@kamino-finance/klend-sdk
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Typescript SDK for interacting with the Kamino Lending (klend) protocol
72 lines • 4 kB
JavaScript
;
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.toOrderIndex = toOrderIndex;
exports.createConditionBasedOrder = createConditionBasedOrder;
exports.readTriggerBasedOrder = readTriggerBasedOrder;
const decimal_js_1 = __importDefault(require("decimal.js"));
const obligationOrder_1 = require("../classes/obligationOrder");
const validations_1 = require("../utils/validations");
const utils_1 = require("../utils");
const common_1 = require("./common");
// These methods are exported, buy only used internally within the obligation orders utils:
function toOrderIndex(orderType) {
switch (orderType) {
case common_1.OrderType.StopLoss:
return 0;
case common_1.OrderType.TakeProfit:
return 1;
}
}
function createConditionBasedOrder(context, condition, specification) {
(0, validations_1.checkThat)(condition.evaluate(context.kaminoObligation) === null, `cannot create an immediately-triggered order`);
const opportunity = toOrderOpportunity(context, specification.action);
const [minExecutionBonusRate, maxExecutionBonusRate] = toExecutionBonusRates(specification.executionBonusBpsRange);
return new obligationOrder_1.KaminoObligationOrder(condition, opportunity, minExecutionBonusRate, maxExecutionBonusRate);
}
function readTriggerBasedOrder(kaminoOrder, trigger) {
return {
trigger,
action: toAction(kaminoOrder.opportunity),
executionBonusBpsRange: toExecutionBonusBps(kaminoOrder.minExecutionBonusRate, kaminoOrder.maxExecutionBonusRate),
};
}
// Only internals below:
function toOrderOpportunity(context, action) {
switch (action.type) {
case common_1.OrderActionType.FullRepay:
return new obligationOrder_1.DeleverageAllDebt();
case common_1.OrderActionType.PartialRepay:
const { repayDebtAmountLamports } = action;
(0, validations_1.checkThat)(repayDebtAmountLamports.gt(0), `repay amount must be positive; got ${repayDebtAmountLamports}`);
const availableDebtAmountLamports = (0, validations_1.getSingleElement)(context.kaminoObligation.getBorrows(), 'borrow').amount;
(0, validations_1.checkThat)(repayDebtAmountLamports.lte(availableDebtAmountLamports), `partial repay amount ${repayDebtAmountLamports} cannot exceed the borrowed amount ${availableDebtAmountLamports}`);
return new obligationOrder_1.DeleverageDebtAmount(action.repayDebtAmountLamports);
}
}
function toExecutionBonusRates(executionBonusBpsRange) {
const [minExecutionBonusRate, maxExecutionBonusRate] = executionBonusBpsRange.map((bps) => new decimal_js_1.default(bps).div(utils_1.ONE_HUNDRED_PCT_IN_BPS));
(0, validations_1.checkThat)(minExecutionBonusRate.gte(0), `execution bonus rate cannot be negative: ${minExecutionBonusRate}`);
(0, validations_1.checkThat)(maxExecutionBonusRate.gte(minExecutionBonusRate), `max execution bonus rate ${maxExecutionBonusRate} cannot be lower than min ${minExecutionBonusRate}`);
return [minExecutionBonusRate, maxExecutionBonusRate];
}
function toAction(opportunity) {
if (opportunity instanceof obligationOrder_1.DeleverageAllDebt) {
return {
type: common_1.OrderActionType.FullRepay,
};
}
if (opportunity instanceof obligationOrder_1.DeleverageDebtAmount) {
return {
type: common_1.OrderActionType.PartialRepay,
repayDebtAmountLamports: opportunity.amount,
};
}
throw new Error(`incompatible on-chain opportunity ${opportunity.constructor.name}`);
}
function toExecutionBonusBps(minExecutionBonusRate, maxExecutionBonusRate) {
return [minExecutionBonusRate, maxExecutionBonusRate].map((rate) => new decimal_js_1.default(rate).mul(utils_1.ONE_HUNDRED_PCT_IN_BPS).toNumber());
}
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