HackMD
Protocolberg 2023
Non-Problems
Gavin Wood
@gavofyork
https://hackmd.io/@polkadot/Protocolberg2023np
Polkadot
Substrate
Frame
👆
Frame
Account Abstraction 🤔
An "Account" generally means "Caller identifier"; confers certain privileges within some logic.
Account (Signed)
is a type of
System Origin
is a type of
Runtime Origin
is a type of
XCM Origin
Note:
In Frame, accounts are a distant second-class citizen, not in the exhaulted place within the EVM EE. This means we can play around with them a lot more or, if we want disregard them completely and use a more effective abstraction.
"Rules like the Account system"
Other Origin Examples
RootTreasuryCollectiveMembers(Amount, Count)Parachain(Index)Person(Alias)Xcm(Location)- …
Non-Problems
Transaction Batching
In Frame, just use the Utility.batch call.
Non-Problems
Account Delegation
In Frame, just use the Utility.proxy call.
Non-Problems
Multisig / Threshold sig
In Frame, just use the Utility.multisig call.
Non-Problems
Account recovery on lost Secret Key
In Frame, just use the Recovery.as_recovered call.
Non-Problems
Exotic Signatures
In Frame at the level of a chain, we just implement Verify for any crypto we wish to support.
(Currently this includes Schnorr/Ristretto 25519, Ed25519 and ECDSA/SECP256k1.)
Non-Problems
Exotic Signatures
In Frame if we want to introduce a module which allows for using arbitrary new crypto, we just use a SignedExtension or ValidateUnsigned.
(This was used to great effect for claiming DOT tokens from an ETH address.)
Non-Problems
Paying fees in a non-native token
In Frame, paying fees is not a first-class citizen; it's a SignedExtension. So paying fees in multiple tokens (either with a multiasset treasury or through an exchange) is a trival reimplementation.
Non-Problems
Paying someone else's fee
In Frame, paying someone else's fees is as trivial as the Utility.proxy call.
(The main reason this is not yet prevalent on Polkadot is the transmission of the intention, but a decentralised and secure system for this is expected soon.)
Non-Problems
Accounts always require a balance for gas fees
Frame has the ability to return Pays::No from any calls, meaning the system picks up the tab. Frame can also support not even requiring the sender account to exist prior with an appropriate SignedExtension.
"Some rules can be bent; others broken."
