@node-dlc/core/dist/dlc/finance/LinearPayout.js

DLC Core

"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.LinearPayout = void 0;
const messaging_1 = require("@node-dlc/messaging");
const bignumber_js_1 = __importDefault(require("bignumber.js"));
const PolynomialPayoutCurve_1 = require("../PolynomialPayoutCurve");
const buildPayoutFunction = (minPayout, maxPayout, startOutcome, endOutcome, oracleBase, oracleDigits) => {
    // Max outcome limited by the oracle
    const maxOutcome = BigInt(new bignumber_js_1.default(oracleBase).pow(oracleDigits).minus(1).toString(10));
    // max loss line
    const payoutCurveMaxLoss = new PolynomialPayoutCurve_1.PolynomialPayoutCurve([
        { outcome: new bignumber_js_1.default(0), payout: new bignumber_js_1.default(Number(minPayout)) },
        {
            outcome: new bignumber_js_1.default(Number(startOutcome)),
            payout: new bignumber_js_1.default(Number(minPayout)),
        },
    ]);
    // payout line
    const payoutCurve = new PolynomialPayoutCurve_1.PolynomialPayoutCurve([
        {
            outcome: new bignumber_js_1.default(Number(startOutcome)),
            payout: new bignumber_js_1.default(Number(minPayout)),
        },
        {
            outcome: new bignumber_js_1.default(Number(endOutcome)),
            payout: new bignumber_js_1.default(Number(maxPayout)),
        },
    ]);
    // max gain line
    const payoutCurveMaxGain = new PolynomialPayoutCurve_1.PolynomialPayoutCurve([
        { outcome: new bignumber_js_1.default(Number(endOutcome)), payout: new bignumber_js_1.default(Number(maxPayout)) },
        {
            outcome: new bignumber_js_1.default(Number(maxOutcome)),
            payout: new bignumber_js_1.default(Number(maxPayout)),
        },
    ]);
    const payoutFunction = new messaging_1.PayoutFunction();
    // Defensive fix: ensure payoutFunctionPieces is initialized as an array
    if (!payoutFunction.payoutFunctionPieces) {
        payoutFunction.payoutFunctionPieces = [];
    }
    payoutFunction.payoutFunctionPieces.push({
        endPoint: {
            eventOutcome: startOutcome,
            outcomePayout: minPayout,
            extraPrecision: 0,
        },
        payoutCurvePiece: payoutCurveMaxLoss.toPayoutCurvePiece(),
    });
    payoutFunction.payoutFunctionPieces.push({
        endPoint: {
            eventOutcome: endOutcome,
            outcomePayout: maxPayout,
            extraPrecision: 0,
        },
        payoutCurvePiece: payoutCurve.toPayoutCurvePiece(),
    });
    payoutFunction.payoutFunctionPieces.push({
        endPoint: {
            eventOutcome: maxOutcome,
            outcomePayout: maxPayout,
            extraPrecision: 0,
        },
        payoutCurvePiece: payoutCurveMaxGain.toPayoutCurvePiece(),
    });
    payoutFunction.lastEndpoint = {
        eventOutcome: maxOutcome,
        outcomePayout: maxPayout,
        extraPrecision: 0,
    };
    return {
        payoutFunction,
    };
};
exports.LinearPayout = { buildPayoutFunction };
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