mirror of
https://github.com/pezkuwichain/pezkuwi-subxt.git
synced 2026-06-25 18:51:09 +00:00
Clara van Staden
2ab3f03f0b
Removes the `bridges/snowbridge/parachain` directory and moves everything up to under `snowbridge` directly. We are cleaning up our local dev env after merging our crates into the polkadot-sdk. --------- Co-authored-by: claravanstaden <Cats 4 life!>
75 lines
2.0 KiB
Rust
75 lines
2.0 KiB
Rust
// SPDX-License-Identifier: Apache-2.0
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// SPDX-FileCopyrightText: 2023 Snowfork <hello@snowfork.com>
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//! Types for representing inbound messages
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use codec::{Decode, Encode};
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use frame_support::PalletError;
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use scale_info::TypeInfo;
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use sp_core::{H160, H256};
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use sp_runtime::RuntimeDebug;
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use sp_std::vec::Vec;
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/// A trait for verifying inbound messages from Ethereum.
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pub trait Verifier {
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fn verify(event: &Log, proof: &Proof) -> Result<(), VerificationError>;
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}
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#[derive(Clone, Encode, Decode, RuntimeDebug, PalletError, TypeInfo)]
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#[cfg_attr(feature = "std", derive(PartialEq))]
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pub enum VerificationError {
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/// Execution header is missing
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HeaderNotFound,
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/// Event log was not found in the verified transaction receipt
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LogNotFound,
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/// Event log has an invalid format
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InvalidLog,
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/// Unable to verify the transaction receipt with the provided proof
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InvalidProof,
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}
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pub type MessageNonce = u64;
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/// A bridge message from the Gateway contract on Ethereum
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#[derive(Clone, Encode, Decode, PartialEq, RuntimeDebug, TypeInfo)]
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pub struct Message {
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/// Event log emitted by Gateway contract
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pub event_log: Log,
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/// Inclusion proof for a transaction receipt containing the event log
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pub proof: Proof,
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}
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const MAX_TOPICS: usize = 4;
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#[derive(Clone, RuntimeDebug)]
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pub enum LogValidationError {
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TooManyTopics,
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}
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/// Event log
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#[derive(Clone, Encode, Decode, PartialEq, RuntimeDebug, TypeInfo)]
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pub struct Log {
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pub address: H160,
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pub topics: Vec<H256>,
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pub data: Vec<u8>,
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}
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impl Log {
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pub fn validate(&self) -> Result<(), LogValidationError> {
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if self.topics.len() > MAX_TOPICS {
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return Err(LogValidationError::TooManyTopics)
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}
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Ok(())
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}
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}
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/// Inclusion proof for a transaction receipt
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#[derive(Clone, Encode, Decode, PartialEq, RuntimeDebug, TypeInfo)]
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pub struct Proof {
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// The block hash of the block in which the receipt was included.
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pub block_hash: H256,
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// The index of the transaction (and receipt) within the block.
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pub tx_index: u32,
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// Proof keys and values (receipts tree)
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pub data: (Vec<Vec<u8>>, Vec<Vec<u8>>),
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}
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