@metamask/json-rpc-engine/dist/createScaffoldMiddleware.cjs

A tool for processing JSON-RPC messages

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.createScaffoldMiddleware = void 0;
/**
 * Creates a middleware function from an object of RPC method handler functions,
 * keyed to particular method names. If a method corresponding to a key of this
 * object is requested, this middleware will pass it to the corresponding
 * handler and return the result.
 *
 * @param handlers - The RPC method handler functions.
 * @returns The scaffold middleware function.
 */
function createScaffoldMiddleware(handlers) {
    return (req, res, next, end) => {
        const handler = handlers[req.method];
        // if no handler, return
        if (handler === undefined) {
            return next();
        }
        // if handler is fn, call as middleware
        if (typeof handler === 'function') {
            return handler(req, res, next, end);
        }
        // if handler is some other value, use as result
        res.result = handler;
        return end();
    };
}
exports.createScaffoldMiddleware = createScaffoldMiddleware;
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