Items
What are Digital Items?
Digital Items are individual, ownable objects stored by the Marble contract. A Digital Item can represent anything from a trading card to a deed of ownership to an in-game spaceship.
Upon creation, every Item is given a unique contract-wide serial number used to identify it among all other Items in the contract.
Ownership of an Item can be proven by controlling the account that owns a given Item. Every Item also belongs to one and only one Group, which dictates the different kinds of behaviors the Item can perform.
Behavior Rules
Items follow the behavior rules set by their respective groups. For example, if an Item belongs to a group whose transfer behavior is set to false, then the Item is not transferrable. If the group manager were to activate transferability with the toggle() action, the Item would become transferrable. See the Behaviors section for more information on behaviors.
Table Breakdown
Table Name: items
Table Scope: self
Field Name
Field Type
Description
serial
uint64_t
Contract-wide Item serial number. (Primary Key)
group
name
Group name identifier.
owner
name
Account that owns the Item.
Additional Indices
bygroup, byowner
Mint New Item
To create a new Item, call the mintitem() action on your Marble contract.
Required Authority: group.manager
Action Parameters
Name
Type
Example
Description
to
name
testaccount1
The recipient account that will own the new Item.
group
name
group1
The group the new Item will belong to.
Examples
Transfer an Item
To transfer an Item, call the transferitem() action on your Marble contract.
All items included in the transfer must be owned by the "from" account to be a valid transfer.
Required Authority: item.owner
Notified Accounts: from, to
Action Parameters
Name
Type
Example
Description
from
name
testaccount1
Account name of sender.
to
name
testaccount2
Account name of recipient.
serials
vector<uint64_t>
[5, 6, 8, 9]
The serial numbers of the Items to transfer.
memo
string
"Thank You!"
An optional memo field.
Examples
Activate an Item
Items can be activated with the activateitem() action. Developers can interpret what activations do in reference to their own applications. Items can be activated any number of times.
Required Authority: item.owner and group.manager
Action Parameters
Name
Type
Example
Description
serial
uint64_t
5
Serial number of the Item to activate.
Examples
Consume an Item
Some Items can be consumed by the owner. Consumable Items will be destroyed after consumption. Developers determine what Item consumption translates to in their projects.
Required Authority: item.owner
Action Parameters
Name
Type
Example
Description
serial
uint64_t
5
Serial number of the Item to consume.
Examples
Destroy an Item
To destroy an Item, call the destroyitem() action on your Marble contract.
Required Authority: group.manager
Action Parameters
Name
Type
Example
Description
serial
uint64_t
5
Serial number of Item to destroy.
memo
string
"Destroying Item 5"
Optional memo
Examples
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