// Initialize Factoid Block Chain from database
func initFctChain() {
//Initialize the Admin Chain ID
fchain = new(common.FctChain)
fchain.ChainID = new(common.Hash)
fchain.ChainID.SetBytes(fct.FACTOID_CHAINID)
// get all aBlocks from db
fBlocks, _ := db.FetchAllFBlocks()
sort.Sort(util.ByFBlockIDAccending(fBlocks))
// double check the block ids
for i := 0; i < len(fBlocks); i = i + 1 {
if uint32(i) != fBlocks[i].GetDBHeight() {
panic(errors.New("BlockID does not equal index for chain:" +
fchain.ChainID.String() + " block:" +
fmt.Sprintf("%v", fBlocks[i].GetDBHeight())))
} else {
FactoshisPerCredit = fBlocks[i].GetExchRate()
common.FactoidState.SetFactoshisPerEC(FactoshisPerCredit)
// initialize the FactoidState in sequence
err := common.FactoidState.AddTransactionBlock(fBlocks[i])
if err != nil {
panic("Failed to rebuild factoid state: " + err.Error())
}
}
}
//Create an empty block and append to the chain
if len(fBlocks) == 0 || dchain.NextDBHeight == 0 {
common.FactoidState.SetFactoshisPerEC(FactoshisPerCredit)
fchain.NextBlockHeight = 0
// func GetGenesisFBlock(ftime uint64, ExRate uint64, addressCnt int, Factoids uint64 ) IFBlock {
//fchain.NextBlock = block.GetGenesisFBlock(0, FactoshisPerCredit, 10, 200000000000)
fchain.NextBlock = block.GetGenesisFBlock()
fmt.Println(fchain.NextBlock)
gb := fchain.NextBlock
// If a client, this block is going to get downloaded and added. Don't do it twice.
if nodeMode == common.SERVER_NODE {
err := common.FactoidState.AddTransactionBlock(gb)
if err != nil {
panic(err)
}
}
} else {
fchain.NextBlockHeight = dchain.NextDBHeight
common.FactoidState.ProcessEndOfBlock2(dchain.NextDBHeight)
fchain.NextBlock = common.FactoidState.GetCurrentBlock()
}
exportFctChain(fchain)
}
// build Genesis blocks
func buildGenesisBlocks() error {
//Set the timestamp for the genesis block
t, err := time.Parse(time.RFC3339, common.GENESIS_BLK_TIMESTAMP)
if err != nil {
panic("Not able to parse the genesis block time stamp")
}
dchain.NextBlock.Header.Timestamp = uint32(t.Unix() / 60)
// Allocate the first two dbentries for ECBlock and Factoid block
dchain.AddDBEntry(&common.DBEntry{}) // AdminBlock
dchain.AddDBEntry(&common.DBEntry{}) // ECBlock
dchain.AddDBEntry(&common.DBEntry{}) // Factoid block
// Entry Credit Chain
cBlock := newEntryCreditBlock(ecchain)
procLog.Debugf("buildGenesisBlocks: cBlock=%s\n", spew.Sdump(cBlock))
dchain.AddECBlockToDBEntry(cBlock)
exportECChain(ecchain)
// Admin chain
aBlock := newAdminBlock(achain)
procLog.Debugf("buildGenesisBlocks: aBlock=%s\n", spew.Sdump(aBlock))
dchain.AddABlockToDBEntry(aBlock)
exportAChain(achain)
// factoid Genesis Address
//fchain.NextBlock = block.GetGenesisFBlock(0, FactoshisPerCredit, 10, 200000000000)
fchain.NextBlock = block.GetGenesisFBlock()
FBlock := newFactoidBlock(fchain)
dchain.AddFBlockToDBEntry(FBlock)
exportFctChain(fchain)
// Directory Block chain
procLog.Debug("in buildGenesisBlocks")
dbBlock := newDirectoryBlock(dchain)
// Check block hash if genesis block
if dbBlock.DBHash.String() != common.GENESIS_DIR_BLOCK_HASH {
//Panic for Milestone 1
panic("\nGenesis block hash expected: " + common.GENESIS_DIR_BLOCK_HASH +
"\nGenesis block hash found: " + dbBlock.DBHash.String() + "\n")
}
exportDChain(dchain)
// place an anchor into btc
placeAnchor(dbBlock)
return nil
}
func (fs *FactoidState) LoadState() error {
var hashes []fct.IHash
cblk := fs.GetTransactionBlock(fct.FACTOID_CHAINID_HASH)
// If there is no head for the Factoids in the database, we have an
// uninitialized database. We need to add the Genesis Block. TODO
if cblk == nil {
cp.CP.AddUpdate(
"Creating Factoid Genesis Block", // tag
"info", // Category
"Creating the Factoid Genesis Block", // Title
"", // Msg
60) // Expire
//gb := block.GetGenesisFBlock(fs.GetTimeMilli(), 1000000,10,200000000000)
gb := block.GetGenesisFBlock()
fs.PutTransactionBlock(gb.GetHash(), gb)
fs.PutTransactionBlock(fct.FACTOID_CHAINID_HASH, gb)
err := fs.AddTransactionBlock(gb)
if err != nil {
fct.Prtln("Failed to build initial state.\n", err)
return err
}
fs.ProcessEndOfBlock()
return nil
}
blk := cblk
// First run back from the head back to the genesis block, collecting hashes.
for {
if blk == nil {
return fmt.Errorf("Block not found or not formated properly")
}
h := blk.GetHash()
for _, hash := range hashes {
if bytes.Compare(hash.Bytes(), h.Bytes()) == 0 {
return fmt.Errorf("Corrupted database; same hash found twice")
}
}
hashes = append(hashes, h)
if bytes.Compare(blk.GetPrevKeyMR().Bytes(), fct.ZERO_HASH) == 0 {
break
}
tblk := fs.GetTransactionBlock(blk.GetPrevKeyMR())
if tblk == nil {
return fmt.Errorf("Failed to find the block at height: %d", blk.GetDBHeight()-1)
}
if !bytes.Equal(tblk.GetHash().Bytes(), blk.GetPrevKeyMR().Bytes()) {
return fmt.Errorf("Hash Failure! Database must be rebuilt")
}
blk = tblk
time.Sleep(time.Second / 100)
cp.CP.AddUpdate(
"loadState",
"status", // Category
"Loading State",
fmt.Sprintf("Scanning backwards. Block: %d", blk.GetDBHeight()),
0)
}
// Now run forward, and build our accounting
for i := len(hashes) - 1; i >= 0; i-- {
blk = fs.GetTransactionBlock(hashes[i])
if blk == nil {
return fmt.Errorf("Should never happen. Block not found in the Database\n"+
"No block found for: %s", hashes[i].String())
}
err := fs.AddTransactionBlock(blk) // updates accounting for this block
if err != nil {
fct.Prtln("Failed to rebuild state.\n", err)
return err
}
time.Sleep(time.Second / 100)
cp.CP.AddUpdate(
"loadState",
"status", // Category
"Loading State",
fmt.Sprintf("Loading and Processing. Block: %d", blk.GetDBHeight()),
0)
}
fs.dbheight = blk.GetDBHeight()
fs.ProcessEndOfBlock()
return nil
}