Merge pull request #64 from Premian-Labs/issue/parse-number

Issue/parse number

package.json

@@ -1,6 +1,6 @@
 {
 	"name": "@premia/v3-sdk",
-	"version": "1.0.7",
+	"version": "1.0.8",
 	"description": "The official SDK for building applications on Premia V3.",
 	"main": "dist/index.js",
 	"typings": "dist/index.d.ts",

src/api/optionAPI.ts

@@ -128,20 +128,33 @@ export class OptionAPI extends BaseAPI {
 	}
 
 	/**
-	 * Calculates the increment to use for strike prices based on the spot price.
+	 * Calculates the increment to use for strike prices based on the spot (or reference) price.
 	 *
-	 * @param {BigNumberish} spotPrice - The spot price.
+	 * @param {BigNumberish} spotPrice - The spot (or reference) price.
 	 * @param {number} decimals - The number of decimal places for the price (defaults to WAD_DECIMALS).
 	 * @returns {bigint} - The increment for the strike prices.
 	 */
 	getStrikeIncrement(
 		spotPrice: BigNumberish,
-		decimals: number = Number(WAD_DECIMALS)
+		decimals: number | bigint = WAD_DECIMALS
 	): bigint {
-		const price = parseNumber(spotPrice, decimals)
+		const _decimals = Number(decimals)
+		const price = parseNumber(spotPrice, _decimals)
 		const exponent = Math.floor(Math.log10(price))
 		const multiplier = price >= 5 * 10 ** exponent ? 5 : 1
-		return parseBigInt(multiplier * 10 ** (exponent - 1), decimals)
+
+		if (exponent - 1 < 0) {
+			return (
+				(toBigInt(multiplier) * toBigInt(10) ** toBigInt(decimals)) /
+				toBigInt(10) ** toBigInt(Math.abs(exponent - 1))
+			)
+		}
+
+		return (
+			toBigInt(multiplier) *
+			toBigInt(10) ** toBigInt(decimals) *
+			toBigInt(10) ** toBigInt(exponent - 1)
+		)
 	}
 
 	/**

src/utils/parse.ts

@@ -52,7 +52,7 @@ export function parseNumber(
 	decimals: number = Number(WAD_DECIMALS)
 ): number {
 	const isNegative = bn.toString().startsWith('-')
-	const str = bn.toString().replace('-', '')
+	const str = String(toFixed(bn)).replace('-', '')
 	const left =
 		str.length >= decimals ? str.substring(0, str.length - decimals) : 0