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bitcore-node-zcash/docs/errors.md

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Errors

Many times there are cases where an error condition can be gracefully handled depending on a particular use. To assist in better error handling, errors will have different types so that it's possible to determine the type of error and handle appropriatly.

node.services.address.getUnspentOutputs('00000000839a8...', function(err, outputs) {

  if (err instanceof errors.NoOutputs) {
    // the address hasn't received any transactions
  }

  // otherwise the address has outputs (which may be unspent/spent)

});

For more information about different types of errors, please see lib/errors.js.