miloofcroton/erc20

Simple kata to create an ERC20 fixed supply Token.

Hello ERC20 Kata

Simple kata to create an ERC20 fixed supply Token.

Requirements

Iteration 1 - Token Metadata

Feature: Token Contract Metadata

As a Token Contract I want to have standard metadata fields.

• Can get the Token's name as a public field
• Can get the Token's three character symbol as a public field

Feature: Decimal level

As a Token Contract I want to set the decimal level.

• Can get the Token's decimal level as a public field

Iteration 2 - Basic Token

Feature: Fixed Token Supply

As a Token Contract I want a fixed supply of Tokens assigned to the creator

• public view function totalSupply() returns a uint256 with the total supply of tokens
• public view function balanceOf() returns a uint256 the supply of tokens for the address passed in

Feature: Transfer Tokens

As a Token holder I want to be able to transfer them to another address.

• public transfer function
• pass in target address and amount of tokens
• does not allow user to send tokens to self
• does not allow user to send tokens they don't have
• returns if successful or not

Feature: Emits Transfer Event

As a Token Contract I want to emit a Transfer event when the transfer function is called.

• Should be able to read a Transfer Event off of the event logs

Iteration 3 - ERC20 Token

Feature: Allowance

As an Blockchain User I want to be able to see how many tokens a Token holder has allowed someone else to spend on their behalf.

• passing in owner and spender addresses returns amount
• returns zero if none have been approbed

Feature: Approve

As a token holder I want to allow another address to transfer tokens on my behalf.

• passing in address of spender and amount returns true if possible
• emits an Approval event when successful

Feature: Transfer From

As a third party I want to be able to transfer Token from one address to another when I've been approved.

• Approved third party address is able to transfer tokens from an approved address to another address
• Emits a Transfer Event