feat: start of block witnesser

api/bin/chainflip-ingress-egress-tracker/src/witnessing/state_chain.rs

@@ -370,7 +370,8 @@ where
 		Swapping(_) |
 		LiquidityProvider(_) |
 		LiquidityPools(_) |
-		SolanaElections(_) => {},
+		SolanaElections(_) |
+		BitcoinElections(_) => {},
 	};
 
 	Ok(())

state-chain/cf-integration-tests/src/mock_runtime.rs

@@ -26,8 +26,8 @@ use state_chain_runtime::{
 	opaque::SessionKeys,
 	test_runner::*,
 	AccountId, AccountRolesConfig, ArbitrumChainTrackingConfig, BitcoinChainTrackingConfig,
-	EmissionsConfig, EnvironmentConfig, EthereumChainTrackingConfig, EthereumVaultConfig,
-	EvmThresholdSignerConfig, FlipConfig, FundingConfig, GovernanceConfig,
+	BitcoinElectionsConfig, EmissionsConfig, EnvironmentConfig, EthereumChainTrackingConfig,
+	EthereumVaultConfig, EvmThresholdSignerConfig, FlipConfig, FundingConfig, GovernanceConfig,
 	PolkadotChainTrackingConfig, ReputationConfig, SessionConfig, SolanaChainTrackingConfig,
 	SolanaElectionsConfig, ValidatorConfig,
 };
@@ -340,6 +340,7 @@ impl ExtBuilder {
 					),
 				}),
 			},
+			bitcoin_elections: BitcoinElectionsConfig { option_initial_state: None },
 			ethereum_broadcaster: state_chain_runtime::EthereumBroadcasterConfig {
 				broadcast_timeout: 5 * BLOCKS_PER_MINUTE_ETHEREUM,
 			},

state-chain/chains/src/lib.rs

@@ -71,7 +71,41 @@ pub mod mocks;
 pub mod witness_period {
 	use core::ops::{Rem, Sub};
 
+	use sp_std::ops::RangeInclusive;
+
+	use codec::{Decode, Encode};
 	use frame_support::sp_runtime::traits::{One, Saturating};
+	use scale_info::TypeInfo;
+	use serde::{Deserialize, Serialize};
+
+	// So we can store a range-like object in storage, since this has encode and decode.
+	#[derive(
+		Debug, Clone, PartialEq, Eq, Encode, Decode, TypeInfo, Deserialize, Serialize, Default,
+	)]
+	pub struct BlockWitnessRange<I> {
+		start: I,
+		end: I,
+	}
+
+	impl<I: Copy> From<RangeInclusive<I>> for BlockWitnessRange<I> {
+		fn from(range: RangeInclusive<I>) -> Self {
+			Self { start: *range.start(), end: *range.end() }
+		}
+	}
+
+	impl<I> BlockWitnessRange<I> {
+		pub fn into_range_inclusive(range: BlockWitnessRange<I>) -> RangeInclusive<I> {
+			range.start..=range.end
+		}
+
+		pub fn start(&self) -> &I {
+			&self.start
+		}
+
+		pub fn end(&self) -> &I {
+			&self.end
+		}
+	}
 
 	fn block_witness_floor<
 		I: Copy + Saturating + Sub<I, Output = I> + Rem<I, Output = I> + Eq + One,

state-chain/node/src/chain_spec.rs

@@ -27,8 +27,8 @@ use state_chain_runtime::{
 		BLOCKS_PER_MINUTE_SOLANA,
 	},
 	opaque::SessionKeys,
-	AccountId, BlockNumber, FlipBalance, SetSizeParameters, Signature, SolanaElectionsConfig,
-	WASM_BINARY,
+	AccountId, BitcoinElectionsConfig, BlockNumber, FlipBalance, SetSizeParameters, Signature,
+	SolanaElectionsConfig, WASM_BINARY,
 };
 
 use cf_utilities::clean_hex_address;
@@ -849,6 +849,9 @@ fn testnet_genesis(
 			..Default::default()
 		},
 		solana_elections,
+
+		// TODO: Set correct initial state
+		bitcoin_elections: BitcoinElectionsConfig { option_initial_state: None },
 		// We can't use ..Default::default() here because chain tracking panics on default (by
 		// design). And the way ..Default::default() syntax works is that it generates the default
 		// value for the whole struct, not just the fields that are missing.

state-chain/pallets/cf-elections/src/electoral_systems.rs

@@ -1,3 +1,4 @@
+pub mod block_witnesser;
 pub mod blockchain;
 pub mod composite;
 pub mod egress_success;