Initial commit

src/utils/normalizeNumber.ts

@@ -0,0 +1,25 @@
+import BigNumber from 'bignumber.js';
+import { ethers } from 'ethers';
+
+/**
+ * Converts denormalized ("human-readable") number to normalized ("machine-readable") number.
+ * @param input Any numeric value
+ * @param decimals Blockchain asset precision
+ * @param roundingMode Rounding mode
+ * @returns ethers.BigNumber
+ */
+export default function normalizeNumber(
+  input: BigNumber.Value,
+  decimals: BigNumber.Value,
+  roundingMode: BigNumber.RoundingMode,
+) {
+  const decimalsBN = new BigNumber(decimals);
+  if (!decimalsBN.isInteger()) throw new Error(`Decimals '${decimals.toString()}' is not an integer`);
+  const inputBN = new BigNumber(input);
+  return ethers.BigNumber.from(
+    inputBN
+      .multipliedBy(new BigNumber(10).pow(decimals))
+      .integerValue(roundingMode)
+      .toString(),
+  );
+}