Special error types

[andreyddk]

Describe the Feature

I face with the problem when I trying to handle error exceptions. Because the ethers does not have any types or dto for errors. Its right here https://github.com/ethers-io/ethers.js/blob/master/packages/logger/src.ts/index.ts#L269

I think the error types will get simply

Code Example

export class TransactionError extends Error {
  readonly reason: string;

  constructor(message: string) {
    super(message)

    this.reason = message;

    this.name = this.constructor.name;
  }
}

try {
  await transaction.wait(2);
} catch (error) {
  if (error instanceof TransactionError) {
    // Some logic
  }
}

[ricmoo]

Ethers uses error codes, which allow machine-readable errors.

This is better in v6, which uses conditional types to enforce and expose properties on normal Error objects. The isError function helps refine error properties too without the problems associated with sun-classing Error. :)