Ensure ordering of address and xpub txs in the same block

api/xpub.go

@@ -34,9 +34,17 @@ type xpubTxid struct {
 
 type xpubTxids []xpubTxid
 
-func (a xpubTxids) Len() int           { return len(a) }
-func (a xpubTxids) Swap(i, j int)      { a[i], a[j] = a[j], a[i] }
-func (a xpubTxids) Less(i, j int) bool { return a[i].height >= a[j].height }
+func (a xpubTxids) Len() int      { return len(a) }
+func (a xpubTxids) Swap(i, j int) { a[i], a[j] = a[j], a[i] }
+func (a xpubTxids) Less(i, j int) bool {
+	// if the heights are equal, make inputs less than outputs
+	hi := a[i].height
+	hj := a[j].height
+	if hi == hj {
+		return (a[i].inputOutput & txInput) >= (a[j].inputOutput & txInput)
+	}
+	return hi > hj
+}
 
 type xpubAddress struct {
 	addrDesc  bchain.AddressDescriptor

db/rocksdb.go

@@ -353,37 +353,44 @@ type outpoint struct {
 	index int32
 }
 
+// TxInput holds input data of the transaction in TxAddresses
 type TxInput struct {
 	AddrDesc bchain.AddressDescriptor
 	ValueSat big.Int
 }
 
+// Addresses converts AddressDescriptor of the input to array of strings
 func (ti *TxInput) Addresses(p bchain.BlockChainParser) ([]string, bool, error) {
 	return p.GetAddressesFromAddrDesc(ti.AddrDesc)
 }
 
+// TxOutput holds output data of the transaction in TxAddresses
 type TxOutput struct {
 	AddrDesc bchain.AddressDescriptor
 	Spent    bool
 	ValueSat big.Int
 }
 
+// Addresses converts AddressDescriptor of the output to array of strings
 func (to *TxOutput) Addresses(p bchain.BlockChainParser) ([]string, bool, error) {
 	return p.GetAddressesFromAddrDesc(to.AddrDesc)
 }
 
+// TxAddresses stores transaction inputs and outputs with amounts
 type TxAddresses struct {
 	Height  uint32
 	Inputs  []TxInput
 	Outputs []TxOutput
 }
 
+// AddrBalance stores number of transactions and balances of an address
 type AddrBalance struct {
 	Txs        uint32
 	SentSat    big.Int
 	BalanceSat big.Int
 }
 
+// ReceivedSat computes received amount from total balance and sent amount
 func (ab *AddrBalance) ReceivedSat() *big.Int {
 	var r big.Int
 	r.Add(&ab.BalanceSat, &ab.SentSat)
@@ -547,15 +554,18 @@ func (d *RocksDB) processAddressesBitcoinType(block *bchain.Block, addresses add
 	return nil
 }
 
+// addToAddressesMap maintains mapping between addresses and transactions in one block
+// the method assumes that outpus in the block are processed before the inputs
+// the return value is true if the tx was processed before, to not to count the tx multiple times
 func addToAddressesMap(addresses addressesMap, strAddrDesc string, btxID []byte, index int32) bool {
-	// check that the address was used already in this block
+	// check that the address was already processed in this block
 	// if not found, it has certainly not been counted
 	at, found := addresses[strAddrDesc]
 	if found {
-		// check that the address was already used in this tx
+		// if the tx is already in the slice, append the index to the array of indexes
 		for i, t := range at {
 			if bytes.Equal(btxID, t.btxID) {
-				at[i].indexes = append(at[i].indexes, index)
+				at[i].indexes = append(t.indexes, index)
 				return true
 			}
 		}

db/rocksdb_ethereumtype.go

@@ -219,7 +219,7 @@ func (d *RocksDB) processAddressesEthereumType(block *bchain.Block, addresses ad
 				glog.Warningf("rocksdb: GetErc20FromTx %v - height %d, tx %v, transfer %v", err, block.Height, tx.Txid, t)
 				continue
 			}
-			if err = d.addToAddressesAndContractsEthereumType(from, btxID, ^int32(i), contract, addresses, addressContracts, true); err != nil {
+			if err = d.addToAddressesAndContractsEthereumType(to, btxID, int32(i), contract, addresses, addressContracts, true); err != nil {
 				return nil, err
 			}
 			eq := bytes.Equal(from, to)
@@ -227,7 +227,7 @@ func (d *RocksDB) processAddressesEthereumType(block *bchain.Block, addresses ad
 			j++
 			bc.addr = from
 			bc.contract = contract
-			if err = d.addToAddressesAndContractsEthereumType(to, btxID, int32(i), contract, addresses, addressContracts, !eq); err != nil {
+			if err = d.addToAddressesAndContractsEthereumType(from, btxID, ^int32(i), contract, addresses, addressContracts, !eq); err != nil {
 				return nil, err
 			}
 			// add to address to blockTx.contracts only if it is different from from address

db/rocksdb_test.go

@@ -484,6 +484,10 @@ func TestRocksDB_Index_BitcoinType(t *testing.T) {
 	verifyGetTransactions(t, d, dbtestdata.Addr8, 0, 1000000, []txidIndex{
 		{dbtestdata.TxidB2T2, 0},
 	}, nil)
+	verifyGetTransactions(t, d, dbtestdata.Addr6, 0, 1000000, []txidIndex{
+		{dbtestdata.TxidB2T2, ^0},
+		{dbtestdata.TxidB2T1, 0},
+	}, nil)
 	verifyGetTransactions(t, d, "mtGXQvBowMkBpnhLckhxhbwYK44Gs9eBad", 500000, 1000000, []txidIndex{}, errors.New("checksum mismatch"))
 
 	// GetBestBlock