scripts/create-token.py: move Solidity code template to external file
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2 changed files with 123 additions and 120 deletions
119
scripts/ERC20.sol.in
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119
scripts/ERC20.sol.in
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/*
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SPDX-License-Identifier: GPL-3.0-or-later
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ERC Token Standard #20 Interface
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https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
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*/
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pragma solidity $solc_ver_pat;
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contract SafeMath {
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function safeAdd(uint a, uint b) public pure returns (uint c) {
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c = a + b;
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require(c >= a);
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}
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function safeSub(uint a, uint b) public pure returns (uint c) {
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require(b <= a);
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c = a - b;
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}
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function safeMul(uint a, uint b) public pure returns (uint c) {
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c = a * b;
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require(a == 0 || c / a == b);
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}
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function safeDiv(uint a, uint b) public pure returns (uint c) {
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require(b > 0);
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c = a / b;
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}
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}
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abstract contract ERC20Interface {
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function totalSupply() public virtual returns (uint);
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function balanceOf(address tokenOwner) public virtual returns (uint balance);
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function allowance(address tokenOwner, address spender) public virtual returns (uint remaining);
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function transfer(address to, uint tokens) public virtual returns (bool success);
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function approve(address spender, uint tokens) public virtual returns (bool success);
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function transferFrom(address from, address to, uint tokens) public virtual returns (bool success);
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event Transfer(address indexed from, address indexed to, uint tokens);
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event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
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}
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contract Owned {
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address public owner;
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address public newOwner;
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event OwnershipTransferred(address indexed _from, address indexed _to);
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constructor() {
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owner = msg.sender;
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}
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modifier onlyOwner {
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require(msg.sender == owner);
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_;
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}
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function transferOwnership(address _newOwner) public onlyOwner {
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newOwner = _newOwner;
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}
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function acceptOwnership() public {
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require(msg.sender == newOwner);
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emit OwnershipTransferred(owner, newOwner);
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owner = newOwner;
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newOwner = address(0);
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}
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}
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// ----------------------------------------------------------------------------
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// ERC20 Token, with the addition of symbol, name and decimals and assisted
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// token transfers
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// ----------------------------------------------------------------------------
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contract Token is ERC20Interface, Owned, SafeMath {
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string public symbol;
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string public name;
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uint8 public decimals;
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uint public _totalSupply;
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mapping(address => uint) balances;
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mapping(address => mapping(address => uint)) allowed;
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constructor() {
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symbol = "$symbol";
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name = "$name";
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decimals = $decimals;
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_totalSupply = $supply;
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balances[$owner_addr] = _totalSupply;
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emit Transfer(address(0), $owner_addr, _totalSupply);
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}
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function totalSupply() public view override returns (uint) {
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return _totalSupply - balances[address(0)];
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}
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function balanceOf(address tokenOwner) public view override returns (uint balance) {
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return balances[tokenOwner];
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}
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function transfer(address to, uint tokens) public override returns (bool success) {
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balances[msg.sender] = safeSub(balances[msg.sender], tokens);
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balances[to] = safeAdd(balances[to], tokens);
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emit Transfer(msg.sender, to, tokens);
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return true;
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}
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function approve(address spender, uint tokens) public override returns (bool success) {
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allowed[msg.sender][spender] = tokens;
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emit Approval(msg.sender, spender, tokens);
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return true;
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}
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function transferFrom(address from, address to, uint tokens) public override returns (bool success) {
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balances[from] = safeSub(balances[from], tokens);
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allowed[from][msg.sender] = safeSub(allowed[from][msg.sender], tokens);
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balances[to] = safeAdd(balances[to], tokens);
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emit Transfer(from, to, tokens);
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return true;
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}
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function allowance(address tokenOwner, address spender) public view override returns (uint remaining) {
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return allowed[tokenOwner][spender];
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}
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// Owner can transfer out any accidentally sent ERC20 tokens
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function transferAnyERC20Token(address tokenAddress, uint tokens) public onlyOwner returns (bool success) {
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return ERC20Interface(tokenAddress).transfer(owner, tokens);
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}
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}
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@ -66,125 +66,9 @@ Use ‘mmgen-tool eth_checksummed_addr’ to create it if necessary.
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}
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}
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# ERC Token Standard #20 Interface
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# https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
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solidity_code_template = """
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// SPDX-License-Identifier: GPL-3.0-or-later
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pragma solidity %s;
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contract SafeMath {
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function safeAdd(uint a, uint b) public pure returns (uint c) {
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c = a + b;
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require(c >= a);
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}
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function safeSub(uint a, uint b) public pure returns (uint c) {
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require(b <= a);
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c = a - b;
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}
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function safeMul(uint a, uint b) public pure returns (uint c) {
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c = a * b;
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require(a == 0 || c / a == b);
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}
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function safeDiv(uint a, uint b) public pure returns (uint c) {
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require(b > 0);
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c = a / b;
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}
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}
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abstract contract ERC20Interface {
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function totalSupply() public virtual returns (uint);
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function balanceOf(address tokenOwner) public virtual returns (uint balance);
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function allowance(address tokenOwner, address spender) public virtual returns (uint remaining);
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function transfer(address to, uint tokens) public virtual returns (bool success);
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function approve(address spender, uint tokens) public virtual returns (bool success);
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function transferFrom(address from, address to, uint tokens) public virtual returns (bool success);
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event Transfer(address indexed from, address indexed to, uint tokens);
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event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
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}
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contract Owned {
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address public owner;
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address public newOwner;
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event OwnershipTransferred(address indexed _from, address indexed _to);
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constructor() {
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owner = msg.sender;
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}
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modifier onlyOwner {
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require(msg.sender == owner);
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_;
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}
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function transferOwnership(address _newOwner) public onlyOwner {
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newOwner = _newOwner;
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}
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function acceptOwnership() public {
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require(msg.sender == newOwner);
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emit OwnershipTransferred(owner, newOwner);
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owner = newOwner;
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newOwner = address(0);
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}
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}
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// ----------------------------------------------------------------------------
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// ERC20 Token, with the addition of symbol, name and decimals and assisted
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// token transfers
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// ----------------------------------------------------------------------------
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contract Token is ERC20Interface, Owned, SafeMath {
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string public symbol;
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string public name;
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uint8 public decimals;
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uint public _totalSupply;
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mapping(address => uint) balances;
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mapping(address => mapping(address => uint)) allowed;
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constructor() {
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symbol = "$symbol";
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name = "$name";
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decimals = $decimals;
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_totalSupply = $supply;
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balances[$owner_addr] = _totalSupply;
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emit Transfer(address(0), $owner_addr, _totalSupply);
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}
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function totalSupply() public view override returns (uint) {
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return _totalSupply - balances[address(0)];
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}
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function balanceOf(address tokenOwner) public view override returns (uint balance) {
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return balances[tokenOwner];
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}
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function transfer(address to, uint tokens) public override returns (bool success) {
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balances[msg.sender] = safeSub(balances[msg.sender], tokens);
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balances[to] = safeAdd(balances[to], tokens);
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emit Transfer(msg.sender, to, tokens);
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return true;
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}
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function approve(address spender, uint tokens) public override returns (bool success) {
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allowed[msg.sender][spender] = tokens;
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emit Approval(msg.sender, spender, tokens);
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return true;
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}
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function transferFrom(address from, address to, uint tokens) public override returns (bool success) {
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balances[from] = safeSub(balances[from], tokens);
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allowed[from][msg.sender] = safeSub(allowed[from][msg.sender], tokens);
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balances[to] = safeAdd(balances[to], tokens);
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emit Transfer(from, to, tokens);
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return true;
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}
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function allowance(address tokenOwner, address spender) public view override returns (uint remaining) {
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return allowed[tokenOwner][spender];
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}
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// Owner can transfer out any accidentally sent ERC20 tokens
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function transferAnyERC20Token(address tokenAddress, uint tokens) public onlyOwner returns (bool success) {
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return ERC20Interface(tokenAddress).transfer(owner, tokens);
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}
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}
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""" % req_solc_ver_pat
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import os
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with open(os.path.join(os.path.dirname(__file__), 'ERC20.sol.in')) as fh:
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solidity_code_template = fh.read()
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def create_src(cfg, template, token_data):
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@ -209,7 +93,7 @@ def create_src(cfg, template, token_data):
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yield (k, field.conversion(val))
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from string import Template
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return Template(template).substitute(**dict(gen()))
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return Template(template).substitute(**(dict(gen()) | {'solc_ver_pat': req_solc_ver_pat}))
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def check_solc_version():
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"""
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