From 58b379abeeaa562ce8c19e8d3ff257dd9c6a8202 Mon Sep 17 00:00:00 2001
From: Xavier Lau <xavier@inv.cafe>
Date: Tue, 28 Nov 2023 13:04:01 +0800
Subject: [PATCH] DIP-0 (#5)

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+---
+dip: 0
+title: Staking Power Specification
+description: This specification details the functioning of staking power.
+authors: Darwinia Network (@AurevoirXavier, @hackfisher)
+discussions-to: None
+status: Final
+type: Economic
+created: 2023-11-28
+---
+
+
+## Abstract
+This DIP explicates the staking power specification applicable to Darwinia and Crab.
+
+
+## Rationale
+Darwinia's initial design recognizes the existence of two tokens.
+To incorporate these two tokens in staking, a unified measuring unit is indispensable.
+
+
+## Specification
+Power is a composite unit of RINGs and KTONs.
+
+There is a constant total of `1` billion power, with `50%` allocated to RINGs and `50%` to KTONs.
+
+A RING pool exists, where all staked RINGs are held to share the `50%` power. The same applies to the KTON pool.
+
+```rs
+const TOTAL_POWER: u32 = 1_000_000_000;
+const HALF_POWER: u32 = TOTAL_POWER / 2;
+
+// Initially, there are no stakers.
+static mut ring_pool = 0;
+static mut kton_pool = 0;
+
+// The power of a staker is the sum of their RINGs' power and their KTONs' power.
+fn power_of(staker) {
+	(staker.ring / ring_pool  + staker.kton / kton_pool) * HALF_POWER
+}
+
+// Staker `S1` stakes `25` RINGs.
+ring_pool += 25; // , which becomes `25`.
+assert_eq!(power_of(S1), HALF_POWER);
+
+// Staker `S1` stakes `25` KTONs.
+kton_pool += 25; // , which becomes `25`;
+assert_eq!(power_of(S1), TOTAL_POWER);
+
+// Staker `S2` stakes `75` RINGs.
+ring_pool += 75; // , which becomes `100`.
+assert_eq!(power_of(S1), 25 / 100 * HALF_POWER + HALF_POWER);
+assert_eq!(power_of(S2), 75 / 100 * HALF_POWER);
+
+// Staker `S2` stakes `25` KTONs.
+kton_pool += 25; // , which becomes `50`.
+assert_eq!(power_of(S1), 25 / 100 * HALF_POWER + 25 / 50 * HALF_POWER);
+assert_eq!(power_of(S2), 75 / 100 * HALF_POWER + 25 / 50 * HALF_POWER);
+```
+
+
+## Copyright
+Copyright and related rights waived via [CC0](../LICENSE).