# Search

curl -X POST "https://search.dria.co/hnsw/search" \
-H "x-api-key: <YOUR_API_KEY>" \
-H "Content-Type: application/json" \
-d '{"rerank": true, "top_n": 10, "contract_id": "pPgyeHRtD2PSGjHycCARZH1odjgYPhn4x_EvivRuo9Y", "query": "What is alexanDRIA library?"}'
        
# Query

curl -X POST "https://search.dria.co/hnsw/query" \
-H "x-api-key: <YOUR_API_KEY>" \
-H "Content-Type: application/json" \
-d '{"vector": [0.123, 0.5236], "top_n": 10, "contract_id": "pPgyeHRtD2PSGjHycCARZH1odjgYPhn4x_EvivRuo9Y", "level": 2}'
        

Bash

# Search

response = requests.post(
    "https://search.dria.co/hnsw/search",
    headers={'x-api-key': '<YOUR_API_KEY>', 'Content-Type': 'application/json'},
    json={
    "rerank": True,
    "top_n": 10,
    "contract_id": "pPgyeHRtD2PSGjHycCARZH1odjgYPhn4x_EvivRuo9Y",
    "query": "What is alexanDRIA library?"
}
)
print(response.status_code)
print(response.json())
        
# Query

response = requests.post(
    "https://search.dria.co/hnsw/query",
    headers={'x-api-key': '<YOUR_API_KEY>', 'Content-Type': 'application/json'},
    json={
    "vector": [
        0.123,
        0.5236
    ],
    "top_n": 10,
    "contract_id": "pPgyeHRtD2PSGjHycCARZH1odjgYPhn4x_EvivRuo9Y",
    "level": 2
}
)
print(response.status_code)
print(response.json())
        

Python

- L2Beat’s “Upgradeability of Ethereum L2s” Report (Jul 2023, Funded by Polygon)
- Grayscale’s “Layer 2s: Paving the Road to Scale Ethereum” Article (Sep 2023)
- AI generated comparison of Optimism, zkSync, Arbitrum, Starknet, Polygon zkEVM, and Scroll based on online sources

Ethereum Layer 2 Solutions

Upgrade process The OP Mainnet rollup can be controlled and altered in the following ways: 1. By a direct upgrade of the contracts: Such an upgrade can be executed without delay and alter all rollup mechanisms, including stealing users funds. The OptimismMultisig controls all proxy contracts. 2. By halting withdrawals: The Guardian performs this role, currently set to OptimismMultisig. 3. By deleting non-finalized output roots: The Challenger performs this role, currently set to OptimismMultisig. Upgrade history Summary: 1.

Initial deployment. 2. June 2021 introduction of AddressManager and modular OVM architecture. 3. June 2021 emergency update of OVML1CrossDomainMessenger. 4. November 2021 OVM 2.0, removal of fraud proof system. 5. June 2023 replacement of the existing architecture with Bedrock (OP Stack). The current version of Optimism (Bedrock) was deployed in June 2023 and is essentially a complete rewrite of smart contracts. The previous version (Optimism OVM 2.0) had a different upgrade architecture it used a central library of contracts, AddressManager, that stored the mapping between specific smart contracts crucial for the rollups operations (such as an

 The Address Manager itself was not upgradeable. However, changing system mappings in this contract could alter the rollups internal mechanics. The Optimism MultiSig was a privileged actor able to change contract addresses in the AddressManager. Optimism OVM 2.0 was deployed in November 2021. The most significant difference was the removal of the fraud proof system that existed in a previous version, OVM 1.0 (deployed in June 2021), as the team decided that the previous design was not robust enough and the future fraud proof system will be developed based on a new architecture (called OP Stack). 26

Regenesis The first one happened on the 11th of November, 2021, and was simply called regenesis. This upgrade significantly modified the rollups internal architecture, impacting security parameters and discontinuing transaction history. The most important functional change was to the execution engine of the rollup (Optimism Virtual Machine OVM), making it Ethereum equivalent. From the user perspective, the most visible changes were to the transaction history transactions before the update were no longer available on-chain and only available as a CSV export from Etherscan. From the security perspective, removing security controls on L1 (fraud proofs and forced execution) was the most impactful. 27 dYdX dYdX is a perpetual exchange built on StarkEx technology. It is an application-specific ZK Rollup aimedat providing a rich perpetual trading platform. Read about dYdX on L2BEAT.com