diff --git a/primitives/src/lib.rs b/primitives/src/lib.rs index 9fe493c72..cd6c2a70c 100644 --- a/primitives/src/lib.rs +++ b/primitives/src/lib.rs @@ -75,3 +75,162 @@ pub type Header = generic::Header; /// Block type. pub type Block = generic::Block; + + +pub mod xcm { + use codec::{Compact, Encode}; + use sp_io::hashing::blake2_256; + use sp_std::{borrow::Borrow, marker::PhantomData, vec::Vec}; + use xcm::prelude::{ + AccountId32, AccountKey20, Here, MultiLocation, PalletInstance, Parachain, X1, + }; + use xcm_executor::traits::Convert; + + /// NOTE: Copied from + /// + /// temporary struct that mimics the behavior of the upstream type that we + /// will move to once we update this repository to Polkadot 0.9.43+. + pub struct HashedDescriptionDescribeFamilyAllTerminal(PhantomData); + impl + Clone> HashedDescriptionDescribeFamilyAllTerminal { + fn describe_location_suffix(l: &MultiLocation) -> Result, ()> { + match (l.parents, &l.interior) { + (0, Here) => Ok(Vec::new()), + (0, X1(PalletInstance(i))) => { + Ok((b"Pallet", Compact::::from(*i as u32)).encode()) + } + (0, X1(AccountId32 { id, .. })) => Ok((b"AccountId32", id).encode()), + (0, X1(AccountKey20 { key, .. })) => Ok((b"AccountKey20", key).encode()), + _ => Err(()), + } + } + } + + impl + Clone> Convert + for HashedDescriptionDescribeFamilyAllTerminal + { + fn convert_ref(location: impl Borrow) -> Result { + let l = location.borrow(); + let to_hash = match (l.parents, l.interior.first()) { + (0, Some(Parachain(index))) => { + let tail = l.interior.split_first().0; + let interior = Self::describe_location_suffix(&tail.into())?; + (b"ChildChain", Compact::::from(*index), interior).encode() + } + (1, Some(Parachain(index))) => { + let tail = l.interior.split_first().0; + let interior = Self::describe_location_suffix(&tail.into())?; + (b"SiblingChain", Compact::::from(*index), interior).encode() + } + (1, _) => { + let tail = l.interior.into(); + let interior = Self::describe_location_suffix(&tail)?; + (b"ParentChain", interior).encode() + } + _ => return Err(()), + }; + Ok(blake2_256(&to_hash).into()) + } + + fn reverse_ref(_: impl Borrow) -> Result { + Err(()) + } + } + + #[test] + fn test_hashed_family_all_terminal_converter() { + use xcm::prelude::X2; + + type Converter = HashedDescriptionDescribeFamilyAllTerminal; + + assert_eq!( + [ + 129, 211, 14, 6, 146, 54, 225, 200, 135, 103, 248, 244, 125, 112, 53, 133, 91, 42, + 215, 236, 154, 199, 191, 208, 110, 148, 223, 55, 92, 216, 250, 34 + ], + Converter::<[u8; 32]>::convert(MultiLocation { + parents: 0, + interior: X2( + Parachain(1), + AccountId32 { + network: None, + id: [0u8; 32] + } + ), + }) + .unwrap() + ); + assert_eq!( + [ + 17, 142, 105, 253, 199, 34, 43, 136, 155, 48, 12, 137, 155, 219, 155, 110, 93, 181, + 93, 252, 124, 60, 250, 195, 229, 86, 31, 220, 121, 111, 254, 252 + ], + Converter::<[u8; 32]>::convert(MultiLocation { + parents: 1, + interior: X2( + Parachain(1), + AccountId32 { + network: None, + id: [0u8; 32] + } + ), + }) + .unwrap() + ); + assert_eq!( + [ + 237, 65, 190, 49, 53, 182, 196, 183, 151, 24, 214, 23, 72, 244, 235, 87, 187, 67, + 52, 122, 195, 192, 10, 58, 253, 49, 0, 112, 175, 224, 125, 66 + ], + Converter::<[u8; 32]>::convert(MultiLocation { + parents: 0, + interior: X2( + Parachain(1), + AccountKey20 { + network: None, + key: [0u8; 20] + } + ), + }) + .unwrap() + ); + assert_eq!( + [ + 226, 225, 225, 162, 254, 156, 113, 95, 68, 155, 160, 118, 126, 18, 166, 132, 144, + 19, 8, 204, 228, 112, 164, 189, 179, 124, 249, 1, 168, 110, 151, 50 + ], + Converter::<[u8; 32]>::convert(MultiLocation { + parents: 1, + interior: X2( + Parachain(1), + AccountKey20 { + network: None, + key: [0u8; 20] + } + ), + }) + .unwrap() + ); + assert_eq!( + [ + 254, 186, 179, 229, 13, 24, 84, 36, 84, 35, 64, 95, 114, 136, 62, 69, 247, 74, 215, + 104, 121, 114, 53, 6, 124, 46, 42, 245, 121, 197, 12, 208 + ], + Converter::<[u8; 32]>::convert(MultiLocation { + parents: 1, + interior: X2(Parachain(2), PalletInstance(3)), + }) + .unwrap() + ); + assert_eq!( + [ + 217, 56, 0, 36, 228, 154, 250, 26, 200, 156, 1, 39, 254, 162, 16, 187, 107, 67, 27, + 16, 218, 254, 250, 184, 6, 27, 216, 138, 194, 93, 23, 165 + ], + Converter::<[u8; 32]>::convert(MultiLocation { + parents: 1, + interior: Here, + }) + .unwrap() + ); + } +} diff --git a/runtime/hydradx/src/xcm.rs b/runtime/hydradx/src/xcm.rs index 9fd85919b..6555b731d 100644 --- a/runtime/hydradx/src/xcm.rs +++ b/runtime/hydradx/src/xcm.rs @@ -306,6 +306,8 @@ pub type LocationToAccountId = ( SiblingParachainConvertsVia, // Straight up local `AccountId32` origins just alias directly to `AccountId`. AccountId32Aliases, + // Generate remote accounts according to polkadot standards + primitives::xcm::HashedDescriptionDescribeFamilyAllTerminal, ); parameter_types! {