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| − | The ERC20 token is the most commonly used token standard on the [[Ethereum]] blockchain. As such, it is the most popular token for companies running an [[ICO]].
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| − | == Token Functions ==
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| − | The ERC20 token required functions are:
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| − | * Get the total token supply:
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| − | <code>function totalSupply() public constant returns (uint);</code>
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| − | * Get the account balance of another account:
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| − | <code>function balanceOf(address tokenOwner) public constant returns (uint balance);</code>
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| − | * Returns the amount which the spender is still allowed to withdraw from the owner:
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| − | <code>function allowance(address tokenOwner, address spender) public constant returns (uint remaining);</code>
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| − | * Send amount of tokens to address:
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| − | <code>function transfer(address to, uint tokens) public returns (bool success);</code>
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| − | * Allow spender to withdraw from your account, multiple times, up to the amount written. If this function is called again it overwrites the current allowance with the value:
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| − | <code>function approve(address spender, uint tokens) public returns (bool success);</code>
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| − | * Send amount of tokens from one address to another address:
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| − | <code>function transferFrom(address from, address to, uint tokens) public returns (bool success);</code>
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| − | * Triggered when tokens are transferred
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| − | <code>event Transfer(address indexed from, address indexed to, uint tokens);</code>
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| − | * Triggered whenever approve is called:
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| − | <code>event Approval(address indexed tokenOwner, address indexed spender, uint tokens);</code>
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| − | }
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| − | == ERC20 Examples ==
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| − | * [[QTUM]]
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| − | * [[EOS]]
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| − | * [[KredCoins]]
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| − | == Links ==
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| − | [https://blocktorial.com/guides--tutorials/how-to-create-your-own-erc-20-token-in-2o-minutes-or-less Create your own ERC20 token]
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