/
token.go
203 lines (172 loc) · 4.31 KB
/
token.go
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package types
import (
"encoding/json"
"math/big"
"strconv"
"github.com/gogo/protobuf/proto"
"gopkg.in/yaml.v2"
sdk "github.com/cosmos/cosmos-sdk/types"
sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
)
var (
_ proto.Message = &Token{}
tenInt = big.NewInt(10)
)
// TokenI defines an interface for Token
type TokenI interface {
GetSymbol() string
GetName() string
GetScale() uint32
GetMinUnit() string
GetInitialSupply() uint64
GetMaxSupply() uint64
GetMintable() bool
GetOwner() sdk.AccAddress
ToMainCoin(coin sdk.Coin) (sdk.DecCoin, error)
ToMinCoin(coin sdk.DecCoin) (sdk.Coin, error)
}
// NewToken constructs a new Token instance
func NewToken(
symbol string,
name string,
minUnit string,
scale uint32,
initialSupply,
maxSupply uint64,
mintable bool,
owner sdk.AccAddress,
) Token {
if maxSupply == 0 {
if mintable {
maxSupply = MaximumMaxSupply
} else {
maxSupply = initialSupply
}
}
return Token{
Symbol: symbol,
Name: name,
MinUnit: minUnit,
Scale: scale,
InitialSupply: initialSupply,
MaxSupply: maxSupply,
Mintable: mintable,
Owner: owner.String(),
}
}
// GetSymbol implements exported.TokenI
func (t Token) GetSymbol() string {
return t.Symbol
}
// GetName implements exported.TokenI
func (t Token) GetName() string {
return t.Name
}
// GetScale implements exported.TokenI
func (t Token) GetScale() uint32 {
return t.Scale
}
// GetMinUnit implements exported.TokenI
func (t Token) GetMinUnit() string {
return t.MinUnit
}
// GetInitialSupply implements exported.TokenI
func (t Token) GetInitialSupply() uint64 {
return t.InitialSupply
}
// GetMaxSupply implements exported.TokenI
func (t Token) GetMaxSupply() uint64 {
return t.MaxSupply
}
// GetMintable implements exported.TokenI
func (t Token) GetMintable() bool {
return t.Mintable
}
// GetOwner implements exported.TokenI
func (t Token) GetOwner() sdk.AccAddress {
owner, _ := sdk.AccAddressFromBech32(t.Owner)
return owner
}
func (t Token) String() string {
bz, _ := yaml.Marshal(t)
return string(bz)
}
// ToMainCoin returns the main denom coin from args
func (t Token) ToMainCoin(coin sdk.Coin) (sdk.DecCoin, error) {
if t.Symbol != coin.Denom && t.MinUnit != coin.Denom {
return sdk.NewDecCoinFromDec(coin.Denom, sdk.ZeroDec()), sdkerrors.Wrapf(ErrTokenNotExists, "token not match")
}
if t.Symbol == coin.Denom {
return sdk.NewDecCoin(coin.Denom, coin.Amount), nil
}
precision := new(big.Int).Exp(tenInt, big.NewInt(int64(t.Scale)), nil)
// dest amount = src amount / 10^(scale)
amount := sdk.NewDecFromInt(coin.Amount).Quo(sdk.NewDecFromBigInt(precision))
return sdk.NewDecCoinFromDec(t.Symbol, amount), nil
}
// ToMinCoin returns the min denom coin from args
func (t Token) ToMinCoin(coin sdk.DecCoin) (newCoin sdk.Coin, err error) {
if t.Symbol != coin.Denom && t.MinUnit != coin.Denom {
return sdk.NewCoin(coin.Denom, sdk.ZeroInt()), sdkerrors.Wrapf(ErrTokenNotExists, "token not match")
}
if t.MinUnit == coin.Denom {
return sdk.NewCoin(coin.Denom, coin.Amount.TruncateInt()), nil
}
precision := new(big.Int).Exp(tenInt, big.NewInt(int64(t.Scale)), nil)
// dest amount = src amount * 10^(dest scale)
amount := coin.Amount.Mul(sdk.NewDecFromBigInt(precision))
return sdk.NewCoin(t.MinUnit, amount.TruncateInt()), nil
}
type Bool string
const (
False Bool = "false"
True Bool = "true"
Nil Bool = ""
)
func (b Bool) ToBool() bool {
v := string(b)
if len(v) == 0 {
return false
}
result, _ := strconv.ParseBool(v)
return result
}
func (b Bool) String() string {
return string(b)
}
// Marshal needed for protobuf compatibility
func (b Bool) Marshal() ([]byte, error) {
return []byte(b), nil
}
// Unmarshal needed for protobuf compatibility
func (b *Bool) Unmarshal(data []byte) error {
*b = Bool(data[:])
return nil
}
// Marshals to JSON using string
func (b Bool) MarshalJSON() ([]byte, error) {
return json.Marshal(b.String())
}
// UnmarshalJSON from using string
func (b *Bool) UnmarshalJSON(data []byte) error {
var s string
err := json.Unmarshal(data, &s)
if err != nil {
return err
}
*b = Bool(s)
return nil
}
func ParseBool(v string) (Bool, error) {
if len(v) == 0 {
return Nil, nil
}
result, err := strconv.ParseBool(v)
if err != nil {
return Nil, err
}
if result {
return True, nil
}
return False, nil
}