Update get_proof_for()to fetch TreeVersion by item status

[0xKitsune]

Currently when fetching an inclusion proof for a given TreeItem, the latest tree is used regardless of item status.

    pub fn get_proof_for(&self, item: &TreeItem) -> (Field, InclusionProof) {
        let (leaf, root, proof) = self.latest.get_leaf_and_proof(item.leaf_index);

        let proof = InclusionProof {
            root: Some(root),
            proof: Some(proof),
            message: None,
        };

        (leaf, proof)
    }

This PR introduces logic to serve inclusion proofs based on item status.

    pub fn get_proof_for(&self, item: &TreeItem) -> (Field, InclusionProof) {
        let (leaf, root, proof) = match item.status {
            ProcessedStatus::Processed | ProcessedStatus::Mined => {
                self.processed.get_leaf_and_proof(item.leaf_index)
            }
            ProcessedStatus::Pending => self.latest.get_leaf_and_proof(item.leaf_index),
        };

        let proof = InclusionProof {
            root: Some(root),
            proof: Some(proof),
            message: None,
        };

        (leaf, proof)
    }

[0xOsiris]

Suggested change

	error!(?e, "Failed to insert identity to contract.");
	error!(?e, "Failed to insert identity to contract.");

[piohei]

Closing as it was done in different PR. :)