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bitcoin.go
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bitcoin.go
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package bitcoin
import (
"fmt"
"time"
"github.com/FactomProject/anchormaker/config"
"github.com/FactomProject/anchormaker/database"
"github.com/FactomProject/factomd/common/primitives"
)
var IgnoreWrongEntries bool = true
func LoadConfig(c *config.AnchorConfig) {
err := InitRPCClient(c)
if err != nil {
panic(err)
}
}
func SynchronizeBitcoinData(dbo *database.AnchorDatabaseOverlay) (int, error) {
txCount := 0
fmt.Println("SynchronizeBitcoinData")
for {
ps, err := dbo.FetchProgramState()
if err != nil {
return 0, err
}
fmt.Printf("LastBitcoinBlockChecked - %v\n", ps.LastBitcoinBlockChecked)
txs, newBlock, err := ListBitcoinTransactionsSinceBlock(ps.LastBitcoinBlockChecked)
if err != nil {
return 0, err
}
if len(txs) == 0 {
break
}
fmt.Printf("Bitcoin Tx count - %v\n", len(txs))
for _, tx := range txs {
txCount++
if tx.IsOurs(BTCAddress) == false {
fmt.Printf("Not from our address - %v\n", tx.String())
//ignoring transactions that are not ours
continue
}
dbHeight, keyMR := tx.GetAnchorData()
fmt.Printf("height, key - %v, %v\n", dbHeight, keyMR)
if keyMR == "" {
//ignoring transactions that don't have data
continue
}
ad, err := dbo.FetchAnchorData(dbHeight)
if err != nil {
return 0, err
}
if ad == nil {
if IgnoreWrongEntries == false {
return 0, fmt.Errorf("We have anchored block from outside of our DB")
} else {
continue
}
}
if ad.DBlockKeyMR != keyMR {
fmt.Printf("ad.DBlockKeyMR != keyMR - %v vs %v\n", ad.DBlockKeyMR, keyMR)
//return fmt.Errorf("We have anchored invalid KeyMR")
continue
}
if ad.BitcoinRecordHeight > 0 {
continue
}
if ad.Bitcoin.BlockHash != "" {
continue
}
ad.Bitcoin.Address = BTCAddress
ad.Bitcoin.TXID = tx.GetHash()
ad.Bitcoin.BlockHeight = tx.GetBlockNumber()
ad.Bitcoin.BlockHash = tx.GetBlockHash()
ad.Bitcoin.Offset = tx.GetTransactionIndex()
fmt.Printf("Saving anchored - %v, %v\n", ad.DBlockHeight, ad.DBlockKeyMR)
err = dbo.InsertAnchorData(ad, false)
if err != nil {
return 0, err
}
}
fmt.Printf("LastBlock - %v\n", newBlock)
ps.LastBitcoinBlockChecked = newBlock
err = dbo.InsertProgramState(ps)
if err != nil {
return 0, err
}
}
return txCount, nil
}
func AnchorBlocksIntoBitcoin(dbo *database.AnchorDatabaseOverlay) error {
fmt.Println("AnchorBlocksIntoBitcoin")
UpdateFee()
ad, err := dbo.FetchAnchorDataHead()
if err != nil {
return err
}
var height uint32
if ad == nil {
height = 0
} else {
height = ad.DBlockHeight + 1
}
ps, err := dbo.FetchProgramState()
if err != nil {
return err
}
//We first anchor the newest block before proceeding to anchor older blocks
_, _, err = AnchorBlockByHeight(dbo, ps.LastFactomDBlockHeightChecked)
if err != nil {
return err
}
for i := 0; i < 10; {
done, skip, err := AnchorBlockByHeight(dbo, height)
if err != nil {
return err
}
if done == true {
return nil
}
height++
if skip == true {
continue
}
i++
}
return nil
}
//returns done when we're done anchoring
//returns skip if we can skip anchoring this block
func AnchorBlockByHeight(dbo *database.AnchorDatabaseOverlay, height uint32) (done bool, skip bool, err error) {
ad, err := dbo.FetchAnchorData(height)
if err != nil {
done = true
skip = false
return
}
if ad == nil {
done = true
skip = false
return
}
if ad.Bitcoin.TXID != "" {
done = false
skip = true
return
}
fmt.Printf("Anchoring %v\n", height)
time.Sleep(5 * time.Second)
h, err := primitives.NewShaHashFromStr(ad.DBlockKeyMR)
if err != nil {
done = true
skip = false
return
}
tx, err := SendRawTransactionToBTC(h.String(), ad.DBlockHeight)
if err != nil {
done = true
skip = false
return
}
if tx == "" {
//No error, but couldn't anchor, will try later.
done = true
skip = false
return
}
fmt.Printf("Anchored %v\n\n", height)
ad.Bitcoin.TXID = tx
err = dbo.InsertAnchorData(ad, false)
if err != nil {
done = true
skip = false
return
}
done = false
skip = false
return
}