package tezos-protocol-017-PtNairob

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package tezos-protocol-017-PtNairob
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empty_l2_context_hash is the context hash of the layer-2 context just after its origination.

The empty layer2 context hash is the hash of the underlying Irmin tree. One important note is: an empty tree *must* not be hashed when it's empty. See https://github.com/mirage/irmin/issues/1304.

Our solution is to write data in the tree to have a non-empty one. We write the Tx_rollup_l2_context.key.Ticket_count default value (i.e. 0) and the Tx_rollup_l2_context.key.Address_count as well in the tree. Then we hash the resulting tree to create this constant.

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