@graphql-mesh/cli/esm/commands/serve/getGraphQLWSOpts.js

export function getGraphQLWSOptions(getBuiltMesh) {
    return {
        execute: (args) => args.rootValue.execute(args),
        subscribe: (args) => args.rootValue.subscribe(args),
        onSubscribe: async (ctx, msg) => {
            const { getEnveloped } = await getBuiltMesh();
            const { schema, execute, subscribe, contextFactory, parse, validate } = getEnveloped(ctx);
            const args = {
                schema,
                operationName: msg.payload.operationName,
                document: parse(msg.payload.query),
                variableValues: msg.payload.variables,
                contextValue: await contextFactory(),
                rootValue: {
                    execute,
                    subscribe,
                },
            };
            const errors = validate(args.schema, args.document);
            if (errors.length)
                return errors;
            return args;
        },
    };
}