package tezos-protocol-alpha

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package tezos-protocol-alpha
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Communication from the layer-1 (Tezos) to the layer-2 (a transaction rollup) happens thanks to messages, crafted in the layer-1 to be interpreted in the layer-2.

Messages are constructed and gathered in the layer-1, in inboxes (see Tx_rollup_repr_storage.append_message).

Smart contract on the layer-1 can deposit tickets into a transaction rollup, for the benefit of a Tx_rollup_l2_address.t. The sender is an implicit account where the deposit is returned in form of a withdrawal, should the application of the deposit fail.

type t =
  1. | Batch of string
  2. | Deposit of deposit

A message is a piece of data originated from the layer-1 to be interpreted by the layer-2.

Transaction rollups feature two kind of messages:

  • An array of bytes that supposedly contains a valid sequence of layer-2 operations; their interpretation and validation is deferred to the layer-2..
  • A deposit order for a L1 ticket.
val size : t -> int

size msg returns the number of bytes that are allocated in an inbox by msg.

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