@firefly-exchange/library-sui
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Sui library housing helper methods, classes to interact with Bluefin protocol(s) deployed on Sui
92 lines (91 loc) • 4.14 kB
JavaScript
;
/**
* This file incorporates code from cetus-clmm-sui-sdk by CetusProtocol,
* licensed under the Apache License 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
* which can be found at https://github.com/CetusProtocol/cetus-clmm-sui-sdk/blob/main/LICENSE
*/
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.getUpperSqrtPriceFromCoinB = exports.getLowerSqrtPriceFromCoinB = exports.getUpperSqrtPriceFromCoinA = exports.getLowerSqrtPriceFromCoinA = exports.SwapUtils = void 0;
const bn_js_1 = __importDefault(require("bn.js"));
const utils_1 = require("./utils");
const constants_1 = require("./constants");
class SwapUtils {
/**
* Retrieves the default sqrt price limit for a swap operation.
*
* @param a2b - Set to true for an A to B swap, or false for a B to A swap.
* @returns The default sqrt price limit for the specified swap direction.
*/
static getDefaultSqrtPriceLimit(a2b) {
return new bn_js_1.default(a2b ? constants_1.MIN_SQRT_PRICE : constants_1.MAX_SQRT_PRICE);
}
/**
* Retrieves the default values for the otherAmountThreshold parameter in a swap.
*
* @param amountSpecifiedIsInput - Indicates the direction of the swap.
* @returns The default values for the otherAmountThreshold in the swap.
*/
static getDefaultOtherAmountThreshold(amountSpecifiedIsInput) {
return amountSpecifiedIsInput ? utils_1.ZERO : utils_1.U64_MAX;
}
}
exports.SwapUtils = SwapUtils;
/**
* Calculates the lower sqrt price based on the amount of token A.
*
* @param amount - The amount of tokens the user wants to swap.
* @param liquidity - The current pool liquidity.
* @param sqrtPriceX64 - The pool's current sqrt price.
* @returns The calculated lower sqrt price (LowesqrtPriceX64).
*/
function getLowerSqrtPriceFromCoinA(amount, liquidity, sqrtPriceX64) {
const numerator = liquidity.mul(sqrtPriceX64).shln(64);
const denominator = liquidity.shln(64).add(amount.mul(sqrtPriceX64));
// always round up
return utils_1.MathUtil.divRoundUp(numerator, denominator);
}
exports.getLowerSqrtPriceFromCoinA = getLowerSqrtPriceFromCoinA;
/**
* Calculates the upper sqrt price based on the amount of token A.
*
* @param amount - The amount of tokens the user wants to swap.
* @param liquidity - The current pool liquidity.
* @param sqrtPriceX64 - The pool's current sqrt price.
* @returns The calculated upper sqrt price (UpperSqrtPriceX64).
*/
function getUpperSqrtPriceFromCoinA(amount, liquidity, sqrtPriceX64) {
const numerator = liquidity.mul(sqrtPriceX64).shln(64);
const denominator = liquidity.shln(64).sub(amount.mul(sqrtPriceX64));
// always round up
return utils_1.MathUtil.divRoundUp(numerator, denominator);
}
exports.getUpperSqrtPriceFromCoinA = getUpperSqrtPriceFromCoinA;
/**
* Calculates the lower sqrt price based on the amount of coin B.
*
* @param amount - The amount of coins the user wants to swap.
* @param liquidity - The current pool liquidity.
* @param sqrtPriceX64 - The pool's current sqrt price.
* @returns The calculated lower sqrt price (LowerSqrtPriceX64).
*/
function getLowerSqrtPriceFromCoinB(amount, liquidity, sqrtPriceX64) {
// always round down(rounding up a negative number)
return sqrtPriceX64.sub(utils_1.MathUtil.divRoundUp(amount.shln(64), liquidity));
}
exports.getLowerSqrtPriceFromCoinB = getLowerSqrtPriceFromCoinB;
/**
* Calculates the upper sqrt price based on the amount of coin B.
*
* @param amount - The amount of coins the user wants to swap.
* @param liquidity - The current pool liquidity.
* @param sqrtPriceX64 - The pool's current sqrt price.
* @returns The calculated upper sqrt price (UpperSqrtPriceX64).
*/
function getUpperSqrtPriceFromCoinB(amount, liquidity, sqrtPriceX64) {
// always round down (rounding up a negative number)
return sqrtPriceX64.add(amount.shln(64).div(liquidity));
}
exports.getUpperSqrtPriceFromCoinB = getUpperSqrtPriceFromCoinB;