db/prefixes/prefixes.go

@@ -477,12 +477,96 @@ class ClaimToSupportValue(typing.NamedTuple):
 type ClaimToSupportKey struct {
 	Prefix    []byte `json:"prefix"`
 	ClaimHash []byte `json:"claim_hash"`
-	TxNum     int32  `json:"tx_num"`
-	Position  int32  `json:"position"`
+	TxNum     uint32 `json:"tx_num"`
+	Position  uint16 `json:"position"`
 }
 
 type ClaimToSupportValue struct {
-	Amount int32 `json:"amount"`
+	Amount uint64 `json:"amount"`
+}
+
+func (k *ClaimToSupportKey) PackKey() []byte {
+	prefixLen := 1
+	// b'>20sLH'
+	n := prefixLen + 20 + 4 + 2
+	key := make([]byte, n)
+	copy(key, k.Prefix)
+	copy(key[prefixLen:], k.ClaimHash[:20])
+	binary.BigEndian.PutUint32(key[prefixLen+20:], k.TxNum)
+	binary.BigEndian.PutUint16(key[prefixLen+24:], k.Position)
+
+	return key
+}
+
+func (v *ClaimToSupportValue) PackValue() []byte {
+	value := make([]byte, 8)
+	binary.BigEndian.PutUint64(value, v.Amount)
+
+	return value
+}
+
+func ClaimToSupportKeyPackPartialNFields(nFields int) func(*ClaimToSupportKey) []byte {
+	return func(u *ClaimToSupportKey) []byte {
+		return ClaimToSupportKeyPackPartial(u, nFields)
+	}
+}
+
+func ClaimToSupportKeyPackPartial(k *ClaimToSupportKey, 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 > 3 {
+		nFields = 3
+	}
+	if nFields < 0 {
+		nFields = 0
+	}
+
+	// b'>4sLH'
+	prefixLen := 1
+	var n = prefixLen
+	for i := 0; i <= nFields; i++ {
+		switch i {
+		case 1:
+			n += 20
+		case 2:
+			n += 4
+		case 3:
+			n += 2
+		}
+	}
+
+	key := make([]byte, n)
+
+	for i := 0; i <= nFields; i++ {
+		switch i {
+		case 0:
+			copy(key, k.Prefix)
+		case 1:
+			copy(key[prefixLen:], k.ClaimHash)
+		case 2:
+			binary.BigEndian.PutUint32(key[prefixLen+20:], k.TxNum)
+		case 3:
+			binary.BigEndian.PutUint16(key[prefixLen+24:], k.Position)
+		}
+	}
+
+	return key
+}
+
+func ClaimToSupportKeyUnpack(key []byte) *ClaimToSupportKey {
+	prefixLen := 1
+	return &ClaimToSupportKey{
+		Prefix:    key[:prefixLen],
+		ClaimHash: key[prefixLen : prefixLen+20],
+		TxNum:     binary.BigEndian.Uint32(key[prefixLen+20:]),
+		Position:  binary.BigEndian.Uint16(key[prefixLen+24:]),
+	}
+}
+
+func ClaimToSupportValueUnpack(value []byte) *ClaimToSupportValue {
+	return &ClaimToSupportValue{
+		Amount: binary.BigEndian.Uint64(value),
+	}
 }
 
 /*
@@ -1938,7 +2022,7 @@ func UnpackGenericKey(key []byte) (byte, interface{}, error) {
 	firstByte := key[0]
 	switch firstByte {
 	case ClaimToSupport:
-		return 0x0, nil, errors.Base("key unpack function for %v not implemented", firstByte)
+		return ClaimToSupport, ClaimToSupportKeyUnpack(key), nil
 	case SupportToClaim:
 		return SupportToClaim, SupportToClaimKeyUnpack(key), nil
 
@@ -2006,7 +2090,7 @@ func UnpackGenericValue(key, value []byte) (byte, interface{}, error) {
 	firstByte := key[0]
 	switch firstByte {
 	case ClaimToSupport:
-		return 0x0, nil, errors.Base("value unpack not implemented for key %v", key)
+		return ClaimToSupport, ClaimToSupportValueUnpack(value), nil
 	case SupportToClaim:
 		return SupportToClaim, SupportToClaimValueUnpack(value), nil
 

db/prefixes/prefixes_test.go

@@ -44,6 +44,90 @@ func testInit(filePath string) (*grocksdb.DB, [][]string, func()) {
 	return db, records, toDefer
 }
 
+func TestClaimToSupport(t *testing.T) {
+
+	filePath := "../../resources/claim_to_support.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.ClaimToSupport}).WithIncludeValue(true)
+	ch := dbpkg.Iter(db, options)
+	var i = 0
+	for kv := range ch {
+		// log.Println(kv.Key)
+		gotKey := kv.Key.(*prefixes.ClaimToSupportKey).PackKey()
+
+		keyPartial1 := prefixes.ClaimToSupportKeyPackPartial(kv.Key.(*prefixes.ClaimToSupportKey), 1)
+		keyPartial2 := prefixes.ClaimToSupportKeyPackPartial(kv.Key.(*prefixes.ClaimToSupportKey), 2)
+		keyPartial3 := prefixes.ClaimToSupportKeyPackPartial(kv.Key.(*prefixes.ClaimToSupportKey), 3)
+
+		// Check pack partial for sanity
+		if !bytes.HasPrefix(gotKey, keyPartial1) {
+			t.Errorf("%+v should be prefix of %+v\n", keyPartial1, gotKey)
+		}
+		if !bytes.HasPrefix(gotKey, keyPartial2) {
+			t.Errorf("%+v should be prefix of %+v\n", keyPartial2, gotKey)
+		}
+		if !bytes.HasPrefix(gotKey, keyPartial3) {
+			t.Errorf("%+v should be prefix of %+v\n", keyPartial3, gotKey)
+		}
+
+		got := kv.Value.(*prefixes.ClaimToSupportValue).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.ClaimToSupportValue).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 TestSupportToClaim(t *testing.T) {
 
 	filePath := "../../resources/support_to_claim.csv"

main.go

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

resources/claim_to_support.csv

@@ -0,0 +1,10 @@
+4b00000324e40fcb63a0b517a3660645e9bd99244a030bc8a50000,0000000001312d00
+4b000023415fc7ba8a470f0cdf4a66bffacd5ba97902c6e2aa0126,0000000001ea252a
+4b000023415fc7ba8a470f0cdf4a66bffacd5ba97902c6e7d20151,0000000005be6f7e
+4b000023415fc7ba8a470f0cdf4a66bffacd5ba97902c6eeb6014d,0000000001eac106
+4b000023415fc7ba8a470f0cdf4a66bffacd5ba97902c6eed00037,0000000001eac106
+4b000023415fc7ba8a470f0cdf4a66bffacd5ba97902c6f4f00133,0000000001eac106
+4b000023415fc7ba8a470f0cdf4a66bffacd5ba97902c6f4f001e5,0000000001eac106
+4b000023415fc7ba8a470f0cdf4a66bffacd5ba97902c6f9b6013e,0000000001eac106
+4b000023415fc7ba8a470f0cdf4a66bffacd5ba97902c6f9b7012f,0000000003d5820c
+4b000023415fc7ba8a470f0cdf4a66bffacd5ba97902c6f9b9001c,0000000003d5820c