batchARC.go

// Copyright 2018 The Moov Authors
// Use of this source code is governed by an Apache License
// license that can be found in the LICENSE file.

package ach

// BatchARC holds the BatchHeader and BatchControl and all EntryDetail for ARC Entries.
//
// Accounts Receivable Entry (ARC). A consumer check converted to a one-time ACH debit.
// The Accounts Receivable (ARC) Entry provides billers the opportunity to initiate single-entry ACH
// debits to customer accounts by converting checks at the point of receipt through the U.S. mail, at
// a drop box location or in-person for payment of a bill at a manned location. The biller is required
// to provide the customer with notice prior to the acceptance of the check that states the receipt of
// the customer’s check will be deemed as the authorization for an ARC debit entry to the customer’s
// account. The provision of the notice and the receipt of the check together constitute authorization
// for the ARC entry. The customer’s check is solely be used as a source document to obtain the routing
// number, account number and check serial number.
//
// The difference between ARC and POP is that ARC can result from a check mailed in whereas POP is in-person.
type BatchARC struct {
	Batch
}

// NewBatchARC returns a *BatchARC
func NewBatchARC(bh *BatchHeader) *BatchARC {
	batch := new(BatchARC)
	batch.SetControl(NewBatchControl())
	batch.SetHeader(bh)
	return batch
}

// Validate checks properties of the ACH batch to ensure they match NACHA guidelines.
// This includes computing checksums, totals, and sequence orderings.
//
// Validate will never modify the batch.
func (batch *BatchARC) Validate() error {
	// basic verification of the batch before we validate specific rules.
	if err := batch.verify(); err != nil {
		return err
	}
	// Add configuration and type specific validation for this type.

	if batch.Header.StandardEntryClassCode != ARC {
		return batch.Error("StandardEntryClassCode", ErrBatchSECType, ARC)
	}

	// ARC detail entries can only be a debit, ServiceClassCode must allow debits
	switch batch.Header.ServiceClassCode {
	case MixedDebitsAndCredits, CreditsOnly:
		return batch.Error("ServiceClassCode", ErrBatchServiceClassCode, batch.Header.ServiceClassCode)
	}

	for _, entry := range batch.Entries {
		// ARC detail entries must be a debit
		if entry.CreditOrDebit() != "D" {
			return batch.Error("TransactionCode", ErrBatchDebitOnly, entry.TransactionCode)
		}

		// Amount must be 25,000 or less
		if entry.Amount > 2500000 {
			return batch.Error("Amount", NewErrBatchAmount(entry.Amount, 2500000))
		}

		// CheckSerialNumber underlying IdentificationNumber, must be defined
		if entry.IdentificationNumber == "" {
			return batch.Error("CheckSerialNumber", ErrBatchCheckSerialNumber)
		}
		// Verify the TransactionCode is valid for a ServiceClassCode
		if err := batch.ValidTranCodeForServiceClassCode(entry); err != nil {
			return err
		}
		// Verify Addenda* FieldInclusion based on entry.Category and batchHeader.StandardEntryClassCode
		if err := batch.addendaFieldInclusion(entry); err != nil {
			return err
		}
	}
	return nil
}

// Create will tabulate and assemble an ACH batch into a valid state. This includes
// setting any posting dates, sequence numbers, counts, and sums.
//
// Create implementations are free to modify computable fields in a file and should
// call the Batch's Validate() function at the end of their execution.
func (batch *BatchARC) Create() error {
	// generates sequence numbers and batch control
	if err := batch.build(); err != nil {
		return err
	}
	// Additional steps specific to batch type
	// ...

	return batch.Validate()
}