Inherits: IERC165 Minimal interface for set contracts

​
Functions

​
upgrade

Upgrade an object to a new kind or set revision 
function upgrade(uint64 id, uint32 kindRev0, uint32 setRev0) external returns (Descriptor memory od);
Parameters
NameTypeDescription
iduint64Object ID
kindRev0uint32New kind revision (0 = no change)
setRev0uint32New set revision (0 = no change)
Returns
NameTypeDescription
odDescriptorDescriptor after upgrade

​
touch

Touch an object to increment revision without content change 
function touch(uint64 id) external returns (Descriptor memory od);
Parameters
NameTypeDescription
iduint64Object ID
Returns
NameTypeDescription
odDescriptorDescriptor after touch

​
transfer

Transfer ownership of an object 
function transfer(uint64 id, address to) external;
Parameters
NameTypeDescription
iduint64Object ID
toaddressAddress of the new owner

​
uri

Get URI template for metadata Client should replace {id} and {rev} placeholders 
function uri() external view returns (string memory uri_);
Returns
NameTypeDescription
uri_stringURI template string

​
owner

Get current owner of an object 
function owner(uint64 id) external view returns (address owner_);
Parameters
NameTypeDescription
iduint64Object ID
Returns
NameTypeDescription
owner_addressCurrent owner address

​
revision

Resolve and validate a revision number 
function revision(uint64 id, uint32 rev0) external view returns (uint32 rev);
Parameters
NameTypeDescription
iduint64Object ID
rev0uint32Revision to check (0 = latest)
Returns
NameTypeDescription
revuint32Valid revision (0 if invalid)

​
descriptor

Get descriptor at a specific revision 
function descriptor(uint64 id, uint32 rev0) external view returns (Descriptor memory od);
Parameters
NameTypeDescription
iduint64Object ID
rev0uint32Revision number (0 = latest)
Returns
NameTypeDescription
odDescriptorDescriptor at that revision

​
elements

Get elements at a specific revision 
function elements(uint64 id, uint32 rev0) external view returns (bytes32[] memory elems);
Parameters
NameTypeDescription
iduint64Object ID
rev0uint32Revision number (0 = latest)
Returns
NameTypeDescription
elemsbytes32[]Elements array at that revision

​
sota

Get the latest descriptor and current owner 
function sota(uint64 id) external view returns (Descriptor memory od, address owner_);
Parameters
NameTypeDescription
iduint64Object ID
Returns
NameTypeDescription
odDescriptorDescriptor at the specified revision
owner_addressCurrent owner (not historical)

​
snapshot

Get descriptor and elements at a specific revision 
function snapshot(uint64 id, uint32 rev0) external view returns (Descriptor memory od, bytes32[] memory elems);
Parameters
NameTypeDescription
iduint64Object ID
rev0uint32Revision number to query (0 = latest)
Returns
NameTypeDescription
odDescriptorDescriptor at the specified revision
elemsbytes32[]Elements at the specified revision

​
Events

​
Created

Emitted when a new object is created 
event Created(uint64 id, Descriptor od, bytes32[] elems, address owner);
Parameters
NameTypeDescription
iduint64Object ID
odDescriptorObject descriptor
elemsbytes32[]Elements of the object
owneraddressInitial owner

​
Updated

Emitted when an object is updated 
event Updated(uint64 id, Descriptor od, bytes32[] elems);
Parameters
NameTypeDescription
iduint64Object ID
odDescriptorUpdated descriptor
elemsbytes32[]Updated elements

​
Upgraded

Emitted when an object is upgraded 
event Upgraded(uint64 id, Descriptor od);
Parameters
NameTypeDescription
iduint64Object ID
odDescriptorDescriptor after upgrade

​
Touched

Emitted when an object is touched (bumped without content change) 
event Touched(uint64 id, Descriptor od);
Parameters
NameTypeDescription
iduint64Object ID
odDescriptorLatest descriptor

​
Destroyed

Emitted when an object is destroyed 
event Destroyed(uint64 id, Descriptor od);
Parameters
NameTypeDescription
iduint64Object ID
odDescriptorDescriptor before destruction

​
Transferred

Emitted when ownership is transferred 
event Transferred(uint64 id, address from, address to);
Parameters
NameTypeDescription
iduint64Object ID
fromaddressPrevious owner
toaddressNew owner