Support for ERC20 Tokens

Target release	Mercury
Epic
Document status	DRAFT
Document owner	@Medha Parlikar (Unlicensed)
Designer
Developers
QA

Goals

Growth

Background and strategic fit

Most tokens in the market today are ERC20 tokens. Supporting this standard includes RChain tokens in the mainstream body of tokens available today. Here are the key methods that are part of the ERC20 Token contract.

functiontotalSupply()constantreturns(uinttotalSupply); 4 functionbalanceOf(address_owner)constantreturns(uintbalance); 5 functiontransfer(address_to,uint_value)returns(boolsuccess); 6 functiontransferFrom(address_from,address_to,uint_value)returns(boolsuccess); 7 functionapprove(address_spender,uint_value)returns(boolsuccess); 8 functionallowance(address_owner,address_spender)constantreturns(uintremaining); 9 eventTransfer(addressindexed_from,addressindexed_to,uint_value);10 eventApproval(addressindexed_owner,addressindexed_spender,uint_value);

Assumptions

Requirements

#	Title	User Story	Importance	Notes

#	Title	User Story	Importance	Notes
1	Address format	Determine the format for RChain addresses	Must Have	ECDSA curves
2	Token Properties	Come up with the properties of the Rev token	Must Have	Name, decimal point, etc..
3	Rev Distribution	Determine how Rev will be distributed, mined, released and implement.	Must Have	Validator rewards, supply parameters
4	Rev to Phlogiston Exchange	System contracts that exchange Rev to Phlogiston and back	Must Have	Powers the purchase of Phlogiston with Rev
5

User interaction and design

Questions

Below is a list of questions to be addressed as a result of this requirements document:

Question	Outcome

Question	Outcome
Does Rev pay for itself?	Rev is a special contract. It is not like other tokens. It is a staking token. Every node is going to run a Rev contract, and they won't be paid for it. No rent needs to be paid on the Rev token contract. This is what makes staking tokens special from other types of tokens.