Crate did_resolver_cheqd 

This crate contains a resolver for DIDs of the did:cheqd method. The implementation resolves DIDs via gRPC network requests to the configured nodes. Default nodes for cheqd’s mainnet & testnet can be used, or custom nodes can be opt-in by supplying a different gRPC URL configuration.

This crate uses gRPC types and clients generated using tonic. The generated rust code is checked-in to this repository for monitoring, see here. These generated rust files are checked-in alongside the V2 cheqd proto files & dependencies. which are sourced from cheqd’s Buf registry.

Since the generated code & proto files are not relatively large nor overwhelming in content, they are checked-in rather than pulled and/or generated at build time. The benefit is that the contents of the files can be monitored with each update, making supply-chain attacks obvious. It also reduces the build time complexity for consumers - such as reducing requirements for any 3rd party build tools to be installed (protobuf). The drawback is that it introduces some more manual maintainence. The crate exports the DIDCheqd type which implements the ssi_dids_core::DIDMethod and ssi_dids_core::resolution::DIDMethodResolver traits. This crate is uses cheqd network’s GRPC

Example

The example below is intentionally minimal and self-contained so it can be executed as a doc-test (no network calls, no async runtime). It verifies the public associated constant and basic construction of the type. This keeps cargo test --doc and tools like cargo-rdme reliable.

use did_resolver_cheqd::DIDCheqd;
use ssi_dids_core::DIDMethod;
// Confirm the API constant and that we can construct the value
assert_eq!(DIDCheqd::DID_METHOD_NAME, "cheqd");
let _ = DIDCheqd::default();
let _ = DIDCheqd::new(None);
let _ = DIDCheqd::new(Some(DidCheqdResolverConfiguration {
    networks: vec![
        NetworkConfiguration {
            grpc_url: "https://grpc.cheqd.net:443".to_string(),
            namespace: "mainnet".to_string(),
        },
    ],
}));

Library features

• Implements a DIDMethodResolver for the did:cheqd DID method.
• Exposes resolution, proto and error modules for integration.

Modules

error

proto

module structure wrapper over the generated proto types

resolution

Structs

DIDCheqd