db/prefixes/prefixes.go

@@ -555,7 +555,7 @@ type ClaimTakeoverKey struct {
 
 type ClaimTakeoverValue struct {
 	ClaimHash []byte `json:"claim_hash"`
-	Height    int32  `json:"height"`
+	Height    uint32 `json:"height"`
 }
 
 func (v *ClaimTakeoverValue) String() string {
@@ -567,6 +567,84 @@ func (v *ClaimTakeoverValue) String() string {
 	)
 }
 
+func (k *ClaimTakeoverKey) PackKey() []byte {
+	prefixLen := 1
+	nameLen := len(k.NormalizedName)
+	n := prefixLen + 2 + nameLen
+	key := make([]byte, n)
+	copy(key, k.Prefix)
+	binary.BigEndian.PutUint16(key[prefixLen:], uint16(nameLen))
+	copy(key[prefixLen+2:], []byte(k.NormalizedName))
+
+	return key
+}
+
+func (v *ClaimTakeoverValue) PackValue() []byte {
+	// b'>20sL'
+	value := make([]byte, 24)
+	copy(value, v.ClaimHash[:20])
+	binary.BigEndian.PutUint32(value[20:], uint32(v.Height))
+
+	return value
+}
+
+func ClaimTakeoverKeyPackPartialNFields(nFields int) func(*ClaimTakeoverKey) []byte {
+	return func(u *ClaimTakeoverKey) []byte {
+		return ClaimTakeoverKeyPackPartial(u, nFields)
+	}
+}
+
+func ClaimTakeoverKeyPackPartial(k *ClaimTakeoverKey, nFields int) []byte {
+	// Limit nFields between 0 and number of fields, we always at least need
+	// the prefix, and we never need to iterate past the number of fields.
+	if nFields > 1 {
+		nFields = 1
+	}
+	if nFields < 0 {
+		nFields = 0
+	}
+
+	prefixLen := 1
+	nameLen := len(k.NormalizedName)
+	var n = prefixLen
+	for i := 0; i <= nFields; i++ {
+		switch i {
+		case 1:
+			n += 2 + nameLen
+		}
+	}
+
+	key := make([]byte, n)
+
+	for i := 0; i <= nFields; i++ {
+		switch i {
+		case 0:
+			copy(key, k.Prefix)
+		case 1:
+			binary.BigEndian.PutUint16(key[prefixLen:], uint16(nameLen))
+			copy(key[prefixLen+2:], []byte(k.NormalizedName))
+		}
+	}
+
+	return key
+}
+
+func ClaimTakeoverKeyUnpack(key []byte) *ClaimTakeoverKey {
+	prefixLen := 1
+	nameLen := binary.BigEndian.Uint16(key[prefixLen:])
+	return &ClaimTakeoverKey{
+		Prefix:         key[:prefixLen],
+		NormalizedName: string(key[prefixLen+2 : prefixLen+2+int(nameLen)]),
+	}
+}
+
+func ClaimTakeoverValueUnpack(value []byte) *ClaimTakeoverValue {
+	return &ClaimTakeoverValue{
+		ClaimHash: value[:20],
+		Height:    binary.BigEndian.Uint32(value[20:]),
+	}
+}
+
 /*
 
 class PendingActivationKey(typing.NamedTuple):
@@ -1706,9 +1784,10 @@ func UnpackGenericKey(key []byte) (byte, interface{}, error) {
 	case EffectiveAmount:
 		return EffectiveAmount, EffectiveAmountKeyUnpack(key), nil
 	case ClaimExpiration:
+		return 0x0, nil, errors.Base("key unpack function for %v not implemented", firstByte)
 
 	case ClaimTakeover:
-		return 0x0, nil, errors.Base("key unpack function for %v not implemented", firstByte)
+		return ClaimTakeover, ClaimTakeoverKeyUnpack(key), nil
 	case PendingActivation:
 		return PendingActivation, PendingActivationKeyUnpack(key), nil
 	case ActivatedClaimAndSupport:
@@ -1770,9 +1849,10 @@ func UnpackGenericValue(key, value []byte) (byte, interface{}, error) {
 	case EffectiveAmount:
 		return EffectiveAmount, EffectiveAmountValueUnpack(value), nil
 	case ClaimExpiration:
+		return 0x0, nil, errors.Base("value unpack not implemented for key %v", key)
 
 	case ClaimTakeover:
-		return 0x0, nil, errors.Base("value unpack not implemented for key %v", key)
+		return ClaimTakeover, ClaimTakeoverValueUnpack(value), nil
 	case PendingActivation:
 		return PendingActivation, PendingActivationValueUnpack(value), nil
 	case ActivatedClaimAndSupport:

db/prefixes/prefixes_test.go

@@ -44,6 +44,82 @@ func testInit(filePath string) (*grocksdb.DB, [][]string, func()) {
 	return db, records, toDefer
 }
 
+func TestClaimTakeover(t *testing.T) {
+
+	filePath := "../../resources/claim_takeover.csv"
+
+	wOpts := grocksdb.NewDefaultWriteOptions()
+	db, records, toDefer := testInit(filePath)
+	defer toDefer()
+	for _, record := range records {
+		key, err := hex.DecodeString(record[0])
+		if err != nil {
+			log.Println(err)
+		}
+		val, err := hex.DecodeString(record[1])
+		if err != nil {
+			log.Println(err)
+		}
+		db.Put(wOpts, key, val)
+	}
+	// test prefix
+	options := dbpkg.NewIterateOptions().WithPrefix([]byte{prefixes.ClaimTakeover}).WithIncludeValue(true)
+	ch := dbpkg.Iter(db, options)
+	var i = 0
+	for kv := range ch {
+		// log.Println(kv.Key)
+		gotKey := kv.Key.(*prefixes.ClaimTakeoverKey).PackKey()
+
+		keyPartial1 := prefixes.ClaimTakeoverKeyPackPartial(kv.Key.(*prefixes.ClaimTakeoverKey), 1)
+
+		// Check pack partial for sanity
+		if !bytes.HasPrefix(gotKey, keyPartial1) {
+			t.Errorf("%+v should be prefix of %+v\n", keyPartial1, gotKey)
+		}
+
+		got := kv.Value.(*prefixes.ClaimTakeoverValue).PackValue()
+		wantKey, err := hex.DecodeString(records[i][0])
+		if err != nil {
+			log.Println(err)
+		}
+		want, err := hex.DecodeString(records[i][1])
+		if err != nil {
+			log.Println(err)
+		}
+		if !bytes.Equal(gotKey, wantKey) {
+			t.Errorf("gotKey: %+v, wantKey: %+v\n", got, want)
+		}
+		if !bytes.Equal(got, want) {
+			t.Errorf("got: %+v, want: %+v\n", got, want)
+		}
+		i++
+	}
+
+	// Test start / stop
+	start, err := hex.DecodeString(records[0][0])
+	if err != nil {
+		log.Println(err)
+	}
+	stop, err := hex.DecodeString(records[9][0])
+	if err != nil {
+		log.Println(err)
+	}
+	options2 := dbpkg.NewIterateOptions().WithStart(start).WithStop(stop).WithIncludeValue(true)
+	ch2 := dbpkg.Iter(db, options2)
+	i = 0
+	for kv := range ch2 {
+		got := kv.Value.(*prefixes.ClaimTakeoverValue).PackValue()
+		want, err := hex.DecodeString(records[i][1])
+		if err != nil {
+			log.Println(err)
+		}
+		if !bytes.Equal(got, want) {
+			t.Errorf("got: %+v, want: %+v\n", got, want)
+		}
+		i++
+	}
+}
+
 func TestPendingActivation(t *testing.T) {
 
 	filePath := "../../resources/pending_activation.csv"

main.go

@@ -38,7 +38,7 @@ func main() {
 
 		options := &db.IterOptions{
 			FillCache:    false,
-			Prefix:       []byte{prefixes.PendingActivation},
+			Prefix:       []byte{prefixes.ClaimTakeover},
 			Start:        nil,
 			Stop:         nil,
 			IncludeStart: true,
@@ -49,7 +49,7 @@ func main() {
 			RawValue:     true,
 		}
 
-		db.ReadWriteRawN(dbVal, options, "./resources/pending_activation.csv", 10)
+		db.ReadWriteRawN(dbVal, options, "./resources/claim_takeover.csv", 10)
 
 		return
 	}

resources/claim_takeover.csv

@@ -0,0 +1,10 @@
+50000100,a51d5c567412654e6d741114fea6fb851dec73800004831f
+50000101,11158037afca9c2efabc3dff55e352bf1f5634c50004831f
+50000102,a4a575934de77d8ec8589595d8cd91857e3cf5ba0004831f
+50000103,f595a21fb597bd030defefda3df9f8f4a3e0cb860004831f
+50000104,682ccb0518a6bd00c955949d9ef330d3ac18cb800004831f
+50000105,078a435851bf97c5cc36e8b03e3208a30d27679f0004831f
+50000106,1a4a75246a766cf21a629f619bc5bcb531de7a5a0004831f
+50000107,b144ad496b29b9c12c316f319773adcdd4c9bce20004831f
+50000108,af2a09232fc6bf664088d65da42fe0345b4589600004831f
+50000109,7b2ab15758c519116fb9ba9331a3b9ee7530831f0004831f