fix: Complete snowbridge pezpallet rebrand and critical bug fixes

- snowbridge-pezpallet-* → pezsnowbridge-pezpallet-* (201 refs)
- pallet/ directories → pezpallet/ (4 locations)
- Fixed pezpallet.rs self-include recursion bug
- Fixed sc-chain-spec hardcoded crate name in derive macro
- Reverted .pezpallet_by_name() to .pallet_by_name() (subxt API)
- Added BizinikiwiConfig type alias for zombienet tests
- Deleted obsolete session state files

Verified: pezsnowbridge-pezpallet-*, pezpallet-staking,
pezpallet-staking-async, pezframe-benchmarking-cli all pass cargo check

pezbridges/snowbridge/primitives/verification/src/lib.rs

@@ -0,0 +1,63 @@
+// SPDX-License-Identifier: Apache-2.0
+// SPDX-FileCopyrightText: 2023 Snowfork <hello@snowfork.com>
+//! Types for representing inbound messages
+#![cfg_attr(not(feature = "std"), no_std)]
+use codec::{Decode, DecodeWithMemTracking, Encode};
+use pezframe_support::PalletError;
+use scale_info::TypeInfo;
+use pezsnowbridge_beacon_primitives::{BeaconHeader, ExecutionProof};
+use pezsp_core::{RuntimeDebug, H160, H256};
+use pezsp_std::prelude::*;
+
+/// A trait for verifying inbound messages from Ethereum.
+pub trait Verifier {
+	fn verify(event: &Log, proof: &Proof) -> Result<(), VerificationError>;
+}
+
+#[derive(Clone, Encode, Decode, DecodeWithMemTracking, RuntimeDebug, PalletError, TypeInfo)]
+#[cfg_attr(feature = "std", derive(PartialEq))]
+pub enum VerificationError {
+	/// Execution header is missing
+	HeaderNotFound,
+	/// Event log was not found in the verified transaction receipt
+	LogNotFound,
+	/// Event log has an invalid format
+	InvalidLog,
+	/// Unable to verify the transaction receipt with the provided proof
+	InvalidProof,
+	/// Unable to verify the execution header with ancestry proof
+	InvalidExecutionProof(#[codec(skip)] &'static str),
+}
+
+/// A bridge message from the Gateway contract on Ethereum
+#[derive(Clone, Encode, Decode, DecodeWithMemTracking, PartialEq, RuntimeDebug, TypeInfo)]
+pub struct EventProof {
+	/// Event log emitted by Gateway contract
+	pub event_log: Log,
+	/// Inclusion proof for a transaction receipt containing the event log
+	pub proof: Proof,
+}
+
+/// Event log
+#[derive(Clone, Encode, Decode, DecodeWithMemTracking, PartialEq, RuntimeDebug, TypeInfo)]
+pub struct Log {
+	pub address: H160,
+	pub topics: Vec<H256>,
+	pub data: Vec<u8>,
+}
+
+/// Inclusion proof for a transaction receipt
+#[derive(Clone, Encode, Decode, DecodeWithMemTracking, PartialEq, RuntimeDebug, TypeInfo)]
+pub struct Proof {
+	// Proof keys and values (receipts tree)
+	pub receipt_proof: (Vec<Vec<u8>>, Vec<Vec<u8>>),
+	// Proof that an execution header was finalized by the beacon chain
+	pub execution_proof: ExecutionProof,
+}
+
+#[derive(Clone, RuntimeDebug)]
+pub struct EventFixture {
+	pub event: EventProof,
+	pub finalized_header: BeaconHeader,
+	pub block_roots_root: H256,
+}