src/komodo_bitcoind.h

   1 /******************************************************************************
   2  * Copyright © 2014-2016 The SuperNET Developers.                             *
   3  *                                                                            *
   4  * See the AUTHORS, DEVELOPER-AGREEMENT and LICENSE files at                  *
   5  * the top-level directory of this distribution for the individual copyright  *
   6  * holder information and the developer policies on copyright and licensing.  *
   7  *                                                                            *
   8  * Unless otherwise agreed in a custom licensing agreement, no part of the    *
   9  * SuperNET software, including this file may be copied, modified, propagated *
  10  * or distributed except according to the terms contained in the LICENSE file *
  11  *                                                                            *
  12  * Removal or modification of this copyright notice is prohibited.            *
  13  *                                                                            *
  14  ******************************************************************************/
  15
  16 // komodo functions that interact with bitcoind C++
  17
  18 #ifdef _WIN32
  19 #include <curl.h>
  20 #include <easy.h>
  21 #else
  22 #include <curl/curl.h>
  23 #include <curl/easy.h>
  24 #endif
  25
  26 #define issue_curl(cmdstr) bitcoind_RPC(0,(char *)"curl",(char *)"http://127.0.0.1:7776",0,0,(char *)(cmdstr))
  27
  28 struct MemoryStruct { char *memory; size_t size; };
  29 struct return_string { char *ptr; size_t len; };
  30
  31 // return data from the server
  32 #define CURL_GLOBAL_ALL (CURL_GLOBAL_SSL|CURL_GLOBAL_WIN32)
  33 #define CURL_GLOBAL_SSL (1<<0)
  34 #define CURL_GLOBAL_WIN32 (1<<1)
  35
  36
  37 /************************************************************************
  38  *
  39  * Initialize the string handler so that it is thread safe
  40  *
  41  ************************************************************************/
  42
  43 void init_string(struct return_string *s)
  44 {
  45     s->len = 0;
  46     s->ptr = (char *)calloc(1,s->len+1);
  47     if ( s->ptr == NULL )
  48     {
  49         fprintf(stderr,"init_string malloc() failed\n");
  50         exit(-1);
  51     }
  52     s->ptr[0] = '\0';
  53 }
  54
  55 /************************************************************************
  56  *
  57  * Use the "writer" to accumulate text until done
  58  *
  59  ************************************************************************/
  60
  61 size_t accumulatebytes(void *ptr,size_t size,size_t nmemb,struct return_string *s)
  62 {
  63     size_t new_len = s->len + size*nmemb;
  64     s->ptr = (char *)realloc(s->ptr,new_len+1);
  65     if ( s->ptr == NULL )
  66     {
  67         fprintf(stderr, "accumulate realloc() failed\n");
  68         exit(-1);
  69     }
  70     memcpy(s->ptr+s->len,ptr,size*nmemb);
  71     s->ptr[new_len] = '\0';
  72     s->len = new_len;
  73     return(size * nmemb);
  74 }
  75
  76 /************************************************************************
  77  *
  78  * return the current system time in milliseconds
  79  *
  80  ************************************************************************/
  81
  82 #define EXTRACT_BITCOIND_RESULT  // if defined, ensures error is null and returns the "result" field
  83 #ifdef EXTRACT_BITCOIND_RESULT
  84
  85 /************************************************************************
  86  *
  87  * perform post processing of the results
  88  *
  89  ************************************************************************/
  90
  91 char *post_process_bitcoind_RPC(char *debugstr,char *command,char *rpcstr,char *params)
  92 {
  93     long i,j,len; char *retstr = 0; cJSON *json,*result,*error;
  94     //printf("<<<<<<<<<<< bitcoind_RPC: %s post_process_bitcoind_RPC.%s.[%s]\n",debugstr,command,rpcstr);
  95     if ( command == 0 || rpcstr == 0 || rpcstr[0] == 0 )
  96     {
  97         if ( strcmp(command,"signrawtransaction") != 0 )
  98             printf("<<<<<<<<<<< bitcoind_RPC: %s post_process_bitcoind_RPC.%s.[%s]\n",debugstr,command,rpcstr);
  99         return(rpcstr);
 100     }
 101     json = cJSON_Parse(rpcstr);
 102     if ( json == 0 )
 103     {
 104         printf("<<<<<<<<<<< bitcoind_RPC: %s post_process_bitcoind_RPC.%s can't parse.(%s) params.(%s)\n",debugstr,command,rpcstr,params);
 105         free(rpcstr);
 106         return(0);
 107     }
 108     result = cJSON_GetObjectItem(json,"result");
 109     error = cJSON_GetObjectItem(json,"error");
 110     if ( error != 0 && result != 0 )
 111     {
 112         if ( (error->type&0xff) == cJSON_NULL && (result->type&0xff) != cJSON_NULL )
 113         {
 114             retstr = cJSON_Print(result);
 115             len = strlen(retstr);
 116             if ( retstr[0] == '"' && retstr[len-1] == '"' )
 117             {
 118                 for (i=1,j=0; i<len-1; i++,j++)
 119                     retstr[j] = retstr[i];
 120                 retstr[j] = 0;
 121             }
 122         }
 123         else if ( (error->type&0xff) != cJSON_NULL || (result->type&0xff) != cJSON_NULL )
 124         {
 125             if ( strcmp(command,"signrawtransaction") != 0 )
 126                 printf("<<<<<<<<<<< bitcoind_RPC: %s post_process_bitcoind_RPC (%s) error.%s\n",debugstr,command,rpcstr);
 127         }
 128         free(rpcstr);
 129     } else retstr = rpcstr;
 130     free_json(json);
 131     //fprintf(stderr,"<<<<<<<<<<< bitcoind_RPC: postprocess returns.(%s)\n",retstr);
 132     return(retstr);
 133 }
 134 #endif
 135
 136 /************************************************************************
 137  *
 138  * perform the query
 139  *
 140  ************************************************************************/
 141
 142 char *bitcoind_RPC(char **retstrp,char *debugstr,char *url,char *userpass,char *command,char *params)
 143 {
 144     static int didinit,count,count2; static double elapsedsum,elapsedsum2;
 145     struct curl_slist *headers = NULL; struct return_string s; CURLcode res; CURL *curl_handle;
 146     char *bracket0,*bracket1,*databuf = 0; long len; int32_t specialcase,numretries; double starttime;
 147     if ( didinit == 0 )
 148     {
 149         didinit = 1;
 150         curl_global_init(CURL_GLOBAL_ALL); //init the curl session
 151     }
 152     numretries = 0;
 153     if ( debugstr != 0 && strcmp(debugstr,"BTCD") == 0 && command != 0 && strcmp(command,"SuperNET") ==  0 )
 154         specialcase = 1;
 155     else specialcase = 0;
 156     if ( url[0] == 0 )
 157         strcpy(url,"http://127.0.0.1:7876/nxt");
 158     if ( specialcase != 0 && 0 )
 159         printf("<<<<<<<<<<< bitcoind_RPC: debug.(%s) url.(%s) command.(%s) params.(%s)\n",debugstr,url,command,params);
 160 try_again:
 161     if ( retstrp != 0 )
 162         *retstrp = 0;
 163     starttime = OS_milliseconds();
 164     curl_handle = curl_easy_init();
 165     init_string(&s);
 166     headers = curl_slist_append(0,"Expect:");
 167
 168         curl_easy_setopt(curl_handle,CURLOPT_USERAGENT,"mozilla/4.0");//"Mozilla/4.0 (compatible; )");
 169     curl_easy_setopt(curl_handle,CURLOPT_HTTPHEADER,    headers);
 170     curl_easy_setopt(curl_handle,CURLOPT_URL,           url);
 171     curl_easy_setopt(curl_handle,CURLOPT_WRITEFUNCTION, (void *)accumulatebytes);               // send all data to this function
 172     curl_easy_setopt(curl_handle,CURLOPT_WRITEDATA,             &s);                    // we pass our 's' struct to the callback
 173     curl_easy_setopt(curl_handle,CURLOPT_NOSIGNAL,              1L);                    // supposed to fix "Alarm clock" and long jump crash
 174         curl_easy_setopt(curl_handle,CURLOPT_NOPROGRESS,        1L);                    // no progress callback
 175     if ( strncmp(url,"https",5) == 0 )
 176     {
 177         curl_easy_setopt(curl_handle,CURLOPT_SSL_VERIFYPEER,0);
 178         curl_easy_setopt(curl_handle,CURLOPT_SSL_VERIFYHOST,0);
 179     }
 180     if ( userpass != 0 )
 181         curl_easy_setopt(curl_handle,CURLOPT_USERPWD,   userpass);
 182     databuf = 0;
 183     if ( params != 0 )
 184     {
 185         if ( command != 0 && specialcase == 0 )
 186         {
 187             len = strlen(params);
 188             if ( len > 0 && params[0] == '[' && params[len-1] == ']' ) {
 189                 bracket0 = bracket1 = (char *)"";
 190             }
 191             else
 192             {
 193                 bracket0 = (char *)"[";
 194                 bracket1 = (char *)"]";
 195             }
 196
 197             databuf = (char *)malloc(256 + strlen(command) + strlen(params));
 198             sprintf(databuf,"{\"id\":\"jl777\",\"method\":\"%s\",\"params\":%s%s%s}",command,bracket0,params,bracket1);
 199             //printf("url.(%s) userpass.(%s) databuf.(%s)\n",url,userpass,databuf);
 200             //
 201         } //else if ( specialcase != 0 ) fprintf(stderr,"databuf.(%s)\n",params);
 202         curl_easy_setopt(curl_handle,CURLOPT_POST,1L);
 203         if ( databuf != 0 )
 204             curl_easy_setopt(curl_handle,CURLOPT_POSTFIELDS,databuf);
 205         else curl_easy_setopt(curl_handle,CURLOPT_POSTFIELDS,params);
 206     }
 207     //laststart = milliseconds();
 208     res = curl_easy_perform(curl_handle);
 209     curl_slist_free_all(headers);
 210     curl_easy_cleanup(curl_handle);
 211     if ( databuf != 0 ) // clean up temporary buffer
 212     {
 213         free(databuf);
 214         databuf = 0;
 215     }
 216     if ( res != CURLE_OK )
 217     {
 218         numretries++;
 219         if ( specialcase != 0 )
 220         {
 221             printf("<<<<<<<<<<< bitcoind_RPC.(%s): BTCD.%s timeout params.(%s) s.ptr.(%s) err.%d\n",url,command,params,s.ptr,res);
 222             free(s.ptr);
 223             return(0);
 224         }
 225         else if ( numretries >= 1 )
 226         {
 227             //printf("Maximum number of retries exceeded!\n");
 228             free(s.ptr);
 229             return(0);
 230         }
 231         if ( (rand() % 1000) == 0 )
 232             printf( "curl_easy_perform() failed: %s %s.(%s %s), retries: %d\n",curl_easy_strerror(res),debugstr,url,command,numretries);
 233         free(s.ptr);
 234         sleep((1<<numretries));
 235         goto try_again;
 236
 237     }
 238     else
 239     {
 240         if ( command != 0 && specialcase == 0 )
 241         {
 242             count++;
 243             elapsedsum += (OS_milliseconds() - starttime);
 244             if ( (count % 1000000) == 0)
 245                 printf("%d: ave %9.6f | elapsed %.3f millis | bitcoind_RPC.(%s) url.(%s)\n",count,elapsedsum/count,(OS_milliseconds() - starttime),command,url);
 246             if ( retstrp != 0 )
 247             {
 248                 *retstrp = s.ptr;
 249                 return(s.ptr);
 250             }
 251             return(post_process_bitcoind_RPC(debugstr,command,s.ptr,params));
 252         }
 253         else
 254         {
 255             if ( 0 && specialcase != 0 )
 256                 fprintf(stderr,"<<<<<<<<<<< bitcoind_RPC: BTCD.(%s) -> (%s)\n",params,s.ptr);
 257             count2++;
 258             elapsedsum2 += (OS_milliseconds() - starttime);
 259             if ( (count2 % 10000) == 0)
 260                 printf("%d: ave %9.6f | elapsed %.3f millis | NXT calls.(%s) cmd.(%s)\n",count2,elapsedsum2/count2,(double)(OS_milliseconds() - starttime),url,command);
 261             return(s.ptr);
 262         }
 263     }
 264     printf("bitcoind_RPC: impossible case\n");
 265     free(s.ptr);
 266     return(0);
 267 }
 268
 269 static size_t WriteMemoryCallback(void *ptr,size_t size,size_t nmemb,void *data)
 270 {
 271     size_t realsize = (size * nmemb);
 272     struct MemoryStruct *mem = (struct MemoryStruct *)data;
 273     mem->memory = (char *)((ptr != 0) ? realloc(mem->memory,mem->size + realsize + 1) : malloc(mem->size + realsize + 1));
 274     if ( mem->memory != 0 )
 275     {
 276         if ( ptr != 0 )
 277             memcpy(&(mem->memory[mem->size]),ptr,realsize);
 278         mem->size += realsize;
 279         mem->memory[mem->size] = 0;
 280     }
 281     //printf("got %d bytes\n",(int32_t)(size*nmemb));
 282     return(realsize);
 283 }
 284
 285 char *curl_post(CURL **cHandlep,char *url,char *userpass,char *postfields,char *hdr0,char *hdr1,char *hdr2,char *hdr3)
 286 {
 287     struct MemoryStruct chunk; CURL *cHandle; long code; struct curl_slist *headers = 0;
 288     if ( (cHandle= *cHandlep) == NULL )
 289                 *cHandlep = cHandle = curl_easy_init();
 290     else curl_easy_reset(cHandle);
 291     //#ifdef DEBUG
 292         //curl_easy_setopt(cHandle,CURLOPT_VERBOSE, 1);
 293     //#endif
 294         curl_easy_setopt(cHandle,CURLOPT_USERAGENT,"mozilla/4.0");//"Mozilla/4.0 (compatible; )");
 295         curl_easy_setopt(cHandle,CURLOPT_SSL_VERIFYPEER,0);
 296         //curl_easy_setopt(cHandle,CURLOPT_SSLVERSION,1);
 297         curl_easy_setopt(cHandle,CURLOPT_URL,url);
 298         curl_easy_setopt(cHandle,CURLOPT_CONNECTTIMEOUT,10);
 299     if ( userpass != 0 && userpass[0] != 0 )
 300         curl_easy_setopt(cHandle,CURLOPT_USERPWD,userpass);
 301         if ( postfields != 0 && postfields[0] != 0 )
 302     {
 303         curl_easy_setopt(cHandle,CURLOPT_POST,1);
 304                 curl_easy_setopt(cHandle,CURLOPT_POSTFIELDS,postfields);
 305     }
 306     if ( hdr0 != NULL && hdr0[0] != 0 )
 307     {
 308         //printf("HDR0.(%s) HDR1.(%s) HDR2.(%s) HDR3.(%s)\n",hdr0!=0?hdr0:"",hdr1!=0?hdr1:"",hdr2!=0?hdr2:"",hdr3!=0?hdr3:"");
 309         headers = curl_slist_append(headers,hdr0);
 310         if ( hdr1 != 0 && hdr1[0] != 0 )
 311             headers = curl_slist_append(headers,hdr1);
 312         if ( hdr2 != 0 && hdr2[0] != 0 )
 313             headers = curl_slist_append(headers,hdr2);
 314         if ( hdr3 != 0 && hdr3[0] != 0 )
 315             headers = curl_slist_append(headers,hdr3);
 316     } //headers = curl_slist_append(0,"Expect:");
 317     if ( headers != 0 )
 318         curl_easy_setopt(cHandle,CURLOPT_HTTPHEADER,headers);
 319     //res = curl_easy_perform(cHandle);
 320     memset(&chunk,0,sizeof(chunk));
 321     curl_easy_setopt(cHandle,CURLOPT_WRITEFUNCTION,WriteMemoryCallback);
 322     curl_easy_setopt(cHandle,CURLOPT_WRITEDATA,(void *)&chunk);
 323     curl_easy_perform(cHandle);
 324     curl_easy_getinfo(cHandle,CURLINFO_RESPONSE_CODE,&code);
 325     if ( headers != 0 )
 326         curl_slist_free_all(headers);
 327     if ( code != 200 )
 328         printf("(%s) server responded with code %ld (%s)\n",url,code,chunk.memory);
 329     return(chunk.memory);
 330 }
 331
 332 char *komodo_issuemethod(char *userpass,char *method,char *params,uint16_t port)
 333 {
 334     //static void *cHandle;
 335     char url[512],*retstr=0,*retstr2=0,postdata[8192];
 336     if ( params == 0 || params[0] == 0 )
 337         params = (char *)"[]";
 338     if ( strlen(params) < sizeof(postdata)-128 )
 339     {
 340         sprintf(url,(char *)"http://127.0.0.1:%u",port);
 341         sprintf(postdata,"{\"method\":\"%s\",\"params\":%s}",method,params);
 342         //printf("postdata.(%s) USERPASS.(%s)\n",postdata,KMDUSERPASS);
 343         retstr2 = bitcoind_RPC(&retstr,(char *)"debug",url,userpass,method,params);
 344         //retstr = curl_post(&cHandle,url,USERPASS,postdata,0,0,0,0);
 345     }
 346     return(retstr2);
 347 }
 348
 349 uint32_t komodo_txtime(uint256 hash)
 350 {
 351     CTransaction tx;
 352     uint256 hashBlock;
 353     if (!GetTransaction(hash, tx,
 354 #ifndef KOMODO_ZCASH
 355                         Params().GetConsensus(),
 356 #endif
 357                         hashBlock, true))
 358     {
 359         //printf("null GetTransaction\n");
 360         return(tx.nLockTime);
 361     }
 362     return(0);
 363 }
 364
 365 uint64_t komodo_seed(int32_t height)
 366 {
 367     uint256 hash; uint64_t seed = 0; CBlockIndex *pindex = chainActive[height];
 368     if ( pindex != 0 )
 369     {
 370         hash = pindex->GetBlockHash();
 371         seed = arith_uint256(hash.GetHex()).GetLow64();
 372     }
 373     return(seed);
 374 }
 375
 376 void komodo_disconnect(CBlockIndex *pindex,CBlock& block)
 377 {
 378     char symbol[16],dest[16]; struct komodo_state *sp;
 379     komodo_init(pindex->nHeight);
 380     if ( (sp= komodo_stateptr(symbol,dest)) != 0 )
 381     {
 382         //sp->rewinding = pindex->nHeight;
 383         //fprintf(stderr,"-%d ",pindex->nHeight);
 384     } else printf("komodo_disconnect: ht.%d cant get komodo_state.(%s)\n",pindex->nHeight,ASSETCHAINS_SYMBOL);
 385 }
 386
 387 int32_t komodo_is_notarytx(const CTransaction& tx)
 388 {
 389     uint8_t *ptr,crypto777[33];
 390 #ifdef KOMODO_ZCASH
 391     ptr = (uint8_t *)tx.vout[0].scriptPubKey.data();
 392 #else
 393     ptr = (uint8_t *)&tx.vout[0].scriptPubKey[0];
 394 #endif
 395     decode_hex(crypto777,33,(char *)CRYPTO777_PUBSECPSTR);
 396     if ( memcmp(ptr+1,crypto777,33) == 0 )
 397     {
 398         //printf("found notarytx\n");
 399         return(1);
 400     }
 401     else return(0);
 402 }
 403
 404 int32_t komodo_block2height(CBlock *block)
 405 {
 406     int32_t i,n,height = 0; uint8_t *ptr;
 407 #ifdef KOMODO_ZCASH
 408     ptr = (uint8_t *)block->vtx[0].vin[0].scriptSig.data();
 409 #else
 410     ptr = (uint8_t *)&block->vtx[0].vin[0].scriptSig[0];
 411 #endif
 412     if ( block->vtx[0].vin[0].scriptSig.size() > 5 )
 413     {
 414         //for (i=0; i<6; i++)
 415         //    printf("%02x",ptr[i]);
 416         n = ptr[0];
 417         for (i=0; i<n; i++)
 418         {
 419             //03bb81000101(bb 187) (81 48001) (00 12288256)  <- coinbase.6 ht.12288256
 420             height += ((uint32_t)ptr[i+1] << (i*8));
 421             //printf("(%02x %x %d) ",ptr[i+1],((uint32_t)ptr[i+1] << (i*8)),height);
 422         }
 423         //printf(" <- coinbase.%d ht.%d\n",(int32_t)block->vtx[0].vin[0].scriptSig.size(),height);
 424     }
 425     komodo_init(height);
 426     return(height);
 427 }
 428
 429 void komodo_block2pubkey33(uint8_t *pubkey33,CBlock& block)
 430 {
 431     int32_t n;
 432 #ifdef KOMODO_ZCASH
 433     uint8_t *ptr = (uint8_t *)block.vtx[0].vout[0].scriptPubKey.data();
 434 #else
 435     uint8_t *ptr = (uint8_t *)&block.vtx[0].vout[0].scriptPubKey[0];
 436 #endif
 437     komodo_init(0);
 438     n = block.vtx[0].vout[0].scriptPubKey.size();
 439     if ( n == 35 )
 440         memcpy(pubkey33,ptr+1,33);
 441     else memset(pubkey33,0,33);
 442 }
 443
 444 int32_t komodo_blockload(CBlock& block,CBlockIndex *pindex)
 445 {
 446     block.SetNull();
 447     // Open history file to read
 448     CAutoFile filein(OpenBlockFile(pindex->GetBlockPos(),true),SER_DISK,CLIENT_VERSION);
 449     if (filein.IsNull())
 450         return(-1);
 451     // Read block
 452     try { filein >> block; }
 453     catch (const std::exception& e)
 454     {
 455         fprintf(stderr,"readblockfromdisk err B\n");
 456         return(-1);
 457     }
 458     return(0);
 459 }
 460
 461 void komodo_index2pubkey33(uint8_t *pubkey33,CBlockIndex *pindex,int32_t height)
 462 {
 463     CBlock block;
 464     komodo_init(height);
 465     memset(pubkey33,0,33);
 466     if ( pindex != 0 )
 467     {
 468         if ( komodo_blockload(block,pindex) == 0 )
 469             komodo_block2pubkey33(pubkey33,block);
 470     }
 471     else
 472     {
 473         // height -> pubkey33
 474         //printf("extending chaintip komodo_index2pubkey33 height.%d need to get pubkey33\n",height);
 475     }
 476 }
 477
 478 void komodo_connectpindex(CBlockIndex *pindex)
 479 {
 480     CBlock block;
 481     if ( komodo_blockload(block,pindex) == 0 )
 482         komodo_connectblock(pindex,block);
 483 }
 484
 485 int32_t komodo_notaries(uint8_t pubkeys[64][33],int32_t height);
 486
 487 int8_t komodo_minerid(int32_t height)
 488 {
 489     int32_t num,i; CBlockIndex *pindex; uint8_t pubkey33[33],pubkeys[64][33];
 490     if ( (pindex= chainActive[height]) != 0 )
 491     {
 492         komodo_index2pubkey33(pubkey33,pindex,height);
 493         if ( (num= komodo_notaries(pubkeys,height)) > 0 )
 494         {
 495             for (i=0; i<num; i++)
 496                 if ( memcmp(pubkeys[i],pubkey33,33) == 0 )
 497                     return(i);
 498         }
 499     }
 500     //printf("minderid not notary ht.%d\n",height);
 501     return(-1);
 502 }
 503
 504 int32_t komodo_is_special(int32_t height,uint8_t pubkey33[33])
 505 {
 506     int32_t i,notaryid,minerid;
 507     komodo_chosennotary(&notaryid,height,pubkey33);
 508     if ( height >= 34000 && notaryid >= 0 )
 509     {
 510         for (i=1; i<64; i++)
 511         {
 512             if ( komodo_minerid(height-i) == notaryid )
 513                 return(-1);
 514         }
 515         return(1);
 516     }
 517     return(0);
 518 }
 519
 520 int32_t komodo_checkpoint(int32_t *notarized_heightp,int32_t nHeight,uint256 hash)
 521 {
 522     int32_t notarized_height; uint256 notarized_hash,notarized_desttxid; CBlockIndex *notary;
 523     notarized_height = komodo_notarizeddata(chainActive.Tip()->nHeight,&notarized_hash,&notarized_desttxid);
 524     *notarized_heightp = notarized_height;
 525     if ( notarized_height >= 0 && notarized_height <= chainActive.Tip()->nHeight && (notary= mapBlockIndex[notarized_hash]) != 0 )
 526     {
 527         //printf("nHeight.%d -> (%d %s)\n",chainActive.Tip()->nHeight,notarized_height,notarized_hash.ToString().c_str());
 528         if ( notary->nHeight == notarized_height ) // if notarized_hash not in chain, reorg
 529         {
 530             if ( nHeight < notarized_height )
 531             {
 532                 fprintf(stderr,"nHeight.%d < NOTARIZED_HEIGHT.%d\n",nHeight,notarized_height);
 533                 return(-1);
 534             }
 535             else if ( nHeight == notarized_height && memcmp(&hash,&notarized_hash,sizeof(hash)) != 0 )
 536             {
 537                 fprintf(stderr,"nHeight.%d == NOTARIZED_HEIGHT.%d, diff hash\n",nHeight,notarized_height);
 538                 return(-1);
 539             }
 540         } else fprintf(stderr,"unexpected error notary_hash %s ht.%d at ht.%d\n",notarized_hash.ToString().c_str(),notarized_height,notary->nHeight);
 541     } else if ( notarized_height > 0 && notarized_height != 73880 )
 542         fprintf(stderr,"[%s] couldnt find notarized.(%s %d) ht.%d\n",ASSETCHAINS_SYMBOL,notarized_hash.ToString().c_str(),notarized_height,chainActive.Tip()->nHeight);
 543     return(0);
 544 }
 545
 546 uint32_t komodo_interest_args(int32_t *txheightp,uint32_t *tiptimep,uint64_t *valuep,uint256 hash,int32_t n)
 547 {
 548     LOCK(cs_main);
 549     CTransaction tx; uint256 hashBlock; CBlockIndex *pindex,*tipindex;
 550     if ( !GetTransaction(hash,tx,hashBlock,true) )
 551         return(0);
 552     uint32_t locktime = 0;
 553     if ( n < tx.vout.size() )
 554     {
 555         if ( (pindex= mapBlockIndex[hashBlock]) != 0 && (tipindex= chainActive.Tip()) != 0 )
 556         {
 557             *valuep = tx.vout[n].nValue;
 558             *txheightp = pindex->nHeight;
 559             *tiptimep = tipindex->nTime;
 560             locktime = tx.nLockTime;
 561             //fprintf(stderr,"tx locktime.%u %.8f height.%d | tiptime.%u\n",locktime,(double)*valuep/COIN,*txheightp,*tiptimep);
 562         }
 563     }
 564     return(locktime);
 565 }
 566
 567 uint64_t komodo_interest(int32_t txheight,uint64_t nValue,uint32_t nLockTime,uint32_t tiptime);
 568 uint64_t komodo_accrued_interest(int32_t *txheightp,uint32_t *locktimep,uint256 hash,int32_t n,int32_t checkheight,uint64_t checkvalue)
 569 {
 570     uint64_t value; uint32_t tiptime;
 571     if ( (*locktimep= komodo_interest_args(txheightp,&tiptime,&value,hash,n)) != 0 )
 572     {
 573         if ( (checkvalue == 0 || value == checkvalue) && (checkheight == 0 || *txheightp == checkheight) )
 574             return(komodo_interest(*txheightp,value,*locktimep,tiptime));
 575         //fprintf(stderr,"nValue %llu lock.%u:%u nTime.%u -> %llu\n",(long long)coins.vout[n].nValue,coins.nLockTime,timestamp,pindex->nTime,(long long)interest);
 576         else fprintf(stderr,"komodo_accrued_interest value mismatch %llu vs %llu or height mismatch %d vs %d\n",(long long)value,(long long)checkvalue,*txheightp,checkheight);
 577     }
 578     return(0);
 579 }