@alcorexchange/alcor-swap-sdk/test/priceTickConversions.test.ts

## Installation ​​ **npm** ``` npm i @alcorexchange/alcor-swap-sdk ``` **yarn** ``` yarn add @alcorexchange/alcor-swap-sdk ``` ## Usage ### Import:

import { Token } from "entities/token";
import { Price } from "entities/fractions/price";
import { priceToClosestTick, tickToPrice } from "utils/priceTickConversions";

describe("priceTickConversions", () => {
  const token0 = new Token("contracta", 18, "ABC");
  const token1 = new Token("contractb", 18, "BCD");
  const token2_6decimals = new Token("contractc", 6, "EFG");

  describe("#tickToPrice", () => {
    it("1800 t0/1 t1", () => {
      expect(tickToPrice(token1, token0, -74959).toSignificant(5)).toEqual(
        "1800"
      );
    });

    it("1 t1/1800 t0", () => {
      expect(tickToPrice(token0, token1, -74959).toSignificant(5)).toEqual(
        "0.00055556"
      );
    });

    it("1800 t1/1 t0", () => {
      expect(tickToPrice(token0, token1, 74959).toSignificant(5)).toEqual(
        "1800"
      );
    });

    it("1 t0/1800 t1", () => {
      expect(tickToPrice(token1, token0, 74959).toSignificant(5)).toEqual(
        "0.00055556"
      );
    });

    describe("12 decimal difference", () => {
      it("1.01 t2/1 t0", () => {
        expect(
          tickToPrice(token0, token2_6decimals, -276225).toSignificant(5)
        ).toEqual("1.01");
      });

      it("1 t0/1.01 t2", () => {
        expect(
          tickToPrice(token2_6decimals, token0, -276225).toSignificant(5)
        ).toEqual("0.99015");
      });

      it("1 t2/1.01 t0", () => {
        expect(
          tickToPrice(token0, token2_6decimals, -276423).toSignificant(5)
        ).toEqual("0.99015");
      });

      it("1.01 t0/1 t2", () => {
        expect(
          tickToPrice(token2_6decimals, token0, -276423).toSignificant(5)
        ).toEqual("1.0099");
      });

      it("1.01 t2/1 t0", () => {
        expect(
          tickToPrice(token0, token2_6decimals, -276225).toSignificant(5)
        ).toEqual("1.01");
      });

      it("1 t0/1.01 t2", () => {
        expect(
          tickToPrice(token2_6decimals, token0, -276225).toSignificant(5)
        ).toEqual("0.99015");
      });
    });
  });

  describe("#priceToClosestTick", () => {
    it("1800 t0/1 t1", () => {
      expect(priceToClosestTick(new Price(token1, token0, 1, 1800))).toEqual(
        -74960
      );
    });

    it("1 t1/1800 t0", () => {
      expect(priceToClosestTick(new Price(token0, token1, 1800, 1))).toEqual(
        -74960
      );
    });

    it("1.01 t2/1 t0", () => {
      expect(
        priceToClosestTick(new Price(token0, token2_6decimals, 100e18, 101e6))
      ).toEqual(-276225);
    });

    it("1 t0/1.01 t2", () => {
      expect(
        priceToClosestTick(new Price(token2_6decimals, token0, 101e6, 100e18))
      ).toEqual(-276225);
    });

    describe("reciprocal with tickToPrice", () => {
      it("1800 t0/1 t1", () => {
        expect(priceToClosestTick(tickToPrice(token1, token0, -74960))).toEqual(
          -74960
        );
      });

      it("1 t0/1800 t1", () => {
        expect(priceToClosestTick(tickToPrice(token1, token0, 74960))).toEqual(
          74960
        );
      });

      it("1 t1/1800 t0", () => {
        expect(priceToClosestTick(tickToPrice(token0, token1, -74960))).toEqual(
          -74960
        );
      });

      it("1800 t1/1 t0", () => {
        expect(priceToClosestTick(tickToPrice(token0, token1, 74960))).toEqual(
          74960
        );
      });

      it("1.01 t2/1 t0", () => {
        expect(
          priceToClosestTick(tickToPrice(token0, token2_6decimals, -276225))
        ).toEqual(-276225);
      });

      it("1 t0/1.01 t2", () => {
        expect(
          priceToClosestTick(tickToPrice(token2_6decimals, token0, -276225))
        ).toEqual(-276225);
      });
    });
  });
});