Thread by @0xCrypto_doctor

**Bedrock: Next milestone of Optimism**

The slogan of bedrock upgrade for optimism is:"Bedrock is the cheapest, fastest, and most advanced rollup architecture.Ever."

How bedrock achieve to be “cheapest, fastest, and most advanced rollup".

Let’s find out 🧵

1/
Rollups is,currently,the major technology for Layer2 solution. Both @arbitrum and @optimismFND use optimistic rollups and took up over 70% of Layer2 marketshare.

More protocols choose to build on the top of Layer 2 seems Let crypto native think rollups is flawless.

3/
While, Rollups still has it own limitation.

🔴Gas fee still unfriendly if considering more users will step into crypto world in the future.

A example: During #ArbitrumOdyssey event, without Arbitrum Nitro upgrade. Gas fee is more expensive than Ethereum Mainnet.

4/
How to reduce the fee?

One choice is simply the solidity code.

5/
In bedrock architecture. @optimismFND introduces Ethereum equivalent to simplify code.

It will turn ethereum code into Rollup code.the difference between a geth client running on Ethereum and one running on Optimism will be less than 500 lines of code

6/
While another choice is:

Minimize costs and improve efficiency at Layer 2 transaction process.

7/
The fee is majority costing in data availability (DA) fee for occupy the Layer 1 block space

In currently optimism rollups architecture.Execution layer uploads relevant proofs to Layer 1 in the form of a calldata,to a certain extent,occupy the block space of ethereum mainnet.

8/
In Bedrock architecture. A high efficient compression algorithm will introduce to reduce Layer 1 security fee and reduce 20% of cost in submitting transaction data to Ethereum

9/
But how to guarantee security and decentralization?

That is another problem of rollups solution

10/
The core problem of rollup architecture is the security of chain is depend on upgrade keys. The future rollup have to set a proof mechanism without upgrade keys.

A new fault proof mechanism introduced by @optimismFND and build on the top of bedrock is CANNON

11/
Cannon is optimism’s next-gen fault proof and will become the foundation of optimism in the future.

If you want to know the detail of Cannon. highly recommand read this artcle.
medium.com/ethereum-optim…

12/
Besides security, what about decentralization?

Currently. Sequencers of most Rollup solutions are run by the project itself or a single operator, which has serious centralization problems.

13/
In bedrock, proof diversity and client diversity is key to solve centralization problem.

Bedrock will build up a multi-client ecosystem and client diversity will heavily reduce single sequencer risk and achieve the goal of decentralization.

13/
Next month, Optimism’s goerli testnet will migrate to bedrock. The final step before mainnet upgrades.

https://mobile.twitter.com/OPLabsPBC/status/1605668303057301505

14/
if you interesting in rollup after reading, this video give best explanantion.

And if you like the content, please follow RT and like. It will be big help for me

Some taggering

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