Account recovery mechanism

Public keys and their function of MYKEY account

Index(data on chain)	name	function	remark
0	admin	The highest authority, manage all keys, but no specific operation authority	created by default
1	asset	Userd to transfer assets	created by default
2	adding	Used to add other operation keys, add or delete sub-accounts without delay	created by default
3	reserved	Used by other undefined actions	created by default
4	assist	As an emergency contact, it is used to make a proposal, agree to the proposal, and confirm as an emergency contact	added when it's needed
5	modify	Used to modify the public keys of sub accounts and whitelist

Defer transaction

To change admin key, operation key, and remove backup, unfreeze etc. actions needs to send a deferred tx. First store the deferred id, expiration time, tx data, etc. into the data table, then send the deferred transaction, which will be automatically executed when it expires. If it is not executed when it expires, you can call the kickdeferred method to trigger it manually.

Multisig proposals

There are two types of multisig proposals: First, the client(account owner), with the help of a backup, wants to accelerate a certain delay operation (such as modifying the admin key / operation key, etc.), then responded by other backup, and this proposal can not be cancelled (but can be overwritten), corresponding to the following table ③-quick proposal; Second, the client requests backup to help reset the admin key in case of missing recovery code. Once a backup is initiated and then responded by other backups, this kind of proposal can be cancelled by the client's admin key (to prevent the situation of backup joint cooperation), corresponding to the following table ②-urgent proposal.

In the scenarios below, 'client' is the user, and 'backup' is one of the user's emergency contacts.

Change Admin Key	Initiated by	Signing Key	Proposal Period	Deferred TX Period
Change Admin Key	Initiated by	Signing Key	Proposal Period	Deferred TX Period
①-Normal(not proposal)	only client	client's Admin Key	N/A	21 days	cancellable	not replaceable
②-Urgent Proposal	only backup	backup's Assist Key	backup is the proposer	cancellable	replaceable	30 days	cancellable	not replaceable
③-Quick Proposal	both client and backup	client's Admin Key + backup's Assist Key	client is the proposer	not cancellable	replaceable	immediate

Change or Unfreeze Operation Keys	Initiated by	Signing Key	Proposal Period	Deferred TX Period
①-Normal(not proposal)	only client	client's Admin Key	N/A	7 days	cancellable	not replaceable
③-Quick Proposal	both client and backup	client's Admin Key + backup's Assist Key	client is the proposer	not cancellable	replaceable	immediate