ERC-7695 Ownership Delegation and Context for ERC-721

DraftERCcreated 2024-04-02requires ERC-165, ERC-721

Introduces contexts and ownership delegation for ERC-721 tokens, expanding dApps and financial use cases without transferring ownership

Author: Duc Tho Tran (@ducthotran2010)

ERC-165 interface ids

Computed here as the XOR of the selectors each interface defines.

IERC7695 0x486b6fba

`0xe34464d4`	`acceptOwnershipDelegation(uint256)`
`0x624fedb2`	`attachContext(bytes32,uint256,bytes)`
`0xf6c6bb92`	`createContext(address,uint64,bytes)`
`0xf2ddaf3d`	`execDetachContext(bytes32,uint256,bytes)`
`0x29b2be01`	`getContext(bytes32)`	view
`0xcb6252c6`	`getContextUser(bytes32,uint256)`	view
`0xe1458320`	`getOwnershipDelegatee(uint256)`	view
`0x10bda4ed`	`getOwnershipManager(uint256)`	view
`0xce2dc36b`	`isAttachedWithContext(bytes32,uint256)`	view
`0x4b8532b0`	`isTokenContextLocked(bytes32,uint256)`	view
`0xaaf70302`	`maxDetachingDuration()`	view
`0xcad98336`	`pendingOwnershipDelegatee(uint256)`	view
`0x99d788f0`	`requestDetachContext(bytes32,uint256,bytes)`
`0xddc89f4f`	`setContextLock(bytes32,uint256,bool)`
`0x68afc92d`	`setContextUser(bytes32,uint256,address)`
`0x50814c2d`	`startDelegateOwnership(uint256,address,uint64)`
`0x993c5874`	`stopOwnershipDelegation(uint256)`
`0xded8825d`	`updateContext(bytes32,address,uint64)`

`0x095ea7b3`	`approve(address,uint256)`	ERC-721
`0x70a08231`	`balanceOf(address)`	ERC-721
`0x081812fc`	`getApproved(uint256)`	ERC-721
`0xe985e9c5`	`isApprovedForAll(address,address)`	ERC-721
`0x6352211e`	`ownerOf(uint256)`	ERC-721
`0xb88d4fde`	`safeTransferFrom(address,address,uint256,bytes)`	ERC-721
`0x42842e0e`	`safeTransferFrom(address,address,uint256)`	ERC-721
`0xa22cb465`	`setApprovalForAll(address,bool)`	ERC-721
`0x01ffc9a7`	`supportsInterface(bytes4)`	ERC-165
`0x23b872dd`	`transferFrom(address,address,uint256)`	ERC-721

Interfaces the spec defines alongside the core one, which an implementation may or may not carry.

`0xe68defac`	`getContext(uint256)`
`0x7ddedf1d`	`getContextCount()`
`0x3d18d645`	`getAttachedContext(uint256,uint256)`
`0x68f4a243`	`getAttachedContextCount(uint256)`

Topic0 is the keccak256 hash of the signature, which is what a log filter matches on.

`0xd646610e00048edcd547e643a376e2ae2b8dcecb8c534703718c9a7e7c9bc02c`	`ContextUpdated(bytes32,address,uint64)`
`0xa6e9e35c8a5f310b19b5699a7563ef66fade71f347ebefaf96e51dea3241d96f`	`ContextAttached(bytes32,uint256)`
`0x553d41eb4b32b2becd9ce2ff4fbd83598108811d23f67d39cc7f809e1f7a5d5b`	`ContextDetachmentRequested(bytes32,uint256)`
`0x94e01d8372cb1de282815157551f36cbba527f4dbecc3cbd524d38c147feca85`	`ContextDetached(bytes32,uint256)`
`0xc6bb28e6096807c3e639ecc36a99861b1ff0bf80ed6ba4fad23333cf9e182efc`	`ContextUserAssigned(bytes32,uint256,address)`
`0xa95021cc113e3bf56d07571579887f9542166f81e995fbde08395a89726fcb29`	`ContextLockUpdated(bytes32,uint256,bool)`
`0xd53478650f5188c1beb4a4897d233f3c9c636f600630c72266bdb216474fa752`	`OwnershipDelegationStarted(uint256,address,uint64)`
`0x54b44a462e87fa8234e977fa235b3407f1434f69b1d378032ba06a103835bfd9`	`OwnershipDelegationAccepted(uint256,address,uint64)`
`0x93f65897a88aa3c0b9b5d4db049fe366ce98e99591bc37e151bbd3d6a0814b02`	`OwnershipDelegationStopped(uint256,address)`

Proposals this one names in its requires field.