`avro-decimal` does not work with latest version of `decimal.js`

[TimShilov]

I've been trying to make example code (https://github.com/ovotech/castle/blob/main/packages/avro-decimal/examples/simple.ts) working and it was throwing an error.

After looking into it it seem that avro-decimal does not work with versions of decimal.js bigger than 10.2.1. Seems like they've changed something in exports and the value no longer recognized as instanceof Decimal. Downgrading it fixes the issue.

Examples:

• Install [email protected]
• Run following code:

import avro from "avsc";
import { AvroDecimal } from "@ovotech/avro-decimal";
import decimal from "decimal.js";

const { Decimal } = decimal;

const decimalSchema = {
    type: "bytes",
    logicalType: "decimal",
    precision: 16,
    scale: 8,
};

export const DecimalType = avro.Type.forSchema(decimalSchema, {
    logicalTypes: { decimal: AvroDecimal },
});

const encoded = DecimalType.toBuffer(new Decimal("100.01"));
const decoded = DecimalType.fromBuffer(encoded);

console.log("decoded", decoded); // output: decoded 100.01

• Install [email protected]
• Run following code (the only difference is import of decimal.js):

import avro from "avsc";
import { AvroDecimal } from "@ovotech/avro-decimal";
import { Decimal } from "decimal.js";

const decimalSchema = {
    type: "bytes",
    logicalType: "decimal",
    precision: 16,
    scale: 8,
};

export const DecimalType = avro.Type.forSchema(decimalSchema, {
    logicalTypes: { decimal: AvroDecimal },
});

const encoded = DecimalType.toBuffer(new Decimal("100.01"));
const decoded = DecimalType.fromBuffer(encoded);

console.log("decoded", decoded);

That throws this error:

/Users/tim.shilov/IdeaProjects/affiliate-etl/node_modules/.pnpm/@[email protected][email protected]/node_modules/@ovotech/avro-decimal/dist/index.js:63
             throw new Error('expecting Decimal type');
                   ^

Error: expecting Decimal type
    at AvroDecimal._toValue (/Users/tim.shilov/IdeaProjects/affiliate-etl/node_modules/.pnpm/@[email protected][email protected]/node_modules/@ovotech/avro-decimal/dist/index.js:63:20)
    at LogicalType._write (/Users/tim.shilov/IdeaProjects/affiliate-etl/node_modules/.pnpm/[email protected]/node_modules/avsc/lib/types.js:2627:40)
    at Type.toBuffer (/Users/tim.shilov/IdeaProjects/affiliate-etl/node_modules/.pnpm/[email protected]/node_modules/avsc/lib/types.js:658:8)
    at file:///Users/tim.shilov/IdeaProjects/affiliate-etl/apps/etl-engine/src/decimal-test.js:16:29
    at ModuleJob.run (node:internal/modules/esm/module_job:222:25)
    at async ModuleLoader.import (node:internal/modules/esm/loader:323:24)
    at async loadESM (node:internal/process/esm_loader:28:7)
    at async handleMainPromise (node:internal/modules/run_main:113:12)

Node.js v20.12.1