/*
 * Copyright 2011-2014 Con Kolivas
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the Free
 * Software Foundation; either version 3 of the License, or (at your option)
 * any later version.  See COPYING for more details.
 */

#include "config.h"

#include <string.h>

#include "ckpool.h"
#include "libckpool.h"

static const char *b58chars = "123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz";

bool validate_address(connsock_t *cs, const char *address)
{
	json_t *val, *res_val, *valid_val;
	char rpc_req[256];
	bool ret = false;
	int len, i, j;

	if (unlikely(!address)) {
		LOGWARNING("Null address passed to validate_address");
		return ret;
	}
	len = strlen(address);
	if (len < 27 || len > 34) {
		LOGWARNING("Invalid address length %d passed to validate_address", len);
		return ret;
	}
	for (i = 0; i < len; i++) {
		char c = address[i];
		bool found = false;

		for (j = 0; j < 58; j++) {
			if (c == b58chars[j]) {
				found = true;
				break;
			}
		}
		if (!found) {
			LOGWARNING("Invalid char %.1s passed to validate_address", &c);
			return ret;
		}
	}

	snprintf(rpc_req, 256, "{\"method\": \"validateaddress\", \"params\": [\"%s\"]}\n", address);
	val = json_rpc_call(cs, rpc_req);
	if (!val) {
		LOGERR("Failed to get valid json response to validate_address");
		return ret;
	}
	res_val = json_object_get(val, "result");
	if (!res_val) {
		LOGERR("Failed to get result json response to validate_address");
		goto out;
	}
	valid_val = json_object_get(res_val, "isvalid");
	if (!valid_val) {
		LOGERR("Failed to get isvalid json response to validate_address");
		goto out;
	}
	if (!json_is_true(valid_val))
		LOGWARNING("Bitcoin address %s is NOT valid", address);
	else {
		LOGDEBUG("Bitcoin address %s IS valid", address);
		ret = true;
	}
out:
	if (val)
		json_decref(val);
	return ret;
}