8d5e28f099
`@0x/contracts-staking`: Denominate pool operator shares in parts-per-million. `@0x/contracts-staking`: Update tests for new stake computation and higher precision math. `@0x/contracts-staking`: Add `setCobbDouglasAlpha()` function.
35 lines
1.1 KiB
TypeScript
35 lines
1.1 KiB
TypeScript
import { expect } from '@0x/contracts-test-utils';
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import { BigNumber } from '@0x/utils';
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import { Decimal } from 'decimal.js';
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Decimal.set({ precision: 80 });
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export type Numberish = BigNumber | string | number;
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/**
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* Converts two decimal numbers to integers with `precision` digits, then returns
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* the absolute difference.
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*/
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export function getNumericalDivergence(a: Numberish, b: Numberish, precision: number = 18): number {
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const _toInteger = (n: Numberish) => {
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const _n = new BigNumber(n);
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const integerDigits = _n.integerValue().sd(true);
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const base = 10 ** (precision - integerDigits);
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return _n.times(base).integerValue(BigNumber.ROUND_DOWN);
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};
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return _toInteger(a)
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.minus(_toInteger(b))
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.abs()
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.toNumber();
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}
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/**
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* Asserts that two numbers are equal up to `precision` digits.
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*/
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export function assertRoughlyEquals(actual: Numberish, expected: Numberish, precision: number = 18): void {
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if (getNumericalDivergence(actual, expected, precision) <= 1) {
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return;
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}
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expect(actual).to.bignumber.eq(expected);
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}
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