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Update data-avail.md: Non-EVM DA (PoDA) #25

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Update data-avail.md: Non-EVM DA (PoDA) #25

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8 changes: 6 additions & 2 deletions src/docs/build/data-avail.md
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Expand Up @@ -40,10 +40,14 @@ An example of an EVM-Ordered Alternative DA module can be found within [this mod

### Non-EVM DA

A non-EVM DA module uses a chain not based on the EVM to manage both the ordering and storage of raw input data. Such a modification would require relatively significant modifications to the [derivation portion](https://github.com/ethereum-optimism/optimism/tree/129032f15b76b0d2a940443a39433de931a97a44/op-node/rollup/derive) of the `op-node`. No such fully-independent DA modules have been developed yet — be the first!
A non-EVM DA module uses a chain not based on the EVM to manage both the ordering and storage of raw input data. Such solutions require relatively significant modifications to the [derivation portion](https://github.com/ethereum-optimism/optimism/tree/129032f15b76b0d2a940443a39433de931a97a44/op-node/rollup/derive) of the `op-node`.

The first fully-independent DA module can be found within [the Rollux fork of the OP Stack](https://github.com/sys-labs/rollux/commit/25a4c9410ddae31ff7195f67495491f71e684e03) that uses [PoDA Protocol (Proof of Data Availability)](https://docs.rollux.com/docs/sys/PoDA/). PoDA is a layer 1 DA solution served by the Syscoin blockchain.

The Rollux implementation of PoDA also provides [a path for serving PoDA to fractal layers (L3 and beyond) through layer 2](https://github.com/sys-labs/rollux/commit/6de6849f60f20f1e0b5ca314daa543344010003e).

### Multiple DA

It is possible to use multiple Data Availability Layer modules at the same time. For instance, one could source data from two EVM-based chains simultaneously in order to form a bridge between the two chains. When using multiple Data Availability Layer modules, it is imperative to establish a global ordering between the two chains. One option for establishing this ordering is to use the timestamps of blocks from each chain.

Like a non-EVM DA module, a system with multiple Data Availability modules would need to make significant modifications to the [derivation portion](https://github.com/ethereum-optimism/optimism/tree/129032f15b76b0d2a940443a39433de931a97a44/op-node/rollup/derive) of the `op-node`. No such projects have been constructed yet.
Like a non-EVM DA module, a system with multiple Data Availability modules would need to make significant modifications to the [derivation portion](https://github.com/ethereum-optimism/optimism/tree/129032f15b76b0d2a940443a39433de931a97a44/op-node/rollup/derive) of the `op-node`. No such projects have been constructed yet.