FAQs
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The can be used to create query requests, mock query responses for testing, and parse query responses along with some utilities for posting query responses.
The can be used to parse and verify query responses on EVM chains. Simply forge install wormhole-foundation/wormhole-solidity-sdk. See the repo as an example use case. The SDK also contains for mocking query requests and responses in forge tests.
The can also be used to create query requests and parse query responses.
💡 A Rust SDK for Solana is being actively investigated by the Wormhole Contributors. See the repo as a proof of concept.
There sure are!
The guardian node calculates an ECDSA signature using where the digest hash is keccak256("query_response_0000000000000000000|"+keccak256(responseBytes)). See the whitepaper for more background. This signature then has the guardian's index in the guardian set appended to the end.
The Query Proxy is currently permissioned by the Guardians. The guardian nodes are configured to only listen to a set of allow-listed proxies. However, it is possible that this restriction may be lifted in the future and/or more proxies could be added.
It is also important to note that the proxies do not impact the verifiability the request and result - i.e. their role in the process is trustless.
Wormhole Queries provides on-demand, attested, on-chain verifiable RPC results. Each guardian independently executes the specified query and returns the result and their signature - the proxy handles aggregating the results and signatures, giving you a single result (all within one REST call) with a quorum of signatures suitable for on-chain submission, parsing, and verification using one of our examples / SDKs.
💡 If you are used to ecrecover you will notice that the v byte is 0 or 1 as opposed to 27 or 28. The signaturesToEvmStruct method in the accounts for this as well as structuring the signatures into an IWormhole.SignatureStruct[].