foreign exchange values for currencies

[5-mark]

User Story

As user I want to know how much value cryptocurrencies and tokens have in my local fiat currency so that I can put treasury portfolios or my own balance into context.

Acceptance Criteria

1. All supported asset exchange rates can be retrieved through our Graph
2. The Graph should act as it would get the data from an oracle
3. Fx rates:

• 1 ZERO = 10 USD
• 1 GAME = 10 USD
• 1 PLAY = 1 USD
• 1 aUSD = 1 USD

trading pairs:

USDZERO ZEROUSD USDGAME GAMEUSD USDAUSD AUSDUSD USDPLAY PLAYUSD

example query:

subscription {
  fx('USDZERO',value)
}

4. The exchange rates should have a +/- 5% volatility for each unstable token (ZERO, GAME)
5. the frontend Graph should consume the data fx rates and possibly index the corresponding fiat values of treasuries and wallets

Additional Information

• this feature should enable us displaying the corresponding fiat values in my account and organisation treasuries properly to the user

How to test

1. a
2. b
3. c
4. d