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fix: use AH totalIssuance for APY, filter tiny-stake validator outliers

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Kurdistan Tech Ministry
2026-02-18 06:13:31 +03:00
parent b4e765ee50
commit f717173d3d
1 changed files with 7 additions and 11 deletions
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src/mappings/PoolStakers.ts
+7 -11
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@@ -168,16 +168,9 @@ function calculateYearlyInflation(stakedPortion: number): number {
}
async function computeAndSaveAPY(): Promise<void> {
// Total issuance must come from the relay chain (200M+ HEZ), not AH (7M HEZ).
// AH's balances.totalIssuance only reflects tokens teleported to AH.
// We use staking.erasTotalStake as a proxy: totalStaked is known, and we
// can derive totalIssuance from relay's staking.erasValidatorReward ratio.
// But simplest: read relay's totalIssuance via the staking pallet's
// erasValidatorReward / erasRewardPoints to approximate, OR use a known
// total supply constant.
//
// Pezkuwi total supply ~200M HEZ. For accurate APY we use this.
const TOTAL_SUPPLY = BigInt("200004200000000000000"); // ~200M HEZ in planck
// Use AH's own totalIssuance. AH staking pallet mints inflation from AH supply.
const TOTAL_SUPPLY = ((await api.query.balances.totalIssuance()) as any).toBigInt();
if (TOTAL_SUPPLY === BigInt(0)) return;
const activeEraOpt = (await api.query.staking.activeEra()) as Option<any>;
if (activeEraOpt.isNone) return;
@@ -214,9 +207,12 @@ async function computeAndSaveAPY(): Promise<void> {
const avgRewardPct = yearlyInflation / stakedPortion;
const avgStake = totalStaked / BigInt(validators.length);
// Compute per-validator APY, then take the max of validators with
// at least 10% of average stake (filters out tiny-stake outliers)
const minStake = avgStake / BigInt(10);
let maxAPY = 0;
for (const v of validators) {
if (v.totalStake === BigInt(0)) continue;
if (v.totalStake < minStake) continue;
const stakeRatio = Number((avgStake * SCALE) / v.totalStake) / Number(SCALE);
const apy = avgRewardPct * stakeRatio * (1 - v.commission);
if (apy > maxAPY) maxAPY = apy;