# TrustCommerce Developer's Guide 2.3

http://www.trustcommerce.com
developer@trustcommerce.com

March 18, 2003

## Table of Contents

I. Introduction
II. Connecting via TCLink
III. Transaction Types
IV. Input Parameters
V. Return Parameters
VI. Credit Card Preauths and Sales
VII. Card Verification Value (CVV)
VII. Card-Present Transactions
IX. ACH
X. Postauths, Credits, and Chargebacks
XI. TCS Citadel (Billing IDs)
XII. Recurring Billing
XIII. TCS Wallet
XIV. Purchase Level II (Commercial Cards)
XV. Order Detail
XVI. Vault Query API
Appendix A - Test Data
Appendix B - Troubleshooting
Appendix C - Connecting via HTTPS POST
Appendix D - Currency Table
Appendix E - Input Field List

## I. Introduction

This guide covers the TrustCommerce transactional processing API. It is platform- and language-neutral. If you are a developer programming processing functionality to a software package or website, then this guide is for you. If you are connecting via a pre-integrated commerce package, including shopping carts such as StoreForge, Mal's e-Commerce, PDG Cart, or AllCommerce, then you do not need this document.

Definitions of credit card processing terms and information about the Vault website are contained in the TrustCommerce User's Guide, and will not be covered here. If you are not familiar with the basics of credit card processing (such as the difference between an auth and capture), then you should probably read the User's Guide first. The User's Guide also describes use of the Vault website's reporting capabilities, which you may find useful to confirm that your test transactions are working as expected.

There are two methods of connecting to the TrustCommerce gateway at the programming level: the TCLink client software, and an HTTPS POST to the Vault server. TCLink is HIGHLY recommend, as it offers support for TrustCommerce's unique features such as automated failover and enhanced security through server certificate verification. It's available for many platforms and languages, and installation is straightforward, so you should try to use it if possible. If you are unable to use TCLink for whatever reason, the HTTPS POST method will still allow you to access most features of the TrustCommerce processing engine, but be aware that it cannot match the speed and especially the reliability of TCLink.

## II. Connecting via TCLink

The TCLink API is available for download from the Vault website, in the "Downloads" section. Be sure to chose the version that matches the platform and language that you are using. In particular, Win32 developers will probably always want the COM object, which contains support for a number of different languages on the Win32 platform, including ASP, ColdFusion, Perl, PHP, and Python.

Installation instructions specific to the TCLink version you've downloaded can be found in the readme file contained with the archive. It will also contain a version of the TCTest program specific to the language you're using. It's highly recommended that you look over this example, and even use it as the basis for your own code. In fact, you should look over the code sample first to get a feel for the API, then return to reading this document.

Versions of TCLink for high-level languages (including PHP, Perl, Python, and Java) with built in support for hashes only have one method: Send(). This method accepts a single parameter, a hash of input values, and returns a single parameters, a hash of output values. The only other method avaliable is GetVersion(), which returns the version string for TCLink.

TCLink for other languages (including C/C++, Win32 COM, and CFX) contains four basic methods: Create(), PushParam(), Send(), and GetResponse(). C-style TCLink functions are described in the table below.

### TCLink Function Names

Function Name | Description
--- | ---
CreateLink() | Create a new transaction handle.
PushParam() | Push a parameter into the transaction.
Send() | Submit a transaction to the gateway.
GetResponse() | Retrieve a response parameter from the transaction.
GetEntireResponse() | Get the entire response for the transaction, primarily use for debugging or logging.
Destroy() | Deallocate any memory associated with the transaction handle.
GetVersion() | Get the version string for the TCLink API in use.

These four methods map to the four stages of running a transaction: initialize, push a number of parameters describing the transaction, send the transaction to the TrustCommerce gateway for processing, and finally get details about the transaction results.

The only method which contacts the TC servers is Send(). This function will block for one or two seconds while the transaction is processed. Afterward, you can retrieve response parameters at your leisure; they are stored internally in TCLink.

## III. Transaction Types

You may wish to read the section of the TCS User's Guide which describes the transaction types and the authorization/capture process, especially if you are not already familiar with credit card processing.

In terms of parameters passed, preauths and sales are almost identical. They take account data and personal information about the customer, along with a transaction amount. The transaction is authorized and the response values returned. In the case of a sale, the item is also immediately submitted for capture. Preauths are not captured until they are postauthed.

Postauths and credits are also very similar to one another. They indicate a capture or a return of funds for a previous transaction, and no personal data about the customer or their payment method is passed.

There are three other types of transaction. Store and unstore are covered in the Billing ID section of this document. Walletsale is covered under the TCS Wallet section.

## IV. Input Parameters

There are a large number of parameters available for describing transactions. Not all parameters are accepted for all transaction types, and most parameters are optional. Most transactions can be sent with only a few parameters. The only parameters always required are custid, password, and action.

Parameters are carefully checked for format and size before the transaction is sent. If there are any errors in the parameters you've entered, the transaction will be aborted and detailed information about the errors will be returned. These return values are described in more detail in the next section.

The parameters presented in the following tables are used by all transaction types.

### Required Parameters

Parameter Name | Description
--- | ---
amount | Amount of the transaction, in cents. (example: "500" is $5.00)
custid | Your customer ID number assigned to you by TrustCommerce.
password | The password for your custid as assigned by TrustCommerce.
action | The transaction type; can be one of preauth, sale, postauth, credit, store, unstore, walletsale, or chargeback

### Optional Parameters

Parameter Name | Description
--- | ---
amount | Amount of the transaction, in cents. (example: "500" is $5.00)
demo | When set to "y", the transaction will be a test transaction only.
ticket | Free-form text field intended for storing ticket number or order number associated with the transaction, to aid merchants in order tracking and reporting.
operator | Free-form text field intended for recording the operator that entered the transaction, to aid merchants in order track and reporting.

The demo parameter is of particular note for testing. Demo transactions allow you to test your processing system without charging real money to a card, and you will not be charged and transaction fees. They are also flagged separately in the Vault database and will not appear in the regular accounting reports.

On card-not-present transactions, the ticket parameter is passed to the acquiring bank in the settlement process as the "purchase identifier." This may aid in reconciling the TrustCommerce transactions with the deposits made into the merchant bank account. If no ticket is passed, then the TrustCommerce transID will be sent to the bank instead.

## V. Return Parameters

Any transaction sent will return several parameters describing the success or failure of the transaction. Properly formatted transactions will always return a transaction ID (or "transID') this is the unique identifier for this transaction, and can be used to retrieve the transaction from the Vault website, or otherwise access the transaction in the future. (For example, in order to credit a previous transaction, you will need to send the transID of said transaction.)

Transactions also always return a status parameter which describes the success or failure of the transaction. Status can be set to one of the following:

### Status

Status Value | Description
--- | ---
approved | The transaction was successfully authorized.
accepted | The transaction has been successfully accepted into the system.
decline | The transaction was declined, see declinetype for further details.
baddata | Invalid parameters passed, see error for further details.
error | System error when processing the transaction, see errortype for details.

The difference between approved and accepted is subtle, but important. Approved means that the transaction was an authorization of some sort, and has been successfully cleared with the bank. Accepted only means that the transaction was queued into the system without errors, but may be rejected at some later time. An example of the difference is a sale versus a credit. A sale is a realtime authorization, so it returns approved on success. A credit is not realtime; there is no such thing as a "credit authorization." Instead it is queued up for processing by the bank and there is the small but non-zero posibility that it will be rejected at a later time. In practice, however, this rarely happens, so the developer need not worry unduly.

When status is set to decline, the parameter declinetype will contain one of the following:

### Decline Type

Declinetype Value | Description
--- | ---
decline | This is a "true" decline, it almost always is a result of insufficient funds on the card.
avs | AVS failed; the address entered does not match the billing address on file at the bank.
cvv | CVV failed; the number provided is not the correct verification number for the card. (See section X for details on CVV.)
call | The card must be authorized manually over the phone. You may choose to call the customer service number listed on the card and ask for an offline authcode, which can be passed in the offlineauthcode field.
carderror | Card number is invalid, usually the result of a typo in the card number.
authexpired | Attempt to postauth an expired (more than 7 days old) preauth.
dailylimit | Daily limit in transaction count or amount as been reached.
weeklylimit | Weekly limit in transaction count or amount as been reached.
monthlylimit | Monthly limit in transaction count or amount as been reached.

A status of baddata indicates that no transaction was attempted because one or more parameters was invalid. In this case, the parameter error will indicate the problem, and the offenders parameter will list the offending input fields. The error parameter may be set to one of the following:

### Bad Data

Error Value | Description
--- | ---
missingfields | Some parameters required for this transaction type were not sent.
extrafields | Parameters not allowed for this transaction type were sent.
badformat | A field was improperly formatted, such as non-digit characters in a number field.
badlength | A field was longer or shorter than the server allows.
merchantcantaccept | The merchant can't accept data passed in this field. If the offender is "cc", for example, it usually means that you tried to run a card type (such as American Express or Discover) that is not supported by your account. If it was "currency", you tried to run a currency type not supported by your account.
mismatch | Data in one of the offending fields did not cross-check with the other offending field.

A status of error indicates the an error occurred while processing the transaction. These are almost always networking errors; see the Troubleshooting section for more. If the status is error, then the errortype parameter will be set to one of the following:

### Error

Errortype Value | Description
--- | ---
cantconnect | Couldn't connect to the TrustCommerce gateway. Check your Internet connection to make sure it is up.
dnsfailure | The TCLink software was unable to resolve DNS hostnames. Make sure you have name resolving ability on the machine.
linkfailure | The connection was established, but was severed before the transaction could complete.
failtoprocess | The bank servers are offline and unable to authorize transactions. Try again in a few minutes, or try a card from a different issuing bank.

Other parameters (such as avs or billingid) may be returned by the transaction depending on the action; see sections covering the transaction type you're running for detailed information on the specialized return values.

## VI. Credit Card Preauths and Sales

The 'preauth' and 'sale' actions are identical in terms of parameters and function. The only difference is that a sale submits the item for capture as well, while preauths run the authorization only and can be postauthed at another time.

The parameters that can be passed with these action types are described in the following two tables. The first table list required fields that you must pass in order to send the transaction. The second table lists optional fields that you can pass if you wish, but are not required.

### Required Parameters

Parameter Name | Description
--- | ---
amount | Amount of the transaction, in cents. (example: "500" is $5.00)
cc | Credit card number, digits only (no spaces or dashes)
exp | Credit card expiration date, in MMYY format

### Optional Parameters

Parameter Name | Default Value | Description
--- | --- | ---
media | cc | "cc" for credit card or "ach" for ACH.
currency | usd | Currency code (see section X for the table of codes)
avs | n | AVS requested, "y" or "n" (see notes below).
name |  | Cardholder's name.
address1 |  | First line of cardholder's street address.
address2 |  | Second line of cardholder's street address.
city |  | Cardholder's city.
state |  | Two-character code for the cardholder's state, or the full region/province for international addresses.
zip |  | Cardholder's zipcode, five or nine digits with no spaces or dashes, or the full postal code for international addresses.
country |  | Cardholder's country, leave blank for US.
phone |  | Cardholder's phone number.
email |  | Cardholder's email address.
offlineauthcode |  | Six-digit numeric code used to "force" the transaction (see notes below).

A note about AVS: The AVS system is a useful way to help screen for fraud, as it requires that whomever is sending the transaction know the billing address for the card in question. As a merchant, you should know that AVS is not uniformly supported by card issuers; approximately 30% of US-based credit cards will not have AVS capability, and AVS is not available with any non-US cards at all. If avs=y is used, it will attempt to verify the address data with AVS, but if it is unavailable, it will not cause the transaction to fail. Only if AVS is available and the address data does not match will the transaction be declined due to AVS. You may wish to screen AVS results more closely. For this reason, sales and preauths will return the AVS code in a parameter named avs. (This parameter is returned even when avs=n, which is the default.) It returns a single character code, which are enumerated in the table below.

### AVS Returns Codes

Code | Description
--- | ---
X | Exact match, 9 digit zipcode.
Y | Exact match, 5 digit zipcode.
A | Street address match only.
W | 9 digit zipcode match only.
Z | 5 digit zipcode match only.
N | No match on street address or zipcode.
U | AVS unavailable on this card.
G | Non-US card issuer, AVS unavailable.
R | Card issuer system currently down, try again later.
E | Error, ineligible - not a mail/phone order.
S | Service not supported.
0 | General decline or other error.

Only the numeric parts of the address (street address and zipcode) are verified. It should also be noted that oftentimes AVS data is incorrect or not entirely up-to-date, dependent upon the card issuing bank. For these reasons, you should treat AVS as a helpful tool which should be used in combination with other methods (dependent upon your business model) for screening transactions. If you trust AVS too blindly, you may risk losing legitimate sales. Some merchants (again, dependent upon business model) choose to turn AVS off altogether. You should analyze your customer base and make the decision that will work best for your business.

A note on offlineauthcode: Some cards returned a declinetype of call. This indicates that the card cannot be automatically authorized, but if you call the card issuers, they may be able to give you a manual authorization, which will consist of a six-digit auth code. You may then push the transaction through by entering that code into the offlineauthcode field. offlineauthcode can only be used with sale transactions. Be warned: offlineauthcode skips the authorization phase altogether, and thus is not guaranteed in the same way as a normal authorization. Be careful with the use of this parameter.

### Preauth/Sale Example

    	params = {
    		'custid':    'mycustid',
    		'password':  'mypasswd',
    		'action':    'preauth',
    		'amount':    '500',
    		'cc':        '4111111111111111',
    		'exp':       '0404',
    		'name':      'Jennifer Smith',
    		'address1':  '123 Test St.',
    		'city':      'Somewhere',
    		'state':     'CA',
    		'zip':       '90001',
    		'avs':       'y'
    	}

    	result = tclink.send(params)

    	if (result['status'] == 'approved'):
    		print  'Transaction was successful'
    	elif (result['status'] == 'decline'):
    		print 'Transaction declined.  Reason: ', result['declinetype']
    	elif (result['status'] == 'baddata'):
    		print 'Improperly formatted data.  Offending fields: ', result['offenders']
    	else:
    		print 'An error occured: ', result['errortype']

    	print 'Here are the full details:'
    	print result

## VII. Card Verification Value (CVV)

Another method for cardholder verification is the CVV system. Visa cards use what is called a CVV2 code; Mastercards call it CVC2, and American Express calls it CID. CVV2 and CVC2 (Visa/MC) are located on the back of the credit card, printed in ink on the signature strip. The number is the last three digits on the righthand side of the long string of numbers on the strip. In the case of CID (AmEx), the number is a four-digit value located on the front of the card, printed just above the card number on the lefthand side. This value is passed to TCLink through the following parameter.

### CVV Parameters

Parameter Name | Description
--- | ---
cvv | A three or four digit CVV number.

The CVV value will be checked if anything is passed in this parameter. (If you don't include the parameter, no CVV test will be run.) If the CVV matches, the transaction will run as normal. If it does not, you will receive a status of decline, and a declinetype of cvv.

### CVV Example

    	params = {
    		'custid':    'mycustid',
    		'password':  'mypasswd',
    		'action':    'sale',
    		'amount':    '500',
    		'cc':        '4111111111111111',
    		'exp':       '0404',
    		'cvv':       '123'
    	}

    	result = tclink.send(params)

    	if (result['status'] == 'decline')
    		if (result['declinetype'] == 'cvv')
    			print 'The CVV number is not valid.'

## VII. Card-Present Transactions

In a retail environment with a card swiper, you may wish to pass magnetic stripe data along with the other credit card information on a preauth or sale. There are two parameters which you can use to send this data, named track1 and track2. Each one is for a different type of track data, and depends on the type of card reader being used.

### Card-Present Parameters

Parameter Name | Description
--- | ---
track1 | Up to 79 bytes of Track 1 data.
track2 | Up to 40 bytes of Track 2 data.

You can include all data read from the track, but only data between the start sentinel (a '%' character for track1 and a ';' for track2) and the end sentinel ('?') will be used. Everything outside the start and end sentinels (such as the trailing LRC character) will be discarded.

The cc and exp fields may be passed, but are not required, since they will be extracted from the track data. If you do pass one or both of these fields, however, and it does not match the data extracted from the track data, a status of baddata and an error mismatch will be returned.

If both track1 and track2 data are passed, only the system will choose track1 by default for the authorization, and track2 will be discarded.

Generally AVS and address data are not necessary for swiped transactions, but you may pass them anyway if you choose.

### Card Present Example

    	params = {
    		'custid':    'mycustid',
    		'password':  'mypasswd',
    		'action':    'sale',
    		'amount':    '500'
    	}

    	params['track1'] = CardReader.readMagStripe()

    	result = tclink.send(params)

## IX. ACH

ACH, also known as electronic checks, are very different from credit cards in that they allow a direct debit or credit to a checking account. The concept of "authorization" does not exist; it is purely a money transfer. For this reason, the only transaction types available for ACH are sale and credit. ACH credits are identical to all other types of credits in the TrustCommerce system, so please refer to section X for details on issuing credits.

ACH sales take the same parameters as credit card sales, with the exception of the "cc" and "exp" fields. Instead, use the following parameters.

### ACH Parameters

Parameter Name | Description
--- | ---
routing | The routing number of the bank being debited.
account | The account number of the person or business being debited.

AVS is not available for ACH transactions, so the AVS setting is ignored.

There is only one declinetype returned from unsuccessful ACH sales, and that is "decline."

### ACH Example

    	params = {
    		'custid':    'mycustid',
    		'password':  'mypass',
    		'action':    'sale',
    		'media':     'ach',
    		'amount':    '1000',
    		'routing':   '123456789',
    		'account':   '55544433322211'
    	}

    	tclink.send(params)

## X. Postauths, Credits, and Chargebacks

These three transaction types are similar in that they reference a successful transaction previously executed through the TrustCommerce system. No credit card information or other personal information fields will be accepted by this transaction types; there is only one required parameter.

### Required Parameters

Parameter Name | Description
--- | ---
transid | The transaction ID (format: nnn-nnnnnnnnnn) of the referenced transaction.

In addition, postauths and credits can take an optional amount parameter.

### Optional Parameters

Parameter Name | Description
--- | ---
amount | The amount, in cents, to credit or postauth if it is not the same as the original amount.

If no amount is passed, the default will be to take the amount from the original transaction. If, however, you wish to credit or postauthorize less than the original amount, you may pass this parameter.

### Credit Example

    	params = {
    		'custid':    'mycustid',
    		'password':  'mypass',
    		'action':    'credit',
    		'transid':   '001-0000111101'
    	}

    	tclink.send(params)

    	if (result['status'] != 'accepted')
    		print 'Credit unsuccesful.'

## XI. TCS Citadel (Billing IDs)

The TCS Citadel enables you to store the billing information for your customers in the encrypted TrustCommerce database, and recall it with a single six-character alphanumeric code known as a billing ID. Besides offloading the liability of storing sensitive data such as credit card numbers from your business to TrustCommerce, it also can simplify database access on your servers.

The Citadel add two new actions, store and unstore. These allow you to create, update, and deactivate billing IDs. Once stored, the billing ID will be passed in place of the many billing information fields for preauth and sale transactions.

The store transaction looks very similar to a preauth or sale. You may pass credit card information, billing and shipping address, or even ACH information. (Please see sections X and X for a detailed description of these parameters.) It adds one additional parameter:

### Store Parameters

Parameter Name | Description
--- | ---
verify | When set to "y", a $1.00 preauth will be run on the card to ensure that it is valid.
billingid | Pass if you wish to update values of an existing billing ID.

You can update information on existing billing IDs by passing the billingid field along with the store transaction. If you wish to erase the data contained in a field, pass the exact string "null" (four characters, all lower case) as the parameter value.

The verify parameter is useful for ensuring that the card number is valid if you are not planning to bill the customer right away. It has no effect for ACH billing IDs, because there is no such thing as an ACH preauth. By default, the verification uses AVS; if you don't wish to use AVS, pass an avs of "n". Please note: normally, billing ID storage returns a status of accepted, because the card is unverified. If you use the verify parameter, however, it will return approved upon success.

The unstore action takes a single parameter:

### Unstore Parameters

Parameter Name | Description
--- | ---
billingid | The six-character alphanumeric billing ID returned by a previous store transaction.

Unstore removes the billing ID from active use, and you won't be able to run further transactions on it. For your convenience, however, it does remain visible in Vault (flagged as an inactive ID), so you can still look up old IDs if needed.

Now, the moment of truth: to run a billing ID transaction, pass the billingid parameter to a preauth or a sale in place of all of the usual billing info fields (name, cc, exp, routing, account, etc). That's all there is to it! You'll find that your sale or preauth transactions are now only a few parameters: custid, password, billingid, and amount.

### Billing ID Example

    	# First, store a new ID.
    	params = {
    		'custid':    'mycustid',
    		'password':  'mypass',
    		'action':    'store',
    		'cc':        '4111111111111111',
    		'exp':       '0404',
    		'name':      'Jennifer Smith'
    	}

    	result = tclink.send(params)

    	if (result['status'] == 'accepted'):
    		# It was succesfully stored.  Now try running a transaction on the new ID.
    		billingid = result['billingid']
    		params2 = {
    			'custid':    'mycustid',
    			'password':  'mypass',
    			'action':    'sale',
    			'billingid': billingid,
    			'amount':    '995'
    		}
    		tclink.send(params2);
    		# Unstore the ID now that we are done.
    		params3 = {
    			'custid':    'mycustid',
    			'password':  'mypass',
    			'action':    'unstore',
    			'billingid': billingid
    		}
    		tclink.send(params3)

## XII. Recurring Billing

Recurring billing (sometimes also called "subscription billing") is an extension of the billing ID system. There are four parameters that are added to a store which turn the billing ID into a recurring billing ID. They are described below.

### Recurring Parameters

Parameter Name | Required? | Description
--- | --- | ---
cycle | X | Repeat cycle in days, weeks, months, or years.
amount | X | Amount to bill in cents.
start |  | Date to start, or else offset from current date (defaults to now).
payments |  | Number of payments to make (defaults to infinite).

Cycle is in the format of a number between 1 and 99 followed by a character representing the timeframe: 'd' for days, 'w' for weeks, 'm' for months or 'y' for years. For example, a value of "3d" in this field would cause the charge to recur every three days, whereas a value of "2m" would cause it to recur every two months.

Amount is identical to the amount passed to a sale or a preauth, and indicates the amount of each charge made during the subscription.

Start is an optional field which allows the delay of the cycle's start. By default, the cycle starts the day the billing ID is stored. If it is specified in the format YYYY-MM-DD, it indicates a date when the first payment should be made. (For example, "2005-02-01" would be February 1, 2005.) If it is in the same format as the cycle (a number followed by a character), it indicates an offset from the current date. (For example, "1d" would start the billing tomorrow.)

If there is no start parameter, the first transaction is run immediately (and can cause the store action to return a "decline" or other result you would expect from a sale). Other return parameters associated with auths, such as avs code, will be returned as well.

Payments is also optional; left blank or set to zero it will continue the billing cycle until it is manually interrupted by an unstore, or by updating the billing ID with cycle set to "null". Once the final payment is made, the billing ID will be unstored.

There is only one instance in which the cycle parameter is not required, and that is a one-time future payment. By setting payments to "1" and passing a start date, the payment will be made on that date and then the billing ID unstored. The cycle parameter may be included with a one-time future payment, but it will have no effect.

### Recurring Billing Example

    	params = {
    		'custid':    'mycustid',
    		'password':  'mypass',
    		'action':    'store',
    		'cc':        '4111111111111111',
    		'exp':       '0404',
    		'name':      'Jennifer Smith',
    		'amount':    '1200'
    	}

    	mode = chooseSubscriptionMode()

    	if (mode == 1):
    		# Make a payment every day, infinitely (or until someone manually disables it)
    		params['cycle'] = '1d';
    	elif (mode == 2):
    		# Make a payment once a month for one year
    		params['cycle'] = '1m';
    		params['payments'] = '12';
    	elif (mode == 3):
    		# Make a payment every six weeks, starting one week from now
    		params['cycle'] = '62';
    		params['start'] = '1w';
    	elif (mode == 4):
    		# Make annual payments, and don't start until September 1, 2004
    		params['cycle'] = '1y';
    		params['start'] = '2004-09-01';
    	elif (mode == 5):
    		# Make a one time payment in 45 days
    		params['start'] = '45d';
    		params['payments'] = '1';

    	tclink.send(params)

## XIII. TCS Wallet

The TCS Wallet is an additional service offered by the TrustCommerce gateway that allows you to run many small micropayments which are later lumped together and submitted as a single, large payment. This can offer a substantial savings for the merchant in transaction fees, as merchant account providers tend to penalize merchants that run small payments.

The Wallet is an extension of the billing ID system. It adds three new parameters to the store action, described below.

### Wallet Parameters

Parameter Name | Description
--- | ---
wallet | "y" to enable the wallet.
walletsize | Accumulated amount, in cents, before the wallet is submitted for capture.
walletexposure | Length of time to wait before capturing the wallet.

In order to enable wallets for the billing ID that you are storing, set the "wallet" parameter to "y". The other two parameters are optional, as there are default values attached to your TC account. If you wish to change these values (which are normally $10.00 and 72 hours) please contact TrustCommerce. If you wish to change the values for an individual billing ID without changing your defaults, include these parameters.

Once the billing ID is stored, it is possible to use a new action type on the ID called walletsale. It is identical to a sale in all ways, except that it can only be used on wallet-enabled billing IDs, and it can accept amounts anywhere from $0.01 up to the size of the wallet. Walletsale will usually return "approved", but it may return "decline" if the stored credit card fails to re-authorize when the current wallet is exceeded. Except for these two modifications (the wallet parameters on the store, and changing sales to walletsales), there is no extra development to be done client-side to make wallets work. Captures happen automatically after walletexposure has expired or the walletamount has been used up; reauthorizations also happen automatically.

### Wallet Example

    	# First, store a new ID with the wallet enabled.
    	params = {
    		'custid':    'mycustid',
    		'password':  'mypass',
    		'action':    'store',
    		'cc':        '4111111111111111',
    		'exp':       '0404',
    		'name':      'Jennifer Smith',
    		'wallet':    'y'
    	}

    	result = tclink.send(params)

    	if (result['status'] == 'approved'):
    		# We have a new wallet at our disposal.  Run a micropayment on it.
    		billingid = result['billingid']
    		params2 = {
    			'custid':    'mycustid',
    			'password':  'mypass',
    			'action':    'walletsale',
    			'billingid': billingid,
    			'amount':    '995'
    		}
    		tclink.send(params)

## XIV. Purchase Level II

Purchase Level II is required by some merchant banks to achieve a qualifed discount rate. It is only used for B2B or B2G transactions. If you are selling products directly to consumers, you do not need to use PL2. Additionally, PL2 can only be used if the cardholder is using one of the three types of commercial cards: a corporate card, a business card, or a purchasing card.

PL2 has three new parmaeters:

### PL2 Input Parameters

Parameter Name | Description
--- | ---
purchaselevel | Specify as "2".
purchaseordernum | The purchasing order number from their Visa purchasing card. This is either a 16 or a 17 digit number. If they are not using a Visa purchasing card, do not pass this field.
tax | The amount of tax, in cents, charged for the order. If the order is tax exempt omit this field or set it to 0.

A successful PL2 transaction will return one extra response parameter

### PL2 Output Parameter

Parameter Name | Description
--- | ---
commercialcard | Set to "S" for if it is a purchasing card, "R" if it is corporate card, and "B" if it is a business card.

If you don't care what kind of card they used (which you probably don't), there is no reason to store or otherwise do anything with the commercialcard return value. TrustCommerce internally handles all the details for you. However, if you want this information for some reason, you can access it from the result parameters.

### Purchase Level II Example

    	params = {
    		'custid':           'mycustid',
    		'password':         'mypass',
    		'action':           'sale',
    		'cc':               '4111111111111111',
    		'exp':              '0404',
    		'amount':           '1000'
    		'name':             'Jennifer Smith',
    		'purchaselevel':    '2'
    		'purchaseordernum': '12345678901234567'
    		'tax':              '83'    # $10.00 x 8.25% sales tax = $0.83

    	}

    	result = tclink.send(params)

    	if (result['status'] == 'approved'):
    		print 'Approved'

## XV. Order Detail

TrustCommerce offers the unique feature of automated fulfillment, by which orders submitted through the TCLink API can contain parameters describing product information. This information is then passed on to your fulfillment house, which ships the products automatically. Even if you aren't using automated fulfillment, you can use the order line item specification parameters to store information in the TrustCommerce transaction database about the type of products ordered.

First, you may wish to specify the shipping address for the customer. If it is the same as the billing address, you need not duplicate it, but rather just send the shiptosame parameter set to y. The table below enumerates the shipping parameters.

### ShipTo Parameters

Parameter Name | Description
--- | ---
shiptosame | y or n (defaults to n). If "y", then no other shipto_ parameters should be passed.
shipto_name | Name of the product recipient.
shipto_address1 | First line of shipping address.
shipto_address2 | Second line (if any) of shipping address.
shipto_city | City.
shipto_state | State.
shipto_zip | Zipcode, five or nine digits (no spaces or dashes).
shipto_country | Country, leave blank for US.

Second, some additional data about the order as a whole should be passed in the form of the following parameters.

### Order Header Parameters

Parameter Name | Description
--- | ---
shippingcode | Three character code indicating shipping method to use.
shippinghandling | The total cost of shipping and handling, in cents.
numitems | Total number of distinct items (product codes) in the order.

Finally, a number of parameters which describe the details of each type of item must be passed. In the table below, the 'X' character in the parameter name should be replaced with a digit indicating which item it applies to. For example, if numitems is set to three, then you should pass three product codes, in the form of productcode1, productcode2, and productcode3.

### Order Detail Parameters

Parameter Name | Description
--- | ---
productcodeX | The alphanumeric product code defined by the fulfillment house.
quantityX | The number of items of this type to be shipped.
priceX | The price of all items of this type not including sales tax or shipping, in cents.
taxX | Total tax charged for all items of this product code.
shippinghandlingX | Total shipping and handling charged for all items of this product code.

Please note: the shippinghandling field and the shippinghandlingX fields are mutually exclusive. Use one or the other, but not both. If you're not sure which to use, please contact your fulfillment house.

### Fulfillment Example

    	params = {
    		'custid':           'mycustid',
    		'password':         'mypass',
    		'action':           'preauth',
    		'cc':               '4111111111111111',
    		'exp':              '0404',
    		'amount':           '1979',  # Total of items, tax, and shipping
    		'name':             'Jennifer Smith',
    		'address1':         '123 Test St.',
    		'city':             'Somewhere',
    		'state':            'CA',
    		'zip':              '90001',
    		'shiptosame':       'y',     # Shipping address is same as billing address

    		'numitems':         '2',     # Two total product codes will be described
    		'shippingcode':     'OVRNGT',
    		'shippinghandling': '695',

    		'productcode1':     'PCODE1',
    		'quantity1':        '3',
    		'price1':           '600',   # Item 1 costs $2.00, and there are 3 of them
    		'tax1':             '144',   # Tax of 8%

    		'productcode2':     'PCODE2',
    		'quantity2':        '1',
    		'price2':           '500',   # Item 1 costs $5.00, there's only one
    		'tax2':             '40'     # Tax of 8%
    	}

    	tclink.send(params)

## XVI. Vault Query API

The Vault website serves as a web-based interface for merchant reconciliation. On the backend, it is a complex database that tracks all transactional data for your TrustCommerce account. The information contained in the Vault can be accessed at the API level using a standard CGI query over HTTPS.

The query API returns data in CSV (comma separated value) format, which is just a flat text file with fields separated by commas, and records separated by newlines. (You can also request the data returned in an HTML table, which is useful for debugging.) The first line of the file contains the name of each field that will be returned in subsequent records.

The parameters that the query interface accepts are described in the table below.

### Required Parameters

Parameter Name | Requred? | Description
--- | --- | ---
custid | X | TrustCommerce customer ID number.
password | X | The password for your custID.
format |  | Set to "html" for human-readable HTML output, or "text" (default) for CSV text output.
querytype | X | Possible values are: chain, transaction, summary, or billingid, corresponding to the equivalent reports on the Vault website. Read the User's Guide for further description of each report type.
media |  | Set to "cc" (default) or "ach" for media type.
begindate |  | Begin date for query, format: MM-DD-YYYY HH:MM:SS
enddate |  | End date for query, format: MM-DD-YYYY HH:MM:SS
chain |  | Narrow search to a single chain of transactions.
transid |  | Narrow search to a single transaction ID.
billingid |  | Narrow search to a single billing ID.
pastdue |  | Use 'y' or 'n'. For billing ID search. Show only recurring billing IDs that have been unable to capture the requested funds.
action |  | Narrow search by action (preauth, sale, credit, etc).
status |  | Narrow search by status (approved, accepted, decline, etc).
name |  | Narrow search by cardholder name, partial or complete.
cc |  | Narrow search by credit card number.
limit |  | Do not allow size of result set to exceed this number of records.
offset |  | Report result set starting from this offset. Use this parameter in conjunction with limit in order to page through a large result set.
showcount |  | Show the number of records returned on the last line of the result set.

The sample HTML code shown below illustrates the functionality of the query API. It can be pasted into a file and loaded on your web browser in order to try out some queries before you even begin to write your code.

### Query Example HTML

    <html>
    <head> <title> TrustCommerce Query Interface </title> </head>
    <body>
    <h2> TrustCommerce Query Interface </h2>
    <form action=https://vault.trustcommerce.com/query/>
    	<table align=center border=1>
    	<tr>
    		<td> custid </td>
    		<td> <input type=text name=custid> </td>
    		<td> This is your TrustCommerce custid (required) </td>
    	</tr>
    	<tr>
    		<td> password </td>
    		<td> <input type=password name=password> </td>
    		<td> This is your TrustCommerce password (required) </td>
    	</tr>
    	<tr>
    		<td> format </td>
    		<td> <select name=format> <option value=text>text</option>
    				<option value=html>html</option></select></td>
    		<td> Human readable (html) or computer readable (text) results</td>
    	</tr>
    	<tr>
    		<td> Query type </td>
    		<td> <select name=querytype>
    		<option value=chain>chain</option>
    		<option value=transaction>transaction</option>
    		<option value=summary>summary</option>
    		<option value=billingid>billingid</option>
    		</select></td>
    		<td> Type of query </td>
    	</tr>
    	<tr>
    		<td> media </td>
    		<td> <input type=text name=media value=cc> </td>
    		<td> For now this must be cc </td>
    	</tr>
    	<tr>
    		<td> begindate MM-DD-YYYY HH:MM:SS </td>
    		<td> <input type=text name=begindate> </td>
    		<td> Query begins at this date</td>
    	</tr>
    	<tr>
    		<td> enddate MM-DD-YYYY HH:MM:SS </td>
    		<td> <input type=text name=enddate> </td>
    		<td> Query ends at this date</td>
    	</tr>
    	<tr>
    		<td> chain </td>
    		<td> <input type=text name=chain> </td>
    		<td> Narrow search to a single chain of transactions </td>
    	</tr>
    	<tr>
    		<td> transid </td>
    		<td> <input type=text name=transid> </td>
    		<td> Narrow search to a single transactions </td>
    	</tr>
    	<tr>
    		<td> billingid </td>
    		<td> <input type=text name=transid> </td>
    		<td> Narrow search to a single billingid </td>
    	</tr>
    	<tr>
    		<td> pastdue </td>
    		<td> <select name=pastdue>
    		<option value=y>y</option>
    		<option value=n>n</option>
    		</select></td>
    		<td> Use 'y' or 'n'. For billing ID search.  Show only recurring billing IDs
    		     that have been unable to capture the requested funds. </td>
    	</tr>
    	<tr>
    		<td> action </td>
    		<td> <input type=text name=action> </td>
    		<td> Narrow search by action. (example: preauth,postauth) </td>
    	</tr>
    	<tr>
    		<td> status </td>
    		<td> <input type=text name=status> </td>
    		<td> Narrow search by status. (example: approved,accepted) </td>
    	</tr>
    	<tr>
    		<td> name </td>
    		<td> <input type=text name=name> </td>
    		<td> Narrow search by name. </td>
    	</tr>
    	<tr>
    		<td> cc </td>
    		<td> <input type=text name=cc> </td>
    		<td> Narrow search by credit card field. </td>
    	</tr>
    	<tr>
    		<td> limit </td>
    		<td> <input type=text name=limit value=20> </td>
    		<td> Limit results to this number of fields (not used for summary)</td>
    	</tr>
    	<tr>
    		<td> offset </td>
    		<td> <input type=text name=offset value=0> </td>
    		<td> Report results at this offset (used with limit to page through results)</td>
    	</tr>
    	<tr>
    		<td> showcount </td>
    		<td> <select name=showcount>
    		<option value=y>yes</option>
    		<option value=n>no</option>
    		</select></td>
    		<td> Show the number of not-limited rows on the last line of the result</td>
    	</tr>
    	<tr>
    		<td colspan=3> <input type=submit> </td>
    	</tr>
    	</table>
    </form>
    </body>
    </html>

## Appendix A - Test Data

While testing, you may wish to experiment with the different responses that the gateway can generate. The following test card numbers will produce an approval, and have address data as listed, for testing AVS. If you wish to test CVV, the code listed int he right-hand column is the correct CVV code, Other valid credit cards will work, but will produce a 'U' AVS code.

Please note: these cards ONLY work on transactions flagged as demo, or while your account is in "test" mode! For a live transaction, they will all return a decline with a declinetype of carderror.

### Test Cards - Approved

Card Type | Card Number | Exp | Address | City | State | Zip | CVV
--- | --- | --- | --- | --- | --- | --- | ---
Visa | 4111111111111111 | 04/04 | 123 Test St. | Somewhere | CA | 90001 | 123
Mastercard | 5411111111111115 | 04/04 | 4000 Main St. | Anytown | AZ | 85001 | 777
American Express | 341111111111111 | 04/04 | 12 Colorado Blvd. | Elsewhere | IL | 54321 | 4000
Discover | 6011111111111117 | 04/04 | 6789 Green Ave. | Nowhere | MA | 12345 | -
Diner's Club | 36484444444446 | 04/04 | 7390 Del Mar Blvd. | Atown | NY | 01101 | -
JCB | 213122222222221 | 04/04 | 350 Madison Ave. | Springfield | OH | 400000 | -

The following card numbers will generate a decline, with the declinetype listed as follows. You may use this to test code which takes different paths dependant upon the type of decline.

### Test Cards - Declined

Card Number | Exp | DeclineType
--- | --- | ---
4012345678909 | 04/04 | decline
5555444433332226 | 04/04 | call
4444111144441111 | 04/04 | carderror

You should also test your code to make sure it properly handles all baddata and error cases as listed in section X. Simply pass bad values in order to generate these situations.

## Appendix B - Troubleshooting

Details about installing and troubleshooting TCLink specific to your development platform can be found in the documentation included with the TCLink archive.

Once you are able to connect to the TC gateway, you should be able to diagnose parameter-related issues using the status, error, declinetype, and errortype parameters returned by the gateway. There is one response which indicates a more generic error, and that's an error of cantconnect. First, check the computer's network connection; can you ping machines on the Internet, by IP or by name?

The most common network connectivity error is that your target computer may be behind a firewall. TCLink uses the HTTPS port (443/tcp) for network communications; you can check whether this port is open from the target machine by typing "telnet vault.trustcommerce.com 443" at a UNIX command prompt, or else by loading a web browser on the target machine and attempting to visit https://vault.trustcommerce.com directly. If you timeout attempting to make the connection, but your Internet connection is working otherwise, then you may be firewalled. Speak to your network administrator about allowing outbound TCP traffic on port 443.

Another common problem is the lack of domain name (DNS) resolution. In some cases this will result in an errortype dnsfailure. (Not always; the TCLink software will sometimes fall back to hardcoded IP addresses for established accounts. But this method is insecure and error-prone, and is used only as a last resort to keep a system with temporary DNS issues up and running during the outage.) The target machine must be able to resolve the trustcommerce.com domain; try typing "host trustcommerce.com" from a UNIX command prompt. If you don't get a response, or get an error, then the machine cannot resolve DNS information and TCLink will not be able to connect to the TC gateway. Speak to your sysadmin about making domain name resolution available to your target host.

## Appendix C - Connecting via HTTPS POST

This method should only be used if a TCLink client install is not an option. It does not have the failover capability (and thus the processing uptime is not guaranteed to be 100%), or some of the enhanced security features of TCLink. In addition, transactions may be slightly slower, by an extra half second or so. It does, however support all other features available through TCLink, including all parameters and transaction types.

This is the URL:

https://vault.trustcommerce.com/trans/

The transaction should be sent as a standard POST, with CGI parameters, URL encoded. The parameters are otherwise identical to those used through TCLink.

Response parameters are returned as name-value pairs separated by newlines.

## Appendix D - Currency Table

### Currency Codes

Code | Currency Type | Code | Currency Type
--- | --- | --- | ---
usd | US Dollars | jpy | Japan Yen
eur | Euro | jod | Jordan Dinar
cad | Canadian Dollars | krw | Korea (South) Won
gbp | UK Pounds | lbp | Lebanon Pounds
dem | German Deutschemarks | luf | Luxembourg Francs
frf | French Francs | myr | Malaysia Ringgit
jpy | Japanese Yen | mxp | Mexico Pesos
nlg | Dutch Guilders | nlg | Netherlands Guilders
itl | Italian Lira | nzd | New Zealand Dollars
chf | Switzerland Francs | nok | Norway Kroner
dzd | Algeria Dinars | pkr | Pakistan Rupees
arp | Argentina Pesos | xpd | Palladium Ounces
aud | Australia Dollars | php | Philippines Pesos
ats | Austria Schillings | xpt | Platinum Ounces
bsd | Bahamas Dollars | plz | Poland Zloty
bbd | Barbados Dollars | pte | Portugal Escudo
bef | Belgium Francs | rol | Romania Leu
bmd | Bermuda Dollars | rur | Russia Rubles
brr | Brazil Real | sar | Saudi Arabia Riyal
bgl | Bulgaria Lev | xag | Silver Ounces
cad | Canada Dollars | sgd | Singapore Dollars
clp | Chile Pesos | skk | Slovakia Koruna
cny | China Yuan Renmimbi | zar | South Africa Rand
cyp | Cyprus Pounds | krw | South Korea Won
csk | Czech Republic Koruna | esp | Spain Pesetas
dkk | Denmark Kroner | xdr | Special Drawing Right (IMF)
nlg | Dutch Guilders | sdd | Sudan Dinar
xcd | Eastern Caribbean Dollars | sek | Sweden Krona
egp | Egypt Pounds | chf | Switzerland Francs
eur | Euro | twd | Taiwan Dollars
fjd | Fiji Dollars | thb | Thailand Baht
fim | Finland Markka | ttd | Trinidad and Tobago Dollars
frf | France Francs | trl | Turkey Lira
dem | Germany Deutsche Marks | gbp | United Kingdom Pounds
xau | Gold Ounces | usd | United States Dollars
grd | Greece Drachmas | veb | Venezuela Bolivar
hkd | Hong Kong Dollars | zmk | Zambia Kwacha
huf | Hungary Forint | eur | Euro
isk | Iceland Krona | xcd | Eastern Caribbean Dollars
inr | India Rupees | xdr | Special Drawing Right (IMF)
idr | Indonesia Rupiah | xag | Silver Ounces
iep | Ireland Punt | xau | Gold Ounces
ils | Israel New Shekels | xpd | Palladium Ounces
itl | Italy Lira | xpt | Platinum Ounces
jmd | Jamaica Dollars |  |

## Appendix E - Input Field List

### Input Fields

Name | Type | Minimum Length | Maximum Length
--- | --- | --- | ---
custid | string | 1 | 20
password | string | 1 | 20
action | string | 1 | 10
media | string | 1 | 10
currency | string | 3 | 3
amount | number | 3 | 8
cc | number | 13 | 16
exp | number | 4 | 4
cvv | number | 3 | 4
routing | number | 9 | 9
account | number | 3 | 17
billingid | string | 6 | 6
verify | string | 1 | 1
transid | string | 14 | 14
avs | string | 1 | 10
name | string | 1 | 60
address1 | string | 1 | 80
address2 | string | 1 | 80
zip | string | 1 | 20
city | string | 1 | 40
state | string | 1 | 20
country | string | 1 | 20
phone | string | 1 | 30
email | string | 1 | 50
track1 | string | 1 | 79
track2 | string | 1 | 40
ticket | string | 1 | 30
operator | string | 1 | 20
shiptosame | string | 1 | 1
shipto_name | string | 1 | 60
shipto_address1 | string | 1 | 40
shipto_address2 | string | 1 | 20
shipto_city | string | 1 | 20
shipto_state | string | 2 | 2
shipto_zip | string | 1 | 20
shipto_country | string | 1 | 20
numitems | number | 1 | 3
price | string | 1 | 20
shippingcode | string | 1 | 20
shippinghandling | string | 1 | 20
productcode# | string | 1 | 20
quantity# | number | 1 | 3
price# | number | 1 | 6
tax# | number | 1 | 6
shippinghandling# | number | 1 | 6
wallet | string | 1 | 1
walletsize | string | 3 | 8
walletexposure | string | 1 | 3
start | string | 2 | 10
cycle | string | 2 | 4
payments | number | 1 | 4
demo | string | 1 | 1
offlineauthcode | string | 6 | 6

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