Decrement Int Value
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This method will decrement the integer value in a Data Object
by a certain constant (non-negative). You can always increment it. Note,
this method does not allow integer overflows, i.e. if you decrement by a constant that would result in
an overflow, an error will be thrown. Note also that you can use the Feature lock in the
Access Token to specify the upper bound of the decrement constant. So, if you
only want to allow decrementing by 1, please set Feature lock field to
1 also. Please see Remarks for more details (including access token setup).
This method is accessed in several ways. Each way works in the same way and requires the same permission.
The only difference is the type of parameters. Both cases are listed below:
Parameters
Method 1 (general): https://api.cryptolens.io/api/data/DecrementIntValue
| Parameter |
Description |
Remarks |
| Id |
The unique object id for the data object. |
required |
| IntValue |
The constant int value that should be subtracted to the current IntValue of the data object.
For example, if this value is set to 5 and the old IntValue is 11,
then the new IntValue will be the old one minus 5, i.e. 6.
Note, if you would set this value to -5 instead, the same result would be achieved.
|
optional, 0 by default. |
| EnableBound |
If set to true, it will be possible to specify a lower bound. For example,
if you set the Bound parameter (below) to 0, you will be able to decrement the
int value until you reach zero (inclusive). Once the lower bound is reached, an error will be thrown.
|
optional, false by default. |
| Bound |
This is the lower bound that will be enforced on the decrement operation. It will only be enforced
if EnableBound is set to true. Please read the description above.
|
optional, 0 by default. |
| v |
Method version. |
optional. by default, it's 1. |
Method 2 (key specific): https://api.cryptolens.io/api/data/DecrementIntValueToKey
There are two ways to call this method:
| Parameter |
Description |
Remarks |
| ProductId |
the product id |
required |
| Key |
the serial key string |
required |
| Id |
The unique object id for the data object. |
required |
| IntValue |
The constant int value that should be subtracted to the current IntValue of the data object.
For example, if this value is set to 5 and the old IntValue is 11,
then the new IntValue will be the old one minus 5, i.e. 6.
Note, if you would set this value to -5 instead, the same result would be achieved.
|
optional, 0 by default. |
| EnableBound |
If set to true, it will be possible to specify a lower bound. For example,
if you set the Bound parameter (below) to 0, you will be able to decrement the
int value until you reach zero (inclusive). Once the lower bound is reached, an error will be thrown.
|
optional, false by default. |
| Bound |
This is the lower bound that will be enforced on the decrement operation. It will only be enforced
if EnableBound is set to true. Please read the description above.
|
optional, 0 by default. |
| v |
Method version. |
optional. by default, it's 1. |
| Parameter |
Description |
Remarks |
| ProductId |
the product id |
required |
| Key |
the serial key string |
required |
| Name |
The name of the data object. |
required |
| IntValue |
The constant int value that should be subtracted to the current IntValue of the data object.
For example, if this value is set to 5 and the old IntValue is 11,
then the new IntValue will be the old one minus 5, i.e. 6.
Note, if you would set this value to -5 instead, the same result would be achieved.
|
optional, 0 by default. |
| EnableBound |
If set to true, it will be possible to specify a lower bound. For example,
if you set the Bound parameter (below) to 0, you will be able to decrement the
int value until you reach zero (inclusive). Once the lower bound is reached, an error will be thrown.
|
optional, false by default. |
| Bound |
This is the lower bound that will be enforced on the decrement operation. It will only be enforced
if EnableBound is set to true. Please read the description above.
|
optional, 0 by default. |
| v |
Method version. |
optional. by default, it's 1. |
Method 3 (machine code specific): https://api.cryptolens.io/api/data/DecrementIntValueToMachineCode
There are two ways to call this method:
| Parameter |
Description |
Remarks |
| ProductId |
the product id |
required |
| Key |
the serial key string |
required |
| MachineCode |
the machine code |
required |
| Id |
The unique object id for the data object. |
required |
| IntValue |
The constant int value that should be subtracted to the current IntValue of the data object.
For example, if this value is set to 5 and the old IntValue is 11,
then the new IntValue will be the old one minus 5, i.e. 6.
Note, if you would set this value to -5 instead, the same result would be achieved.
|
optional, 0 by default. |
| EnableBound |
If set to true, it will be possible to specify a lower bound. For example,
if you set the Bound parameter (below) to 0, you will be able to decrement the
int value until you reach zero (inclusive). Once the lower bound is reached, an error will be thrown.
|
optional, false by default. |
| Bound |
This is the lower bound that will be enforced on the decrement operation. It will only be enforced
if EnableBound is set to true. Please read the description above.
|
optional, 0 by default. |
| v |
Method version. |
optional. by default, it's 1. |
| Parameter |
Description |
Remarks |
| ProductId |
the product id |
required |
| Key |
the serial key string |
required |
| MachineCode |
the machine code |
required |
| Name |
The name of the data object. |
required |
| IntValue |
The constant int value that should be subtracted to the current IntValue of the data object.
For example, if this value is set to 5 and the old IntValue is 11,
then the new IntValue will be the old one minus 5, i.e. 6.
Note, if you would set this value to -5 instead, the same result would be achieved.
|
optional, 0 by default. |
| EnableBound |
If set to true, it will be possible to specify a lower bound. For example,
if you set the Bound parameter (below) to 0, you will be able to decrement the
int value until you reach zero (inclusive). Once the lower bound is reached, an error will be thrown.
|
optional, false by default. |
| Bound |
This is the lower bound that will be enforced on the decrement operation. It will only be enforced
if EnableBound is set to true. Please read the description above.
|
optional, 0 by default. |
| v |
Method version. |
optional. by default, it's 1. |
Results
| Parameter |
Description |
Remarks |
| Result |
This is either 0(=success) or 1(=error). |
always returned |
| Message |
The message that provides additional information about the result.
If it's a successful result, null will be returned.
Otherwise, in case of an error, a short message will be returned describing the error.
|
always returned. |
Example results
{"result":0,"message":null}
Remarks
-
The sign of the IntValue (decrementing constant) parameter will not be taken into account,
i.e. -5 is treated as 5.
-
Integer overflows are not allowed. If you attempt to decrement by constant that would
result in an integer overflow, an error will be thrown and no changes are going to be made.
-
Feature lock in Access Token can be used as a way
to specify the upper bound for the IntValue (decrementing constant). If Feature lock
is not 0, the value of the Feature lock will function as an upper bound. So, if
you only want to allow decrementing by 1, please set Feature lock to 1
-
The EnableBound option allows you to specify a lower bound for the decrement operation. That is,
if you want to force this method to stop at zero (eg. allow only positive values), you can specify the Bound
to be 0. In this case, when the int value reaches zero, it will no longer be possible to decrement the int value. This condition
is temporal, i.e. by modifying the lower bound parameter, you can achieve a different lower bound.
-
When accessing the key specific methods (using productId and the key string),
you need to either disable key lock (set it to zero) or set it to a negative number,
in the same way you would have done if you would have used KeyLock.
We recommend to set the KeyLock to -1 when creating the access token.
Errors
| Error |
| Access denied. |
| The input parameters were incorrect. |
| Not enough permission. |
| Not enough permission and/or product not found. |
| Not enough permission and/or key not found. |
| Incorrect 'ReferencerType'. It can either be 0 (for a User), 1 (for a Product) and 2 (for a Key). |
| The increment/decrement value not allowed by security settings. |
| Cannot increment/decrement value since the limit was reached for an int32. |
| Not enough permission and/or machine code not found. |
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