💥 New decimal-aware price system - Part 1: Business Logic

[JuaniRios]

What?

• Introduce a new price system so we can convert asset->usd->asset correctly when they have different decimals.

Why?

• Even if issuers use 10 decimals for their CT, we already know USDT and USDC use 6 decimals, so any conversions would be wrong.

How?

Change the price of assets instead of being for example PriceOf::from_float(1.5) for a price of 1.5$, we now use a relationship between our USD decimals and the asset decimals like so PriceOf::from_rational(1.5 * 10^6, 1 * 10^10) for the case where our base USD decimals is 6, and the asset being priced has 10 decimals

Testing?

test_usd_price_decimal_aware All other tests are broken and will be fixed in a following PR on the stack

Screenshots (optional)

[JuaniRios]

• #269 : 3 dependent PRs (#270 , #271 , #272 )
• #268
• #267
• #266
• #265
• #264
• #263
• #262
• #260 👈
• main

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