utils.gno

 1package pool
 2
 3import (
 4	"strconv"
 5	"strings"
 6
 7	ufmt "gno.land/p/nt/ufmt/v0"
 8)
 9
10const (
11	MAX_TICK            int32 = 887272
12	ENCODED_TICK_OFFSET int32 = MAX_TICK
13)
14
15// GetPoolPath generates a unique pool path string based on the token paths and fee tier.
16func GetPoolPath(token0Path, token1Path string, fee uint32) string {
17	// All the token paths in the pool are sorted in alphabetical order.
18	if strings.Compare(token1Path, token0Path) < 0 {
19		token0Path, token1Path = token1Path, token0Path
20	}
21
22	return token0Path + ":" + token1Path + ":" + strconv.FormatUint(uint64(fee), 10)
23}
24
25// EncodeTickKey encodes a tick to a string key for the tick tree.
26func EncodeTickKey(tick int32) string {
27	var buf [10]byte
28	encodeTickKeyToBuffer(buf[:], tick)
29	return string(buf[:])
30}
31
32// EncodePositionKey encodes a position range into a fixed-width 20-byte string.
33func EncodePositionKey(tickLower, tickUpper int32) string {
34	var buf [20]byte
35	encodeTickKeyToBuffer(buf[:10], tickLower)
36	encodeTickKeyToBuffer(buf[10:], tickUpper)
37	return string(buf[:])
38}
39
40func encodeTickKeyToBuffer(dst []byte, tick int32) {
41	adjustTick := tick + ENCODED_TICK_OFFSET
42	if adjustTick < 0 {
43		panic(ufmt.Sprintf("tick(%d) + ENCODED_TICK_OFFSET(%d) < 0", tick, ENCODED_TICK_OFFSET))
44	}
45
46	for i := len(dst) - 1; i >= 0; i-- {
47		dst[i] = byte('0' + adjustTick%10)
48		adjustTick /= 10
49	}
50}
51
52// DecodeTickKey decodes a string key to a tick.
53func DecodeTickKey(s string) int32 {
54	adjustTick, err := strconv.ParseInt(s, 10, 32)
55	if err != nil {
56		panic(ufmt.Sprintf("invalid tick key: %s", s))
57	}
58
59	return int32(adjustTick) - ENCODED_TICK_OFFSET
60}