IOS Wallet Offline Signature Library Development Guide

1. Introduction

When developers need to use IOS native client to generate mnemonic, mnemonic To private key, create address, registered address, transfer, deployment contract, call contract, vote, etc., WaykiChain provides IOS's offline signature library for its use.

2. Sourcecode and library

IOS native wallet offline signature library compiled based on Golang language offline signature library. source code:

https://github.com/WaykiChain/wicc-wallet-utils-go

IOS native wallet offline signature library download url:

https://github.com/WaykiChain/wicc-wallet-utils-go/releases/download/v1.1/ios-wiccwallet.framework.zip

3. Instructions

3.1. Bridge.h

//
//  Bridge.h
//  CommApp
//
//  Created by sorath on 2019/3/6.
//  Copyright © 2019 sorath. All rights reserved.
//

#import <Foundation/Foundation.h>

NS_ASSUME_NONNULL_BEGIN

@interface Bridge : NSObject
//创建钱包、助记词
+ (NSString *)createNewWalletMnemonics;

//获取钱包地址和私钥
+ (NSArray *)getAddressAndPrivateKeyWithHelpString:(NSString *)helpStr;

//获取钱包哈希
+ (NSString *)getWalletHashFrom:(NSString *)codestring;

//检验钱包地址格式
+ (BOOL)addressIsAble:(NSString *)address;

//检查助记词列表

+(BOOL) checkMnemonicCode:(NSString*)words;

//打乱助记词数组词语顺序
+ (NSArray *)getRamdomArrayWithArray:(NSArray *)array;

//获取激活hex
+ (NSString *)getActrivateHexWithHelpStr:(NSString *)helpStr Fees:(double)fees validHeight:(double)validHeight ;

//获取转账wicc hex
+ (NSString *)getTransfetWICCHexWithHelpStr:(NSString *)helpStr Fees:(double)fees validHeight:(double)validHeight srcRegId:(NSString *)srcRegId destAddr:(NSString *)destAddr transferValue:(double)value ;


// 获取锁仓的hex
+ (NSString *)getLockHexWithHelpStr:(NSString *)helpStr blockHeight:(double)validHeight regessID:(NSString *)regessID appId:(NSString *)appId transferValue:(double)value;

// 获取解仓的hex
+ (NSString *)getUnlockHexWithHelpStr:(NSString *)helpStr blockHeight:(double)validHeight regessID:(NSString *)regessID appId:(NSString *)appId destAddr:(NSString *)destAddr transferValue:(double)value;

//获取 wicc兑换wusd 的 hex(string) 和 合约命令(str)
+ (NSArray *)getExchangeHexWithHelpStr:(NSString *)helpStr blockHeight:(double)validHeight regessID:(NSString *)regessID appid:(NSString *)appid exchangeValue:(double)value fee:(double)fee rate:(double)rate exchangeToken:(double)tokenNum;

//获取合约签名
+ (NSString *)getContractHexByContractStrWithHelpStr:(NSString *)helpStr blockHeight:(double)validHeight regessID:(NSString *)regessID appid:(NSString *)appid contractStr:(NSString *)contractStr handleValue:(double)value fee:(double)fee;

///发布合约
+ (NSString *)contractPub:(NSString *)helpStr blockHeight:(double)validHeight regessId:(NSString *)regessID contractStr:(NSString *)contractStr desc:(NSString *)desc fee:(double)fee;

///投票
+ (NSString *)nodeVote:(NSString *)helpStr blockHeight:(double)validHeight regessId:(NSString *)regessID beVotePubkey:(NSArray *)beVotePubkey beVoteAmounts:(NSArray *)beVoteAmounts fee:(double)fee;


@end

NS_ASSUME_NONNULL_END
2. Bridge.m
//
//  Bridge.m
//  CommApp
//
//  Created by sorath on 2019/3/6.
//  Copyright © 2019 sorath. All rights reserved.
//

#import "Bridge.h"

#import "CommApp-Swift.h"
#import "Wiccwallet.framework/Headers/Wiccwallet.h"

@implementation Bridge
//NetType:   1测试网 2 主网
+ (long )getNetType{
    if ([OtherTools getWalletConfigure] == 1) {
        return 1;
    }
    return 2;
}


//根据助记词获取私钥和地址
+ (NSArray *)getAddressAndPrivateKeyWithHelpString:(NSString *)helpStr{
    NSString *privateKey = WiccwalletGetPrivateKeyFromMnemonic(helpStr, [self getNetType]);
    NSString *address = WiccwalletGetAddressFromMnemonic(helpStr,[self getNetType]);

    return  @[address,privateKey];
}

+ (NSString *)createNewWalletMnemonics{
    NSString *mnemonics = WiccwalletGenerateMnemonics();
    return mnemonics;
}

+ (NSArray *)getWalletHelpCodesFrom:(NSString *)codestring
{
    NSArray *arr = [codestring componentsSeparatedByString:@" "];
    NSMutableArray *arr1 = [NSMutableArray arrayWithArray:arr];
    [arr1 removeObject:@" "];
    [arr1 removeObject:@""];
    return arr1;
}

+ (NSString *)getWalletHashFrom:(NSString *)codestring
{
    NSArray * helpcodes = [self getWalletHelpCodesFrom:codestring];
    int size = (int)helpcodes.count;
    int i = 0;
    NSMutableString* strWords = [[NSMutableString alloc]init];
    for(id word in helpcodes) {
        [strWords appendString:word];
        if(i != size - 1) {
            [strWords appendString:@" "];
        }
        i++;
    }
    return  strWords.sha512String;
}

+ (NSString *)getWaletHelpStringWithCodes:(NSArray *)helpcodes{
    // 产生钱包字符串
    int size = (int)helpcodes.count;
    int i = 0;
    NSMutableString* strWords = [[NSMutableString alloc]init];
    for(id word in helpcodes) {
        [strWords appendString:word];
        if(i != size - 1) {
            [strWords appendString:@" "];
        }
        i++;
    }
    return  strWords;
}

+ (BOOL)addressIsAble:(NSString *)address{
    return YES;
}

//检验助记词
+(BOOL) checkMnemonicCode:(NSString*)words{
    BOOL isTrue = NO;
    NSString *address = WiccwalletGetAddressFromMnemonic(words, [self getNetType]);
    if (![address  isEqual: @""]){
        isTrue = YES;
    }
    return isTrue;
}

+ (NSArray *)getRamdomArrayWithArray:(NSArray *)array
{
    //随机数从这里边产生
    NSMutableArray *startArray=[NSMutableArray arrayWithArray:array];
    //随机数产生结果
    NSMutableArray *resultArray= [NSMutableArray array];
    //随机数个数
    for (int i=0; i<array.count; i++) {
        int t=arc4random()%startArray.count;
        resultArray[i]=startArray[t];
        startArray[t]=[startArray lastObject]; //为更好的乱序,故交换下位置
        [startArray removeLastObject];
    }
    return resultArray;
}


# pragma mark - 获取投注的签名



//获取激活hex
+ (NSString *)getActrivateHexWithHelpStr:(NSString *)helpStr Fees:(double)fees validHeight:(double)validHeight{
    NSString *privateKey = WiccwalletGetPrivateKeyFromMnemonic(helpStr, [self getNetType]);
    NSInteger fee = fees*100000000+(arc4random() % 100);
    WiccwalletRegisterAccountTxParam * para = [[WiccwalletRegisterAccountTxParam alloc] init];
    para.fees = fee;
    para.validHeight = validHeight;
    NSError *error = [[NSError alloc] init];
    NSString *hex =  WiccwalletSignRegisterAccountTx(privateKey,para,&error);
    return hex;
}

//获取转账wicc hex
+ (NSString *)getTransfetWICCHexWithHelpStr:(NSString *)helpStr Fees:(double)fees validHeight:(double)validHeight srcRegId:(NSString *)srcRegId destAddr:(NSString *)destAddr transferValue:(double)value {
    NSString *privateKey = WiccwalletGetPrivateKeyFromMnemonic(helpStr, [self getNetType]);
    UInt64 fee = fees*100000000+(NSInteger)(arc4random() % 100);
    UInt64 transferValue = (NSInteger)(value*100000000);
    WiccwalletCommonTxParam * para = [[WiccwalletCommonTxParam alloc] init];
    para.fees = fee;
    para.validHeight = validHeight;
    para.values = transferValue;
    para.srcRegId = srcRegId;
    para.destAddr = destAddr;
    NSError *error = [[NSError alloc] init];
    NSString *hex =  WiccwalletSignCommonTx(privateKey,para,&error);

    return hex;
}

//获取锁仓签名
+ (NSString *)getLockHexWithHelpStr:(NSString *)helpStr blockHeight:(double)validHeight regessID:(NSString *)regessID appId:(NSString *)appId transferValue:(double)value {
    NSString *privateKey = WiccwalletGetPrivateKeyFromMnemonic(helpStr, [self getNetType]);
    UInt64 fee = 0.01 * 100000000+(NSInteger)(arc4random() % 100);
    UInt64 lockValue = (NSInteger)(value*100000000);
    NSString *contractStr = [self getLockContractStrWithCount:value];
    WiccwalletCallContractTxParam* para = [[WiccwalletCallContractTxParam alloc] init];
    para.fees = fee;
    para.validHeight = validHeight;
    para.srcRegId = regessID;
    para.values = lockValue;
    para.appId = appId;
    para.contractHex = contractStr;
    NSError *error = [[NSError alloc] init];
    NSString *hex =  WiccwalletSignCallContractTx(privateKey,para,&error);
    return hex;

}

+ (NSString *)getUnlockHexWithHelpStr:(NSString *)helpStr blockHeight:(double)validHeight regessID:(NSString *)regessID appId:(NSString *)appId destAddr:(NSString *)destAddr transferValue:(double)value {
    NSString *privateKey = WiccwalletGetPrivateKeyFromMnemonic(helpStr, [self getNetType]);
    UInt64 fee = 0.01 * 100000000+(NSInteger)(arc4random() % 100);
    UInt64 unlockValue = (NSInteger)(value*100000000);
    NSString *contractStr = [self getUnlockContractStrWithCount:value];
    WiccwalletCallContractTxParam* para = [[WiccwalletCallContractTxParam alloc] init];
    para.fees = fee;
    para.validHeight = validHeight;
    para.srcRegId = regessID;
    para.values = unlockValue;
    para.appId = appId;
    para.contractHex = contractStr;
    NSError *error = [[NSError alloc] init];
    NSString *hex =  WiccwalletSignCallContractTx(privateKey,para,&error);
    return hex;
}



//wicc兑换wusd
+ (NSArray *)getExchangeHexWithHelpStr:(NSString *)helpStr blockHeight:(double)validHeight regessID:(NSString *)regessID appid:(NSString *)appid exchangeValue:(double)value fee:(double)fee rate:(double)rate exchangeToken:(double)tokenNum{
    NSString *privateKey = WiccwalletGetPrivateKeyFromMnemonic(helpStr, [self getNetType]);
    UInt64 exFee = fee    * 100000000 + (NSInteger)(arc4random() % 100);
    UInt64 exchangeValue = (NSInteger)(value*100000000);
    NSString *contractStr = [self getExchangeStrWithEXRate:rate andTokenNum:tokenNum];
    WiccwalletCallContractTxParam* para = [[WiccwalletCallContractTxParam alloc] init];
    para.fees = exFee;
    para.validHeight = validHeight;
    para.srcRegId = regessID;
    para.values = exchangeValue;
    para.appId = appid;
    para.contractHex = contractStr;
    NSError *error = [[NSError alloc] init];
    NSString *hex =  WiccwalletSignCallContractTx(privateKey,para,&error);

    return @[hex,contractStr];

}

//获取合约签名
+ (NSString *)getContractHexByContractStrWithHelpStr:(NSString *)helpStr blockHeight:(double)validHeight regessID:(NSString *)regessID appid:(NSString *)appid contractStr:(NSString *)contractStr handleValue:(double)value fee:(double)fee{
    NSString *privateKey = WiccwalletGetPrivateKeyFromMnemonic(helpStr, [self getNetType]);
    UInt64 exFee = fee    * 100000000 + (NSInteger)(arc4random() % 100);
    UInt64 exchangeValue = (NSInteger)(value*100000000);
    WiccwalletCallContractTxParam* para = [[WiccwalletCallContractTxParam alloc] init];
    para.fees = exFee;
    para.validHeight = validHeight;
    para.srcRegId = regessID;
    para.values = exchangeValue;
    para.appId = appid;
    para.contractHex = contractStr;
    NSError *error = [[NSError alloc] init];
    NSString *hex =  WiccwalletSignCallContractTx(privateKey,para,&error);
    NSDictionary * errorMSg = error.userInfo;
    NSString *msg = errorMSg[@"NSLocalizedDescription"];
    if (msg){
        return [NSString stringWithFormat:@"error-%@",msg];
    }
    return hex;
}

//发布合约
+ (NSString *)contractPub:(NSString *)helpStr blockHeight:(double)validHeight regessId:(NSString *)regessID contractStr:(NSString *)contractStr desc:(NSString *)desc fee:(double)fee{

    NSString *privateKey = WiccwalletGetPrivateKeyFromMnemonic(helpStr, [self getNetType]);
    UInt64 exFee = fee    * 100000000 + (NSInteger)(arc4random() % 100);
    WiccwalletRegisterContractTxParam* para = [[WiccwalletRegisterContractTxParam alloc] init];
    para.fees = exFee;
    para.validHeight = validHeight;
    para.srcRegId = regessID;
    NSData * data = [contractStr dataUsingEncoding:NSUTF8StringEncoding];

    para.script = data;
    para.description = desc;
    NSError *error = [[NSError alloc] init];
    NSString *hex =  WiccwalletSignRegisterContractTx(privateKey,para,&error);
    NSDictionary * errorMSg = error.userInfo;
    NSString *msg = errorMSg[@"NSLocalizedDescription"];
    if (msg){
        return [NSString stringWithFormat:@"error-%@",msg];
    }
    return hex;
}


//节点投票
+ (NSString *)nodeVote:(NSString *)helpStr blockHeight:(double)validHeight regessId:(NSString *)regessID beVotePubkey:(NSArray *)beVotePubkey beVoteAmounts:(NSArray *)beVoteAmounts fee:(double)fee{

    NSString *privateKey = WiccwalletGetPrivateKeyFromMnemonic(helpStr,[self getNetType]);
    UInt64 exFee = fee * 100000000 + (NSInteger)(arc4random() % 100);
    WiccwalletDelegateTxParam * para = [[WiccwalletDelegateTxParam alloc] init];
    para.validHeight = validHeight;
    para.srcRegId = regessID;
    para.fees = exFee;

    WiccwalletOperVoteFunds * voteFounds = [[WiccwalletOperVoteFunds alloc] init];
    for(int i = 0 ; i < beVotePubkey.count ; i++){
        WiccwalletOperVoteFund * found = [[WiccwalletOperVoteFund alloc] init];
        UInt64 amount = [beVoteAmounts[i] doubleValue];
        found.pubKey = [self convertHexStrToData:beVotePubkey[i]];
        found.voteValue = amount;
        [voteFounds add:found];

    }
    para.votes = voteFounds;
    NSError *error = [[NSError alloc] init];
    NSString *hex =  WiccwalletSignDelegateTx(privateKey, para , &error);
    NSDictionary * errorMSg = error.userInfo;
    NSString *msg = errorMSg[@"NSLocalizedDescription"];
    if (msg){
        return [NSString stringWithFormat:@"error-%@",msg];
    }
    return hex;
}




+ (NSString *)getLockContractStrWithCount:(double)value
{
    NSString * header = @"f202";
    NSString * hexs = [self int64ToHex:(NSInteger)(value*100000000)];
    NSString * countreverse = [self hexToReverseHex:hexs];
    NSString * hexReveseS = [self resultHexString:countreverse];
    NSString * all = [NSString stringWithFormat:@"%@%@",header,hexReveseS];

    return all;
}

+ (NSString *)getUnlockContractStrWithCount:(double)value{
    NSString * header = @"f203";
    //    NSString * hexs = [self int64ToHex:UInt64(value*100000000)];
    //    NSString * countreverse = [self hexToReverseHex:hexs];
    NSString * hexReveseS = @"";// [self resultHexString:countreverse];
    NSString * all = [NSString stringWithFormat:@"%@%@",header,hexReveseS];
    return all;
}


+(NSString *)getExchangeStrWithEXRate:(double)rate andTokenNum:(double)tokenNum{
    //魔法数 + 方法名 + 预留参数
    NSString * header = @"f0040000";
    //汇率,先*10000,再转化为16进制,再网络序
    NSString * hex1 = [self int64ToHex:(NSInteger)(rate*10000)];
    NSString * countreverse1 = [self hexToReverseHex:hex1];
    NSString * hexReveseS1 = [self resultHexString:countreverse1];

    //兑换的token数量,先*100000000,再转化为16进制,再网络序
    NSString * hex2 = [self int64ToHex:(NSInteger)(tokenNum*100000000)];
    NSString * countreverse2 = [self hexToReverseHex:hex2];
    NSString * hexReveseS2 = [self resultHexString:countreverse2];

    NSString * all = [NSString stringWithFormat:@"%@%@%@",header,hexReveseS1,hexReveseS2];
    return all;
}

//兑换组装合约参数
+ (NSMutableData *)getExchangeDataWithEXRate:(double)rate andTokenNum:(double)tokenNum{
    NSString *all = [self getExchangeStrWithEXRate:rate andTokenNum:tokenNum];
    return [NSMutableData dataWithData:[self convertHexStrToData:all]];
}

+ (NSString *)int64ToHex:(int64_t)tmpid
{
    NSString *nLetterValue;
    NSString *str =@"";
    int64_t ttmpig;
    for (int i = 0; i<19; i++) {
        ttmpig=tmpid%16;
        tmpid=tmpid/16;
        switch (ttmpig) {
            case 10:
                nLetterValue =@"a";break;
            case 11:
                nLetterValue =@"b";break;
            case 12:
                nLetterValue =@"c";break;
            case 13:
                nLetterValue =@"d";break;
            case 14:
                nLetterValue =@"e";break;
            case 15:
                nLetterValue =@"f";break;
            default:
                nLetterValue = [NSString stringWithFormat:@"%lld",ttmpig];
        }
        str = [nLetterValue stringByAppendingString:str];
        if (tmpid == 0) {
            break;
        }
    }
    return str;
}

+ (NSString *)resultHexString:(NSString *)str{
    NSString * result = [NSString new];
    if (str.length == 0){
        result = [NSString stringWithFormat:@"%@%@",str,@"0000000000000000"];
    }else if (str.length == 1){
        result = [NSString stringWithFormat:@"%@%@",str,@"000000000000000"];
    }else if (str.length == 2){
        result = [NSString stringWithFormat:@"%@%@",str,@"00000000000000"];
    }else if (str.length == 3){
        result = [NSString stringWithFormat:@"%@%@",str,@"0000000000000"];
    }else if (str.length == 4){
        result = [NSString stringWithFormat:@"%@%@",str,@"000000000000"];
    }else if (str.length == 5){
        result = [NSString stringWithFormat:@"%@%@",str,@"00000000000"];
    }else if (str.length == 6){
        result = [NSString stringWithFormat:@"%@%@",str,@"0000000000"];
    }else if (str.length == 7){
        result = [NSString stringWithFormat:@"%@%@",str,@"000000000"];
    }else if (str.length == 8){
        result = [NSString stringWithFormat:@"%@%@",str,@"00000000"];
    }else if (str.length == 9){
        result = [NSString stringWithFormat:@"%@%@",str,@"0000000"];
    }else if (str.length == 10){
        result = [NSString stringWithFormat:@"%@%@",str,@"000000"];
    }else if (str.length == 11){
        result = [NSString stringWithFormat:@"%@%@",str,@"00000"];
    }else if (str.length == 12){
        result = [NSString stringWithFormat:@"%@%@",str,@"0000"];
    }else if (str.length == 13){
        result = [NSString stringWithFormat:@"%@%@",str,@"000"];
    }else if (str.length == 14){
        result = [NSString stringWithFormat:@"%@%@",str,@"00"];
    }else if (str.length == 15){
        result = [NSString stringWithFormat:@"%@%@",str,@"0"];
    }else if (str.length == 16){
        return str;
    }
    return result;
}


+(NSString *)resultHexString:(NSString*)str maxLen:(int)maxLen{
    NSString *result = @"";

    return result;
}
//
//+(NSString *)addZero:(NSString *)str withLength:(int)length{
//    NSString *string = nil;
//    if (str.length==length) {
//        return str;
//    }
//
//    if (str.length<length) {
//        NSUInteger inter = length-str.length;
//        for (int i=0;i< inter; i++) {
//            string = [NSString stringWithFormat:@"0%@",str];
//            str = string;
//        }
//    }
//    return string;
//}

// 16进制字符串 -> 逆序16进制字符串
+ (NSString *)hexToReverseHex:(NSString *)hex{
    NSString * transferhex;
    if (hex.length % 2 == 1){
        transferhex = [NSString stringWithFormat:@"%@%@",@"0",hex];
    }else{
        transferhex = hex;
    }
    NSMutableArray * array = [NSMutableArray new];
    for(NSUInteger i=0;i<transferhex.length/2;i+=1){
        NSRange range = NSMakeRange(i*2, 2);
        NSString *sub = [transferhex substringWithRange:range];
        [array addObject:sub];
    }

    NSArray *nuarray = [[array reverseObjectEnumerator]allObjects];

    //    NSLog(@"%@",nuarray);

    NSMutableString * numbers = [[NSMutableString alloc]init];
    for(int i = 0;i<nuarray.count;i++){
        [numbers appendString:nuarray[i]];
    }
    return numbers;
}



// 16进制字符串 -> 2进制数据
+ (NSData *)convertHexStrToData:(NSString *)str {
    if (!str || [str length] == 0) {
        return nil;
    }

    NSMutableData *hexData = [[NSMutableData alloc] initWithCapacity:8];
    NSRange range;
    if ([str length] % 2 == 0) {
        range = NSMakeRange(0, 2);
    } else {
        range = NSMakeRange(0, 1);
    }
    for (NSInteger i = range.location; i < [str length]; i += 2) {
        unsigned int anInt;
        NSString *hexCharStr = [str substringWithRange:range];
        NSScanner *scanner = [[NSScanner alloc] initWithString:hexCharStr];

        [scanner scanHexInt:&anInt];
        NSData *entity = [[NSData alloc] initWithBytes:&anInt length:1];
        [hexData appendData:entity];

        range.location += range.length;
        range.length = 2;
    }
    return hexData;
}

@end

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