20 lines
542 B
Rust
20 lines
542 B
Rust
// SPDX-License-Identifier: Apache-2.0
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// SPDX-FileCopyrightText: 2023 Snowfork <hello@snowfork.com>
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//! Helpers for implementing runtime api
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use crate::{Config, MessageLeaves};
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use frame_support::storage::StorageStreamIter;
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use snowbridge_merkle_tree::{merkle_proof, MerkleProof};
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pub fn prove_message<T>(leaf_index: u64) -> Option<MerkleProof>
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where
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T: Config,
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{
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if !MessageLeaves::<T>::exists() {
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return None;
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}
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let proof =
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merkle_proof::<<T as Config>::Hashing, _>(MessageLeaves::<T>::stream_iter(), leaf_index);
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Some(proof)
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}
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