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425 lines
17 KiB
425 lines
17 KiB
/******************************************************************************
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* Copyright © 2014-2015 The SuperNET Developers. *
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* *
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* See the AUTHORS, DEVELOPER-AGREEMENT and LICENSE files at *
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* the top-level directory of this distribution for the individual copyright *
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* holder information and the developer policies on copyright and licensing. *
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* *
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* Unless otherwise agreed in a custom licensing agreement, no part of the *
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* SuperNET software, including this file may be copied, modified, propagated *
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* or distributed except according to the terms contained in the LICENSE file *
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* *
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* Removal or modification of this copyright notice is prohibited. *
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* *
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******************************************************************************/
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#include "iguana777.h"
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#define iguana_blockfind(coin,hash2) iguana_blockhashset(coin,-1,hash2,0)
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void _iguana_blocklink(struct iguana_info *coin,struct iguana_block *prev,struct iguana_block *block)
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{
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char str[65],str2[65]; struct iguana_block *next;
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if ( memcmp(block->RO.prev_block.bytes,prev->RO.hash2.bytes,sizeof(bits256)) != 0 )
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{
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printf("illegal blocklink mismatched hashes\n");
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exit(-1);
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return;
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}
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block->hh.prev = prev;
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if ( (next= prev->hh.next) != 0 )
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{
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if ( next != block )
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{
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if ( memcmp(next->RO.prev_block.bytes,prev->RO.hash2.bytes,sizeof(bits256)) != 0 )
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{
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printf("illegal blocklink next mismatched hashes\n");
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return;
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}
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if ( memcmp(next->RO.hash2.bytes,block->RO.hash2.bytes,sizeof(bits256)) != 0 )
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printf("blocklink collision: %s vs %s\n",bits256_str(str,block->RO.hash2),bits256_str(str2,next->RO.hash2));
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else printf("blocklink corruption: identical hashes with diff ptrs %s %p %p\n",bits256_str(str,block->RO.hash2),block,next);
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}
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prev->hh.next = block; // could make a linked list of all at same height for multibranch
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} else prev->hh.next = block;
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printf("link.(%s) -> (%s)\n",bits256_str(str,prev->RO.hash2),bits256_str(str,block->RO.hash2));
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}
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struct iguana_block *iguana_blockhashset(struct iguana_info *coin,int32_t height,bits256 hash2,int32_t createflag)
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{
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static int depth;
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struct iguana_block *block,*prev;
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if ( height > 0 && (height > coin->blocks.maxbits || depth != 0) )
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{
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printf("illegal height.%d when max.%d, depth.%d\n",height,coin->blocks.maxbits,depth);
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//getchar();
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return(0);
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}
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depth++;
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//portable_mutex_lock(&coin->blocks_mutex);
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HASH_FIND(hh,coin->blocks.hash,&hash2,sizeof(hash2),block);
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if ( block != 0 )
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{
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//portable_mutex_unlock(&coin->blocks_mutex);
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depth--;
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return(block);
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}
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if ( createflag > 0 )
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{
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block = mycalloc('y',1,sizeof(*block));
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block->RO.hash2 = hash2;
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block->hh.itemind = height, block->height = -1;
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HASH_ADD(hh,coin->blocks.hash,RO.hash2,sizeof(hash2),block);
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block->hh.next = block->hh.prev = 0;
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if ( bits256_nonz(block->RO.prev_block) > 0 )
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{
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HASH_FIND(hh,coin->blocks.hash,&block->RO.prev_block,sizeof(block->RO.prev_block),prev);
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if ( prev != 0 )
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_iguana_blocklink(coin,prev,block);
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}
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//char str[65]; printf("added.(%s) height.%d (%p %p)\n",bits256_str(str,hash2),height,block->hh.prev,block->hh.next);
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if ( 0 )
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{
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struct iguana_block *tmp;
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HASH_FIND(hh,coin->blocks.hash,&hash2,sizeof(hash2),tmp);
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char str[65];
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bits256_str(str,hash2);
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if ( tmp != block )
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printf("%s height.%d search error %p != %p\n",str,height,block,tmp);
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}
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}
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//portable_mutex_unlock(&coin->blocks_mutex);
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depth--;
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return(block);
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}
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bits256 *iguana_blockhashptr(struct iguana_info *coin,int32_t height)
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{
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int32_t i; struct iguana_bundle *bp; bits256 *hashptr;
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if ( height >= 0 )
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{
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for (i=0; i<coin->bundlescount; i++)
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{
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if ( (bp= coin->bundles[i]) != 0 )
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{
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if ( height >= bp->bundleheight && height < bp->bundleheight+bp->n )
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{
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hashptr = &bp->hashes[height - bp->bundleheight];
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//printf("i.%d hashptr.%p height.%d vs (%d %d)\n",i,hashptr,height,bp->bundleheight,bp->bundleheight+bp->n);
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return(hashptr);
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}
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}
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}
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}
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return(0);
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}
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bits256 iguana_blockhash(struct iguana_info *coin,int32_t height)
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{
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bits256 *hash2p; static const bits256 zero;
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if ( (hash2p= iguana_blockhashptr(coin,height)) != 0 )
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return(*hash2p);
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return(zero);
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}
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struct iguana_block *iguana_blockptr(struct iguana_info *coin,int32_t height)
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{
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static const bits256 zero; bits256 hash2 = iguana_blockhash(coin,height);
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if ( memcmp(zero.bytes,hash2.bytes,sizeof(zero)) != 0 )
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return(iguana_blockfind(coin,hash2));
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return(0);
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}
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int32_t iguana_blockvalidate(struct iguana_info *coin,int32_t *validp,struct iguana_block *block)
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{
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bits256 hash2; uint8_t serialized[sizeof(struct iguana_msgblock) + 4096];
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*validp = 0;
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iguana_serialize_block(&hash2,serialized,block);
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*validp = (memcmp(hash2.bytes,block->RO.hash2.bytes,sizeof(hash2)) == 0);
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block->valid = *validp;
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char str[65]; char str2[65];
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if ( *validp == 0 )
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{
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printf("iguana_blockvalidate: miscompare (%s) vs (%s)\n",bits256_str(str,hash2),bits256_str(str2,block->RO.hash2));
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return(-1);
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}
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return(0);
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}
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/*void iguana_mergeprevdep(struct iguana_prevdep *destlp,struct iguana_prevdep *srclp)
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{
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if ( srclp->numpkinds > destlp->numpkinds )
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destlp->numpkinds = srclp->numpkinds;
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if ( srclp->numtxids > destlp->numtxids )
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destlp->numtxids = srclp->numtxids;
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if ( srclp->numunspents > destlp->numunspents )
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destlp->numunspents = srclp->numunspents;
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if ( srclp->numspends > destlp->numspends )
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destlp->numspends = srclp->numspends;
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if ( srclp->PoW > destlp->PoW )
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destlp->PoW = srclp->PoW;
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}
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void iguana_blockmerge(struct iguana_block *dest,struct iguana_prevdep *destlp,struct iguana_block *block,struct iguana_prevdep *srclp)
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{
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if ( block->numvins > dest->numvins )
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dest->numvins = block->numvins;
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if ( block->numvouts > dest->numvouts )
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dest->numvouts = block->numvouts;
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if ( block->txn_count > dest->txn_count )
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dest->txn_count = block->txn_count;
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if ( dest->height == 0 )
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dest->height = block->height;
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iguana_mergeprevdep(destlp,srclp);
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}*/
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void iguana_blockconv(struct iguana_block *dest,struct iguana_msgblock *msg,bits256 hash2,int32_t height) //uint32_t numtxids,uint32_t numunspents,uint32_t numspends,double PoW)
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{
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memset(dest,0,sizeof(*dest));
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dest->RO.version = msg->H.version;
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dest->RO.prev_block = msg->H.prev_block;
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dest->RO.merkle_root = msg->H.merkle_root;
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dest->RO.timestamp = msg->H.timestamp;
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dest->RO.bits = msg->H.bits;
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dest->RO.nonce = msg->H.nonce;
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dest->RO.txn_count = msg->txn_count;
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dest->height = height;
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dest->RO.hash2 = hash2;
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}
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void iguana_blockcopy(struct iguana_info *coin,struct iguana_block *block,struct iguana_block *origblock)
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{
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block->RO.hash2 = origblock->RO.hash2;
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block->RO.prev_block = origblock->RO.prev_block;
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block->RO.merkle_root = origblock->RO.merkle_root;
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block->mainchain = origblock->mainchain;
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if ( block->fpipbits == 0 )
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block->fpipbits = origblock->fpipbits;
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if ( block->RO.timestamp == 0 )
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block->RO.timestamp = origblock->RO.timestamp;
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if ( block->RO.nonce == 0 )
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block->RO.nonce = origblock->RO.nonce;
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if ( block->RO.bits == 0 )
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block->RO.bits = origblock->RO.bits;
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if ( block->RO.txn_count == 0 )
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block->RO.txn_count = origblock->RO.txn_count;
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if ( block->RO.version == 0 )
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block->RO.version = origblock->RO.version;
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if ( block->mainchain == 0 )
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block->mainchain = origblock->mainchain;
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if ( block->valid == 0 )
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block->valid = origblock->valid;
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if ( block->RO.recvlen == 0 )
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block->RO.recvlen = origblock->RO.recvlen;
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}
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double PoW_from_compact(uint32_t nBits,uint8_t unitval) // NOT consensus safe, but most of the time will be correct
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{
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uint32_t nbytes,nbits,i,n; double PoW; uint64_t mult;
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nbytes = (nBits >> 24) & 0xFF;
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nbits = (8 * (nbytes - 3));
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PoW = (nBits & 0xFFFFFF);
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if ( nbytes > unitval )
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{
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printf("illegal nBits.%x\n",nBits);
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return(0.);
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}
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if ( (n= ((8* (unitval-3)) - nbits)) != 0 ) // 0x1d00ffff is genesis nBits so we map that to 1.
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{
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//printf("nbits.%d -> n.%d\n",nbits,n);
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if ( n < 64 )
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PoW /= (1LL << n);
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else // very rare case efficiency not issue
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{
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for (i=0; i<n; i++)
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PoW /= 2.;
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}
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}
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mult = 1;
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while ( nbytes++ < 30 )
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mult <<= 8;
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PoW = (PoW * mult) / (nBits & 0xffffff);
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//printf("nBits.%x -> %.15f diff %.15f | n.%d unitval.%d nbytes.%d\n",nBits,PoW,1./PoW,n,unitval,nbytes);
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return(PoW);
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}
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int32_t iguana_blockunmain(struct iguana_info *coin,struct iguana_block *block)
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{
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struct iguana_block *next; int32_t n = 0;
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while ( block != 0 )
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{
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//printf("n.%d %p (%p %p) mainchain.%d delink %d\n",n,block,block->hh.prev,block->hh.next,block->mainchain,block->height);
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block->mainchain = 0;
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next = block->hh.next;
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block = next;
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n++;
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}
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if ( n > 1000 )
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printf("delinked.%d\n",n);
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return(n);
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}
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struct iguana_block *_iguana_chainlink(struct iguana_info *coin,struct iguana_block *newblock)
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{
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int32_t valid,bundlei,height=-1; struct iguana_block *hwmchain,*block = 0,*prev=0,*next;
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bits256 *hash2p=0; double prevPoW = 0.;
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if ( newblock == 0 )
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return(0);
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hwmchain = &coin->blocks.hwmchain;
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if ( (block= iguana_blockfind(coin,newblock->RO.hash2)) != 0 )
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{
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if ( memcmp(coin->chain->genesis_hashdata,block->RO.hash2.bytes,sizeof(bits256)) == 0 )
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block->PoW = PoW_from_compact(block->RO.bits,coin->chain->unitval), height = 0;
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else if ( (prev= iguana_blockfind(coin,block->RO.prev_block)) != 0 )
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{
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if ( memcmp(prev->RO.hash2.bytes,coin->blocks.hwmchain.RO.hash2.bytes,sizeof(bits256)) == 0 )
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prev->mainchain = 1;
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if ( prev->valid != 0 && prev->mainchain != 0 && prev->height >= 0 )
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{
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prevPoW = prev->PoW;
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block->PoW = PoW_from_compact(block->RO.bits,coin->chain->unitval) + prevPoW;
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if ( (next= prev->hh.next) != 0 )
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{
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if ( next->mainchain != 0 && block->PoW < next->PoW )
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return(0);
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hwmchain = next;
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}
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height = prev->height + 1;
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}
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else
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{
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char str[65]; printf("(%s) notready v.%d m.%d h.%d\n",bits256_str(str,prev->RO.hash2),prev->valid,prev->mainchain,prev->height);
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return(0);
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}
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}
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else
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{
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//char str[65]; printf("chainlink error: cant find prev.(%s)\n",bits256_str(str,block->hash2));
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//getchar();
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return(0);
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}
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//char str[65]; printf("extend? %s.h%d: %.15f vs %.15f ht.%d vs %d\n",bits256_str(str,block->hash2),height,block->PoW,coin->blocks.hwmchain.PoW,height,coin->blocks.hwmchain.height);
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if ( iguana_blockvalidate(coin,&valid,newblock) < 0 || valid == 0 )
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return(0);
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block->height = height;
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block->valid = 1;
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if ( block->PoW >= hwmchain->PoW )
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{
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block->hh.prev = prev;
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if ( prev != 0 )
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{
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//if ( prev->hh.next != block )
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// iguana_blockunmain(coin,prev->hh.next);
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prev->hh.next = block;
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}
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if ( coin->isRT != 0 || block->height == hwmchain->height )
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{
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coin->blocks.maxblocks = (block->height + 1);
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coin->blocks.hwmchain = *block;
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//printf("[%s] <- ht.%d\n",bits256_str(str,block->hash2),coin->blocks.hwmheight);
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char str[65],str2[65]; bits256 zero;
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memset(&zero,0,sizeof(zero));
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bits256_str(str,newblock->RO.hash2);
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if ( hash2p != 0 )
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bits256_str(str2,*hash2p);
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else str2[0] = 0;
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if ( block->height+1 > coin->longestchain )
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coin->longestchain = block->height+1;
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if ( (block->height % 1000) == 0 )
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printf("EXTENDMAIN %s %d <- (%s) n.%u max.%u PoW %f numtx.%d valid.%d\n",str,block->height,str2,hwmchain->height+1,coin->blocks.maxblocks,block->PoW,block->RO.txn_count,block->valid);
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struct iguana_bundle *bp;
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if ( (block->height % coin->chain->bundlesize) == 0 )
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bp = iguana_bundlecreate(coin,&bundlei,block->height,block->RO.hash2,zero,0);
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else
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{
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if ( (bp= coin->bundles[block->height / coin->chain->bundlesize]) != 0 )
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{
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if ( memcmp(bp->hashes[block->height % coin->chain->bundlesize].bytes,block->RO.hash2.bytes,sizeof(bits256)) != 0 )
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{
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if ( bits256_nonz(bp->hashes[block->height % coin->chain->bundlesize]) > 0 )
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{
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printf("ERROR: need to fix up bundle for height.%d\n",block->height);
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//getchar();
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}
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bp->hashes[block->height % coin->chain->bundlesize] = block->RO.hash2;
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bp->blocks[block->height % coin->chain->bundlesize] = block;
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}
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}
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}
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if ( block->fpipbits == 0 )
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iguana_blockQ(coin,bp,block->height % coin->chain->bundlesize,block->RO.hash2,1);
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block->mainchain = 1;
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return(block);
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}
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}
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} else printf("chainlink error from block.%p\n",block);
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return(0);
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}
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void iguana_blocksetheights(struct iguana_info *coin,struct iguana_block *block)
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{
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int32_t height;
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if ( (height= block->height) < 0 )
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return;
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while ( block != 0 && block->height != height )
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{
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block->height = height;
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iguana_bundlehash2add(coin,0,coin->bundles[height/coin->chain->bundlesize],height % coin->chain->bundlesize,block->RO.hash2);
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block = block->hh.next, height++;
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}
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}
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int32_t iguana_chainextend(struct iguana_info *coin,struct iguana_block *newblock)
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{
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struct iguana_block *block,*prev; int32_t valid,oldhwm; char str[65];
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if ( iguana_blockvalidate(coin,&valid,newblock) < 0 || valid == 0 )
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{
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printf("chainextend: newblock.%s didnt validate\n",bits256_str(str,newblock->RO.hash2));
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return(-1);
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}
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else
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{
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block = iguana_blockhashset(coin,-1,newblock->RO.hash2,1);
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if ( block != newblock )
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iguana_blockcopy(coin,block,newblock);
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block->valid = 1;
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if ( block->hh.prev == 0 && (prev= iguana_blockfind(coin,block->RO.prev_block)) != 0 )
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{
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if ( prev->hh.next == 0 && block->hh.prev == 0 )
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prev->hh.next = block, block->hh.prev = prev;
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//printf("extend newblock.%s prevm.%d\n",bits256_str(str,block->prev_block),prev->mainchain);
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if ( prev->mainchain == 0 )
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{
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if ( (block= iguana_blockfind(coin,coin->blocks.hwmchain.RO.hash2)) != 0 && block->mainchain == 0 )
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{
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//printf("c hwmchain is not mainchain anymore?\n");
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prev->mainchain = 1;
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} else return(0);
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}
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}
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if ( memcmp(block->RO.prev_block.bytes,coin->blocks.hwmchain.RO.hash2.bytes,sizeof(bits256)) != 0 )
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return(0);
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}
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if ( block != 0 )
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{
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oldhwm = coin->blocks.hwmchain.height;
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//printf("link.%s\n",bits256_str(str,block->hash2));
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while ( block != 0 && memcmp(block->RO.hash2.bytes,coin->blocks.hwmchain.RO.hash2.bytes,sizeof(bits256)) != 0 && _iguana_chainlink(coin,block) == block && coin->blocks.hwmchain.height != oldhwm )
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{
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oldhwm = coin->blocks.hwmchain.height;
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block = block->hh.next;
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if ( block != 0 )
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{
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if ( bits256_nonz(block->RO.prev_block) == 0 )
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break;
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//printf("next link.%s\n",bits256_str(str,block->hash2));
|
|
}
|
|
}
|
|
}
|
|
if ( (block= iguana_blockfind(coin,coin->blocks.hwmchain.RO.hash2)) != 0 && block->mainchain == 0 )
|
|
{
|
|
printf("hwmchain is not mainchain anymore?\n");
|
|
block->mainchain = 1;
|
|
}
|
|
return(coin->blocks.hwmchain.height);
|
|
}
|
|
|