@drift-labs/sdk
Version:
SDK for Drift Protocol
75 lines (74 loc) • 3.42 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.unstakeSharesToAmountWithOpenRequest = exports.unstakeSharesToAmount = exports.stakeAmountToShares = exports.nextRevenuePoolSettleApr = void 0;
const numericConstants_1 = require("../constants/numericConstants");
const spotBalance_1 = require("../math/spotBalance");
const anchor_1 = require("@coral-xyz/anchor");
const types_1 = require("../types");
function nextRevenuePoolSettleApr(spotMarket, vaultBalance, // vault token amount
amount // delta token amount
) {
const MAX_APR = new anchor_1.BN(10).mul(numericConstants_1.PERCENTAGE_PRECISION); // 1000% APR
// Conmputing the APR:
const revenuePoolBN = (0, spotBalance_1.getTokenAmount)(spotMarket.revenuePool.scaledBalance, spotMarket, types_1.SpotBalanceType.DEPOSIT);
const payoutRatio = 0.1;
const ratioForStakers = spotMarket.insuranceFund.totalFactor > 0 &&
spotMarket.insuranceFund.userFactor > 0 &&
spotMarket.insuranceFund.revenueSettlePeriod.gt(numericConstants_1.ZERO)
? spotMarket.insuranceFund.userFactor /
spotMarket.insuranceFund.totalFactor
: 0;
// Settle periods from on-chain data:
const revSettlePeriod = spotMarket.insuranceFund.revenueSettlePeriod.toNumber() * 1000;
const settlesPerYear = 31536000000 / revSettlePeriod;
const projectedAnnualRev = revenuePoolBN
.muln(settlesPerYear)
.muln(payoutRatio);
const uncappedApr = vaultBalance.add(amount).eq(numericConstants_1.ZERO)
? 0
: projectedAnnualRev.muln(1000).div(vaultBalance.add(amount)).toNumber() *
100 *
1000;
const cappedApr = Math.min(uncappedApr, MAX_APR.toNumber());
const nextApr = cappedApr * ratioForStakers;
return nextApr;
}
exports.nextRevenuePoolSettleApr = nextRevenuePoolSettleApr;
function stakeAmountToShares(amount, totalIfShares, insuranceFundVaultBalance) {
let nShares;
if (insuranceFundVaultBalance.gt(numericConstants_1.ZERO)) {
nShares = amount.mul(totalIfShares).div(insuranceFundVaultBalance);
}
else {
nShares = amount;
}
return nShares;
}
exports.stakeAmountToShares = stakeAmountToShares;
function unstakeSharesToAmount(nShares, totalIfShares, insuranceFundVaultBalance) {
let amount;
if (totalIfShares.gt(numericConstants_1.ZERO)) {
amount = anchor_1.BN.max(numericConstants_1.ZERO, nShares.mul(insuranceFundVaultBalance).div(totalIfShares));
}
else {
amount = numericConstants_1.ZERO;
}
return amount;
}
exports.unstakeSharesToAmount = unstakeSharesToAmount;
function unstakeSharesToAmountWithOpenRequest(nShares, withdrawRequestShares, withdrawRequestAmount, totalIfShares, insuranceFundVaultBalance) {
let stakedAmount;
if (totalIfShares.gt(numericConstants_1.ZERO)) {
stakedAmount = anchor_1.BN.max(numericConstants_1.ZERO, nShares
.sub(withdrawRequestShares)
.mul(insuranceFundVaultBalance)
.div(totalIfShares));
}
else {
stakedAmount = numericConstants_1.ZERO;
}
const withdrawAmount = anchor_1.BN.min(withdrawRequestAmount, withdrawRequestShares.mul(insuranceFundVaultBalance).div(totalIfShares));
const amount = withdrawAmount.add(stakedAmount);
return amount;
}
exports.unstakeSharesToAmountWithOpenRequest = unstakeSharesToAmountWithOpenRequest;