feat(bindings): add Rust RPC client crate (bindings/rust) - #1
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Add bindings/rust as a thin async Rust client over the Soroban JSON-RPC simulateTransaction endpoint, covering the read-heavy query surface first. Implements: - has_valid_claim / has_valid_claim_from_issuer - has_any_claim / has_all_claims - get_attestation / get_attestation_status - get_subject_attestations / get_issuer_attestations - is_issuer / get_global_stats Internal modules: - src/types.rs — Attestation, AttestationStatus, GlobalStats, TrustLinkError - src/xdr.rs — SCVal encode/decode helpers (no WASM target required) - src/rpc.rs — low-level simulateTransaction JSON-RPC transport - src/client.rs — TrustLinkClient public API - tests/client_tests.rs — mockito-based offline integration tests
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Summary
Adds
bindings/rust— a native Rust async RPC client for TrustLink, distinct from the on-chain contract crate. Rust backend services, CLIs, and Rust-based indexers can now integrate with TrustLink without going through the TypeScript or Python SDKs.What was added
bindings/rust/— a new Cargo crate (trustlink-client) structured as:src/types.rsAttestation,AttestationStatus,GlobalStats,TrustLinkError,ContractErrorCodesrc/xdr.rsScValencode/decode helpers (no WASM target, no Soroban SDK runtime)src/rpc.rssimulateTransactionJSON-RPC transport viareqwestsrc/client.rsTrustLinkClient— high-level public APItests/client_tests.rsmockitoMethods implemented
has_valid_claimhas_valid_claimhas_valid_claim_from_issuerhas_valid_claim_from_issuerhas_any_claimhas_any_claimhas_all_claimshas_all_claimsget_attestationget_attestationget_attestation_statusget_attestation_statusget_subject_attestationsget_subject_attestationsget_issuer_attestationsget_issuer_attestationsis_issueris_issuerget_global_statsget_global_statsDesign decisions
simulateTransactionendpoint (read-only, no signing key or XLM required).reqwest.bindings/python.NotFound,Unauthorized) surface as typedTrustLinkError::Contract { code: ContractErrorCode }.Testing
Tests use
mockitoto stub the RPC endpoint and run fully offline:has_valid_claimreturns true / falsehas_any_claim/has_all_claimscorrect boolean logicget_attestationcorrectly maps contract error Feature: Add attestation count queries Haroldwonder/TrustLink#4 →ContractErrorCode::NotFoundget_subject_attestationstransport path verifiedTrustLinkClient::newrejects invalid contract strkeysAcceptance criteria
bindings/rustcrate existshas_valid_claim,get_attestation,get_subject_attestations(plus 7 more)