solidity ^0.4.24;

// ----------------------------------------------------------------------------
// '0Fucks' token contract
// 'FURIOUS COIN ' token contract
//
// Deployed to : 0x5A86f0cafD4ef3ba4f0344C138afcC84bd1ED222
// Symbol : 0FUCKS
// Name : 0 Fucks Token
// Total supply: 100000000
// Decimals : 18
// Deployed to : 0xa6249C9044caaB34a1875A6e0db9a17Ffc7DAaCB
// Symbol : FRC
// Name : FURIOUS COIN Token
// Total supply: 1900000000
// Decimals : 08
//
// Enjoy.
//
Expand Down Expand Up @@ -39,7 +39,7 @@ contract SafeMath {


// ----------------------------------------------------------------------------
// ERC Token Standard #20 Interface
// ERC Standard #20 Interface
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// ----------------------------------------------------------------------------
contract ERC20Interface {
Expand All @@ -52,8 +52,8 @@ contract ERC20Interface {

event Transfer(address indexed from, address indexed to, uint tokens);
event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
}

{

// ----------------------------------------------------------------------------
// Contract function to receive approval and execute function in one call
Expand Down Expand Up @@ -94,12 +94,11 @@ contract Owned {
}
}


// ----------------------------------------------------------------------------
// ERC20 Token, with the addition of symbol, name and decimals and assisted
// token transfers
// ----------------------------------------------------------------------------
contract FucksToken is ERC20Interface, Owned, SafeMath {
contract FURIOUS COIN is ERC20Interface, Owned, SafeMath {
string public symbol;
string public name;
uint8 public decimals;
Expand All @@ -112,17 +111,16 @@ contract FucksToken is ERC20Interface, Owned, SafeMath {
// ------------------------------------------------------------------------
// Constructor
// ------------------------------------------------------------------------
constructor() public {
symbol = "0FUCKS";
name = "0 Fucks Token";
decimals = 18;
_totalSupply = 100000000000000000000000000;
balances[0x5A86f0cafD4ef3ba4f0344C138afcC84bd1ED222] = _totalSupply;
emit Transfer(address(0), 0x5A86f0cafD4ef3ba4f0344C138afcC84bd1ED222, _totalSupply);
function FURIOUS COIN TOKEN() public {
symbol = "FRC";
name = "FURIOUS COIN TOKEN ";
decimals = 08;
_totalSupply = 1900000000;
balances[0xa6249C9044caaB34a1875A6e0db9a17Ffc7DAaCB] = _totalSupply;
emit Transfer(address(0), 0xa6249C9044caaB34a1875A6e0db9a17Ffc7DAaCB, _totalSupply);
}


// ------------------------------------------------------------------------
// ------------------------------------------------------------------------
// Total supply
// ------------------------------------------------------------------------
function totalSupply() public constant returns (uint) {
Expand All @@ -137,87 +135,3 @@ contract FucksToken is ERC20Interface, Owned, SafeMath {
return balances[tokenOwner];
}


// ------------------------------------------------------------------------
// Transfer the balance from token owner's account to to account
// - Owner's account must have sufficient balance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transfer(address to, uint tokens) public returns (bool success) {
balances[msg.sender] = safeSub(balances[msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
emit Transfer(msg.sender, to, tokens);
return true;
}


// ------------------------------------------------------------------------
// Token owner can approve for spender to transferFrom(...) tokens
// from the token owner's account
//
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// recommends that there are no checks for the approval double-spend attack
// as this should be implemented in user interfaces
// ------------------------------------------------------------------------
function approve(address spender, uint tokens) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
emit Approval(msg.sender, spender, tokens);
return true;
}


// ------------------------------------------------------------------------
// Transfer tokens from the from account to the to account
//
// The calling account must already have sufficient tokens approve(...)-d
// for spending from the from account and
// - From account must have sufficient balance to transfer
// - Spender must have sufficient allowance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transferFrom(address from, address to, uint tokens) public returns (bool success) {
balances[from] = safeSub(balances[from], tokens);
allowed[from][msg.sender] = safeSub(allowed[from][msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
emit Transfer(from, to, tokens);
return true;
}


// ------------------------------------------------------------------------
// Returns the amount of tokens approved by the owner that can be
// transferred to the spender's account
// ------------------------------------------------------------------------
function allowance(address tokenOwner, address spender) public constant returns (uint remaining) {
return allowed[tokenOwner][spender];
}


// ------------------------------------------------------------------------
// Token owner can approve for spender to transferFrom(...) tokens
// from the token owner's account. The spender contract function
// receiveApproval(...) is then executed
// ------------------------------------------------------------------------
function approveAndCall(address spender, uint tokens, bytes data) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
emit Approval(msg.sender, spender, tokens);
ApproveAndCallFallBack(spender).receiveApproval(msg.sender, tokens, this, data);
return true;
}


// ------------------------------------------------------------------------
// Don't accept ETH
// ------------------------------------------------------------------------
function () public payable {
revert();
}


// ------------------------------------------------------------------------
// Owner can transfer out any accidentally sent ERC20 tokens
// ------------------------------------------------------------------------
function transferAnyERC20Token(address tokenAddress, uint tokens) public onlyOwner returns (bool success) {
return ERC20Interface(tokenAddress).transfer(owner, tokens);
}
}