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bondingfunctions.go
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bondingfunctions.go
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package types
import (
"fmt"
"math"
sdk "github.com/cosmos/cosmos-sdk/types"
)
// "fmt"
// "github.com/ixofoundation/ixo-blockchain/x/bonds/types"
func toPercentage(f float64) float64 { return f / 100 }
func ConvertFloat64ToDec(f float64) (sdk.Dec, error) {
s := fmt.Sprintf("%.18f", f)
fmt.Println(f)
dec, err := sdk.NewDecFromStr(s)
if err != nil {
fmt.Println(err)
return sdk.Dec{}, err
}
return dec, nil
}
type BondingAlgorithm interface {
recalculate() error
Init(Bond) error
Revision() int64
CalculatePriceForTokens(price sdk.Coin) (sdk.DecCoin, error)
CalculateTokensForPrice(price sdk.Coin) (sdk.DecCoin, error)
ExportToMap() map[string]float64
ExportToBond(bond *Bond) error
}
// type AugmentedBondRevision interface {
// init() error
// recalculate() error
// UpdateAlpha(float64) error
// }
type AugmentedBondRevision1 struct {
_m float64 // CurrentSupply
_M float64 // Max Supply
_C float64 // Outcome Payment
_T float64 // Time to Maturity
_R float64 // Current Reserve
// Issuance
_F float64 // Targeted Funding
_Fi float64 // Targeted Funding
_Mh float64 // Hatch Supply
_Ph float64 // Fixed hatch price
_Mi float64 // Hatch Supply
_APYmin float64 // Minimum APY
_APYavg float64 // Minimum APY
_APYmax float64 // Maximum APY
// Initialization
// _theta float64 // Theta
_a float64 // System Alpha
_a0 float64 // Initial System Alpha
_g float64 // System Gamma
_ap float64 // System Alpha Public
_ap0 float64 // Intial Alpha Public
_t float64 // Time
_r float64 // Discounting rate
// _p1 sdk.Dec // Maximum Price
_Pmin float64 // Minimum Price
_Pavg float64 // Average Price
_Pmax float64 // Maximum Price
_kappa float64
_B float64 // Beta (Shape of the curve)
}
func (algo *AugmentedBondRevision1) recalculate() error {
algo._Mi = algo._M - algo._Mh
algo._Fi = algo._F - (algo._Mi * algo._Ph)
algo._a0 = math.Exp(-1 * (algo._APYmin - algo._r) * algo._T)
algo._kappa = (algo._a / algo._a0) * math.Exp(algo._r*algo._t)
//TODO: work need here
algo._Pavg = algo._kappa * algo._Fi / algo._Mi
algo._APYavg = -1 * (math.Log(algo._Pavg * algo._M / algo._C)) / algo._T
// bond._Pmax = bond._M * bond._C
algo._Pmax = algo._kappa * math.Exp(-1*algo._APYmin*algo._T) * (algo._C / algo._M)
algo._Pmin = algo._kappa * math.Exp(-1*algo._APYmax*algo._T) * (algo._C / algo._M)
algo._B = (algo._Pmax - algo._Pavg) / (algo._Pavg - algo._Pmin)
return nil
}
func (algo *AugmentedBondRevision1) ExportToMap() map[string]float64 {
return map[string]float64{
"m": algo._m,
"M": algo._M,
"C": algo._C,
"T": algo._T,
"R": algo._R,
"F": algo._F,
"Fi": algo._Fi,
"Mh": algo._Mh,
"Ph": algo._Ph,
"Mi": algo._Mi,
"APYmin": algo._APYmin,
"APYavg": algo._APYavg,
"APYmax": algo._APYmax,
"a": algo._a,
"a0": algo._a0,
"g": algo._g,
"ap": algo._ap,
"ap0": algo._ap0,
"t": algo._t,
"r": algo._r,
"Pmin": algo._Pmin,
"Pavg": algo._Pavg,
"Pmax": algo._Pmax,
"kappa": algo._kappa,
"B": algo._B,
}
}
func (algo *AugmentedBondRevision1) ExportToBond(bond *Bond) error {
valueOrError := RightFlatMap(FromError(ConvertFloat64ToDec(algo._ap)), func(ap sdk.Dec) Either[error, bool] {
return RightFlatMap(FromError(ConvertFloat64ToDec(algo._a)), func(a sdk.Dec) Either[error, bool] {
bond.FunctionParameters.ReplaceParam("PUBLIC_ALPHA", ap)
bond.FunctionParameters.ReplaceParam("SYSTEM_ALPHA", a)
return Right[error](true)
})
})
if !valueOrError.IsRight() {
return valueOrError.Left()
}
return nil
}
func (algo *AugmentedBondRevision1) Revision() int64 { return 1 }
func (algo *AugmentedBondRevision1) Init(bond Bond) error {
params := bond.FunctionParameters.AsMap()
bondReserve := func() (total sdk.Int) {
// for _, coin := range bond.CurrentReserve {
// total.Add(coin.Amount)
// }
return bond.CurrentReserve[0].Amount
}
// Check Revision
if rev, exists := params["REVISION"]; !exists {
return fmt.Errorf("REVISION not found in bond function parameters")
} else if rev.TruncateInt64() != algo.Revision() {
return fmt.Errorf("REVISION in bond function parameters is not %d", algo.Revision())
}
var valueOrError Either[error, bool] = RightFlatMap(FromError(bond.CurrentSupply.Amount.ToDec().Float64()), func(_m float64) Either[error, bool] {
return RightFlatMap(FromError(bond.MaxSupply.Amount.ToDec().Float64()), func(_M float64) Either[error, bool] {
return RightFlatMap(FromError(bond.OutcomePayment.ToDec().Float64()), func(_C float64) Either[error, bool] {
return RightFlatMap(FromError(bondReserve().ToDec().Float64()), func(_R float64) Either[error, bool] {
return RightFlatMap(FromError(params["Funding_Target"].Float64()), func(_F float64) Either[error, bool] {
return RightFlatMap(FromError(params["Hatch_Supply"].Float64()), func(_Mh float64) Either[error, bool] {
return RightFlatMap(FromError(params["Hatch_Price"].Float64()), func(_Ph float64) Either[error, bool] {
return RightFlatMap(FromError(params["APY_MAX"].Float64()), func(_APYmax float64) Either[error, bool] {
return RightFlatMap(FromError(params["APY_MIN"].Float64()), func(_APYmin float64) Either[error, bool] {
return RightFlatMap(FromError(params["DISCOUNT_RATE"].Float64()), func(_r float64) Either[error, bool] {
return RightFlatMap(FromError(params["MATURITY"].Float64()), func(_T float64) Either[error, bool] {
return RightFlatMap(FromError(params["GAMMA"].Float64()), func(_g float64) Either[error, bool] {
return RightFlatMap(FromError(params["INITIAL_PUBLIC_ALPHA"].Float64()), func(_ap0 float64) Either[error, bool] {
algo._m = _m
algo._M = _M
algo._C = _C
algo._R = _R
algo._F = _F
algo._Mh = _Mh
algo._Ph = _Ph
algo._T = _T
algo._g = _g
algo._APYmax = toPercentage(_APYmax)
algo._APYmin = toPercentage(_APYmin)
algo._r = toPercentage(_r)
// algo._theta = toPercentage2(_theta)
algo._ap0 = toPercentage(_ap0)
algo._t = 0
return Right[error](true)
})
})
})
})
})
})
})
})
})
})
})
})
})
if !valueOrError.IsRight() {
return valueOrError.Left()
}
// Initialize the initial alpha0
algo._a0 = math.Exp(-1 * (algo._APYmin - algo._r) * algo._T)
var err error
algo._ap, err = func() (float64, error) {
if _paDec, exists := params["PUBLIC_ALPHA"]; exists {
_pa, err := _paDec.Float64()
return _pa, err
} else {
return algo._ap0, nil
}
}()
if err != nil {
return err
}
algo._a, err = func() (float64, error) {
if _aDec, exists := params["SYSTEM_ALPHA"]; exists {
_a, err := _aDec.Float64()
return _a, err
} else {
return algo._a0, nil
}
}()
if err != nil {
return err
}
return algo.recalculate()
}
func (algo *AugmentedBondRevision1) UpdateAlpha(_ap, _delta float64) error {
if _ap < 0 {
return fmt.Errorf("alpha is smaller than 0 and must be greater than or equal to 0 and smaller than or equal to 1")
}
if _ap > 1 {
return fmt.Errorf("alpha is larger than 1 and must be greater than or equal to 0 and smaller than or equal to 1")
}
gamma1 := algo._g * (1 - (1 / algo._a0)) / (1 - (1 / algo._ap0))
alpha_new := func() float64 {
if _ap <= algo._ap0 {
return algo._a0 * math.Pow((_ap/algo._ap0), gamma1)
} else {
return 1 - (1-algo._a0)*math.Pow((1-_ap)/(1-algo._ap0), algo._g)
}
}()
algo._a = (_delta * alpha_new) + (1-_delta)*algo._a
return algo.recalculate()
}
func (algo *AugmentedBondRevision1) CalculatePriceForTokens(price sdk.Coin) (sdk.DecCoin, error) {
// if !alphaBond.AlphaBond {
// return types.Price{}, errors.New("not an alpha bond")
// }
_mh := float64(0)
// _dm, _ := price.Amount.ToDec().Float64()
calc := (algo._Mh - _mh)
dec, _ := ConvertFloat64ToDec(calc)
return sdk.NewDecCoinFromDec(price.Denom, dec), nil
}
func (algo *AugmentedBondRevision1) CalculateTokensForPrice(price sdk.Coin) (sdk.DecCoin, error) {
// if !bond.AlphaBond {
// // return types.Price{}, errors.New("not an alpha bond")
// }
_dm, _ := price.Amount.ToDec().Float64()
calc := (_dm * algo._Pmin) + (((algo._Mi * (algo._Pmax - algo._Pmin)) / (algo._B + 1)) * (math.Pow(((algo._m+_dm)/algo._Mi), (algo._B+1)) - math.Pow((algo._m/algo._M), (algo._B+1))))
dec, _ := ConvertFloat64ToDec(calc)
return sdk.NewDecCoinFromDec(price.Denom, dec), nil
}