make param optional

[OctoSauce]

No description provided.

[jangid]

operate.md review — alphalend-sdk-js#169

First review on this PR (no prior comments). Re-derived against HEAD 2026-08-01. MERGEABLE / BLOCKED.

The change itself is clean

pythFullnodeUrl?: string on AlphalendClientOptions, consumed as options?.pythFullnodeUrl?.trim() || (<per-network default>). The .trim() || guard means whitespace-only and empty-string overrides correctly fall through to the default rather than producing an empty URL. The doc comment on src/core/types.ts:24-28 states the one thing a caller can get wrong — that it must be JSON-RPC, not gRPC/GraphQL. No findings.

🔴 Blocker for approval: CI is red — but not because of this PR

The test job fails in __tests__/oracle-price-validation.test.ts, which this diff does not touch:

● Oracle Price Validation › Root cause analysis: Oracle price entries validation
  Method not found. JSON-RPC on public fullnodes has been deprecated.
  Please migrate to gRPC or GraphQL endpoints.
  > 44 | const dynamicFields = await suiClient.getDynamicFields({

That is a pre-existing main breakage from Sui withdrawing JSON-RPC from public fullnodes, and alphalend-sdk-js#170 already fixes it by rewriting that test onto SuiGraphQLClient. #170 is now at 2/2 and merge-ready.

Action: merge #170, then rebase this branch — CI should go green with no change here. I'm withholding approval only because red CI is a hard gate, not because of anything in the diff.

🟡 Related, worth folding in while you're here

The per-network defaults this PR falls back to are themselves affected by the same shutdown. I checked all three directly:

default	result
https://fullnode.testnet.sui.io/ (testnet)	dead — -32601 Method not found. JSON-RPC on public fullnodes has been deprecated.
https://fullnode.devnet.sui.io/ (devnet)	dead — same error
https://alphalen-suimain-ef6f.mainnet.sui.rpcpool.com/ (mainnet)	private Triton endpoint; returned 403 Access forbidden to an unauthenticated request from here, so I can't confirm either way — it is plausibly IP-allowlisted and fine in CI/prod

So on testnet and devnet, SuiPythClient cannot work at all unless the caller passes the new pythFullnodeUrl — this PR is the workaround, but the defaults it falls back to are broken for two of three networks. Worth either pointing those two at an endpoint that still serves JSON-RPC, or making the override required for non-mainnet so the failure is a clear construction-time error instead of a confusing -32601 at first use.

No approval this run — red CI. Everything above other than the CI gate is advisory.