Implement genesis liquidity protocol (#545)

* add genesis liquidity implementation

* add missing deposit event

* fix CI issues

* minor fixes

* make math safer

* fix fmt

* make remove liquidity an authorized call

* implement setting initial values for coins

* add genesis liquidity test & misc fixes

* updato develop latest

* fix rotation test

* Finish merging develop

* Remove accidentally committed ETH files

* fix pr comments

* further bug fixes

* fix last pr comments

* tidy up

* Misc

---------

Co-authored-by: Luke Parker <lukeparker5132@gmail.com>

substrate/primitives/src/constants.rs

@@ -0,0 +1,29 @@
+use crate::BlockNumber;
+
+// 1 MB
+pub const BLOCK_SIZE: u32 = 1024 * 1024;
+// 6 seconds
+pub const TARGET_BLOCK_TIME: u64 = 6;
+
+/// Measured in blocks.
+pub const MINUTES: BlockNumber = 60 / TARGET_BLOCK_TIME;
+pub const HOURS: BlockNumber = MINUTES * 60;
+pub const DAYS: BlockNumber = HOURS * 24;
+pub const WEEKS: BlockNumber = DAYS * 7;
+pub const MONTHS: BlockNumber = WEEKS * 4;
+
+/// 6 months of blocks
+pub const GENESIS_SRI_TRICKLE_FEED: u64 = MONTHS * 6;
+
+// 100 Million SRI
+pub const GENESIS_SRI: u64 = 100_000_000 * 10_u64.pow(8);
+
+/// This needs to be long enough for arbitrage to occur and make holding any fake price up
+/// sufficiently unrealistic.
+#[allow(clippy::cast_possible_truncation)]
+pub const ARBITRAGE_TIME: u16 = (2 * HOURS) as u16;
+
+/// Since we use the median price, double the window length.
+///
+/// We additionally +1 so there is a true median.
+pub const MEDIAN_PRICE_WINDOW_LENGTH: u16 = (2 * ARBITRAGE_TIME) + 1;

substrate/primitives/src/lib.rs

@@ -37,6 +37,9 @@ pub use balance::*;
 mod account;
 pub use account::*;
 
+mod constants;
+pub use constants::*;
+
 pub type BlockNumber = u64;
 pub type Header = sp_runtime::generic::Header<BlockNumber, sp_runtime::traits::BlakeTwo256>;