Add function assertions required for staking rewards fuzzing: withdrawDelegatorRewards, finalizePool, and endEpoch. Also adds payProtocolFee-related assertions to fillOrder

contracts/test-utils/src/number_utils.ts

@@ -5,6 +5,19 @@ import * as crypto from 'crypto';
 import { expect } from './chai_setup';
 import { constants } from './constants';
 import { Numberish } from './types';
+import { Decimal } from 'decimal.js';
+
+Decimal.set({ precision: 80 });
+
+/**
+ * Convert `x` to a `Decimal` type.
+ */
+export function toDecimal(x: Numberish): Decimal {
+    if (BigNumber.isBigNumber(x)) {
+        return new Decimal(x.toString(10));
+    }
+    return new Decimal(x);
+}
 
 /**
  * Generate a random integer between `min` and `max`, inclusive.
@@ -33,6 +46,22 @@ export function getRandomFloat(min: Numberish, max: Numberish): BigNumber {
         .plus(min);
 }
 
+export const FIXED_POINT_BASE = new BigNumber(2).pow(127);
+
+/**
+ * Convert `n` to fixed-point integer represenatation.
+ */
+export function toFixed(n: Numberish): BigNumber {
+    return new BigNumber(n).times(FIXED_POINT_BASE).integerValue();
+}
+
+/**
+ * Convert `n` from fixed-point integer represenatation.
+ */
+export function fromFixed(n: Numberish): BigNumber {
+    return new BigNumber(n).dividedBy(FIXED_POINT_BASE);
+}
+
 /**
  * Converts two decimal numbers to integers with `precision` digits, then returns
  * the absolute difference.