91 lines
1.9 KiB
TypeScript
91 lines
1.9 KiB
TypeScript
import Decimal from 'decimal.js';
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export function validateTokensInput(input: string | number, decimal_point = 12) {
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let inputVal = input;
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if (typeof inputVal === 'number') {
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inputVal = inputVal.toString();
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}
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if (inputVal === '') {
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return {
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valid: false,
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error: 'Invalid input',
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};
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}
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inputVal = inputVal.replace(/[^0-9.,]/g, '');
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const MAX_NUMBER = new Decimal(2).pow(64).minus(1);
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if (decimal_point < 0 || decimal_point > 18) {
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return {
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valid: false,
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error: 'Invalid decimal point',
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};
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}
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const dotInput = inputVal.replace(/,/g, '');
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const decimalDevider = new Decimal(10).pow(decimal_point);
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const maxAllowedNumber = MAX_NUMBER.div(decimalDevider);
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const minAllowedNumber = new Decimal(1).div(decimalDevider);
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const rounded = (() => {
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if (dotInput.replace('.', '').length > 20) {
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const decimalParts = dotInput.split('.');
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if (decimalParts.length === 2 && decimalParts[1].length > 1) {
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const beforeDotLength = decimalParts[0].length;
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const roundedInput = new Decimal(dotInput).toFixed(
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Math.max(20 - beforeDotLength, 0),
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);
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if (roundedInput.replace(/./g, '').length <= 20) {
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return roundedInput;
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}
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}
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return false;
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}
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return dotInput;
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})();
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const decimalsAmount = dotInput.split('.')[1]?.length || 0;
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if (decimalsAmount > decimal_point) {
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return {
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valid: false,
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error: 'Invalid amount - too many decimal points',
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};
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}
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if (rounded === false) {
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return {
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valid: false,
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error: 'Invalid amount - number is too big or has too many decimal points',
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};
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}
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const dotInputDecimal = new Decimal(rounded);
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if (dotInputDecimal.gt(maxAllowedNumber)) {
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return {
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valid: false,
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error: 'Invalid amount - number is too big',
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};
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}
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if (dotInputDecimal.lt(minAllowedNumber)) {
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return {
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valid: false,
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error: 'Invalid amount - number is too small',
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};
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}
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return {
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valid: true,
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};
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}
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