@rarible/estimate-middleware/esm/utils.js

export function isSafeEventEmitterProvider(x) {
    return typeof x === "object" && x !== null && "send" in x && "sendAsync" in x;
}
export class RpcError extends Error {
    constructor(message, code) {
        super(message);
        this.code = code;
        this.name = "JsonRpcError";
    }
}
export function extractError(error) {
    if (isObject(error)) {
        if ("data" in error) {
            const { data } = error;
            if (isObject(data) && isJsonRpcError(data)) {
                return new RpcError(data.message, data.code);
            }
        }
        if (isJsonRpcError(error)) {
            return new RpcError(error.message, error.code);
        }
    }
    if (error instanceof Error) {
        return error;
    }
    return new Error("Unknown error");
}
function isJsonRpcError(x) {
    return "code" in x && "message" in x;
}
function isObject(x) {
    return typeof x === "object" && x !== null;
}