Function getMethodParamsInfo

scripts/codegen/rust.ts:1706–1729

* Determine if a method has typed params. Returns `{ hasParams, typeName }`. * Handles `$ref`-based, title-bearing, and inline params uniformly: * * - Resolves `$ref` to its definition. * - For session methods, ignores `sessionId` (the namespace injects it). * - Returns `hasParams=false`

(
	method: RpcMethod,
	defCollections: DefinitionCollections,
	isSession: boolean,
)

 *     definition's `title`, then the inline params `title`.
 */
function getMethodParamsInfo(
	method: RpcMethod,
	defCollections: DefinitionCollections,
	isSession: boolean,
): { hasParams: boolean; optional: boolean; typeName: string | null } {
	if (!method.params) return { hasParams: false, optional: false, typeName: null };
	const paramsSchema = getMethodParamsObjectSchema(
		method,
		defCollections,
		isSession,
	);
	if (!paramsSchema) return { hasParams: false, optional: false, typeName: null };

	const typeName = rustParamsTypeName(method, defCollections);

	const props = Object.keys(paramsSchema.properties || {});
	if (props.length === 0) return { hasParams: false, optional: false, typeName: null };
	if (!typeName) return { hasParams: false, optional: false, typeName: null };
	const required = new Set(paramsSchema.required || []);
	const hasRequiredParams = props.some((p) => required.has(p));
	const optional = isNullableParamsSchema(method.params, defCollections) &&
		!hasRequiredParams;
	return { hasParams: true, optional, typeName };
}

function rpcMethodConstName(method: RpcMethod): string {
	return method.rpcMethod.replace(/\./g, "_").toUpperCase();