bsc light client

[xiaoch05]

• Storage proof for precompile contract
• Optimize for storage related to epoch.
• Unit test & benchmark.

[github-actions]

Commit 23c3956

Pangolin

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Check Storage Prefix

Pallet BSC:
+ 	Item: Storage { name: "LatestBscHeader", type: Plain("BSCHeader") }​

Pangoro

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Commit 23c3956

Pangolin

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Pallet BSC:
+ 	Item: Storage { name: "LatestBscHeader", type: Plain("BSCHeader") }​

Pangoro

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Commit 46ff332

Pangolin

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Pallet BSC:
+ 	Item: Storage { name: "LatestBscHeader", type: Plain("BSCHeader") }​

Pangoro

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Commit 9b6c0cc

Pangolin

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Pallet BSC:
+ 	Item: Storage { name: "LatestBscHeader", type: Plain("BSCHeader") }​

Pangoro

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Commit 90d793f

Pangolin

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Pallet BSC:
+ 	Item: Storage { name: "LatestBscHeader", type: Plain("BSCHeader") }​

Pangoro

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Commit c27f9a1

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Commit 20bdb23

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Commit 70712d3

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Commit 965141c

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Commit 18faa7d

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[hackfisher]

Remove, cause we will not use inherent for update authority

		/// Verify unsigned relayed headers and finalize authority set
		#[pallet::weight(0)]
		pub fn verify_and_update_authority_set_unsigned(
			origin: OriginFor<T>,
			headers: Vec<BSCHeader>,
		) -> DispatchResultWithPostInfo {
			// ensure not signed
			frame_system::ensure_none(origin)?;

			Self::verify_and_update_authority_set(&headers)?;

			Ok(().into())
		}

[hackfisher]

Request to simplify the implementation because BSC's epoch length is 200 and block interval is 3 seconds, relaying epoch block is enough for message verification.

Remove

pub fn submit_header(
			origin: OriginFor<T>,
			header: BSCHeader,
		) -> DispatchResultWithPostInfo {
...

and

pub fn verify_header(header: &BSCHeader) -> DispatchResult {

[hackfisher]

LGTM, @AurevoirXavier @hujw77 Please help review

[hujw77]

LGTM

[aurexav]

Let me resolve the conflict.