liquidity_management.gno

 1package v1
 2
 3import (
 4	"gno.land/p/gnoswap/gnsmath"
 5	u256 "gno.land/p/gnoswap/uint256"
 6	ufmt "gno.land/p/nt/ufmt/v0"
 7	pl "gno.land/r/gnoswap/pool"
 8)
 9
10type AddLiquidityParams struct {
11	poolKey        string     // poolPath of the pool which has the position
12	tickLower      int32      // lower end of the tick range for the position
13	tickUpper      int32      // upper end of the tick range for the position
14	amount0Desired *u256.Uint // desired amount of token0 to be minted
15	amount1Desired *u256.Uint // desired amount of token1 to be minted
16	amount0Min     *u256.Uint // minimum amount of token0 to be minted
17	amount1Min     *u256.Uint // minimum amount of token1 to be minted
18	caller         address    // address to call the function
19}
20
21// addLiquidity calculates liquidity amounts and mints position tokens to a pool.
22func (p *positionV1) addLiquidity(_ int, rlm realm, params AddLiquidityParams) (*u256.Uint, *u256.Uint, *u256.Uint) {
23	sqrtPriceX96 := u256.MustFromDecimal(pl.GetSlot0SqrtPriceX96(params.poolKey))
24	sqrtRatioAX96 := gnsmath.TickMathGetSqrtRatioAtTick(params.tickLower)
25	sqrtRatioBX96 := gnsmath.TickMathGetSqrtRatioAtTick(params.tickUpper)
26
27	liquidity := gnsmath.GetLiquidityForAmounts(
28		sqrtPriceX96,
29		sqrtRatioAX96,
30		sqrtRatioBX96,
31		params.amount0Desired,
32		params.amount1Desired,
33	)
34
35	token0, token1, fee := splitOf(params.poolKey)
36	amount0Str, amount1Str := pl.Mint(
37		cross(rlm),
38		token0,
39		token1,
40		fee,
41		params.tickLower,
42		params.tickUpper,
43		liquidity.ToString(),
44		params.caller,
45	)
46
47	amount0 := u256.MustFromDecimal(amount0Str)
48	amount1 := u256.MustFromDecimal(amount1Str)
49
50	amount0Cond := amount0.Gte(params.amount0Min)
51	amount1Cond := amount1.Gte(params.amount1Min)
52
53	if !(amount0Cond && amount1Cond) {
54		panic(newErrorWithDetail(
55			errSlippage,
56			ufmt.Sprintf(
57				"Price Slippage Check(amount0(%s) >= amount0Min(%s), amount1(%s) >= amount1Min(%s))",
58				amount0Str, params.amount0Min.ToString(), amount1Str, params.amount1Min.ToString()),
59		))
60	}
61
62	return liquidity, amount0, amount1
63}