188 lines
5.7 KiB
Go
188 lines
5.7 KiB
Go
package bank
|
|
|
|
import (
|
|
"fmt"
|
|
|
|
sdk "github.com/cosmos/cosmos-sdk/types"
|
|
)
|
|
|
|
const moduleName = "bank"
|
|
|
|
func getCoins(ctx sdk.Context, am sdk.AccountMapper, addr sdk.Address) sdk.Coins {
|
|
acc := am.GetAccount(ctx, addr)
|
|
if acc == nil {
|
|
return sdk.Coins{}
|
|
}
|
|
return acc.GetCoins()
|
|
}
|
|
|
|
func setCoins(ctx sdk.Context, am sdk.AccountMapper, addr sdk.Address, amt sdk.Coins) sdk.Error {
|
|
acc := am.GetAccount(ctx, addr)
|
|
if acc == nil {
|
|
acc = am.NewAccountWithAddress(ctx, addr)
|
|
}
|
|
acc.SetCoins(amt)
|
|
am.SetAccount(ctx, acc)
|
|
return nil
|
|
}
|
|
|
|
// HasCoins returns whether or not an account has at least amt coins.
|
|
func hasCoins(ctx sdk.Context, am sdk.AccountMapper, addr sdk.Address, amt sdk.Coins) bool {
|
|
return getCoins(ctx, am, addr).IsGTE(amt)
|
|
}
|
|
|
|
// SubtractCoins subtracts amt from the coins at the addr.
|
|
func subtractCoins(ctx sdk.Context, am sdk.AccountMapper, addr sdk.Address, amt sdk.Coins) (sdk.Coins, sdk.Error) {
|
|
oldCoins := getCoins(ctx, am, addr)
|
|
newCoins := oldCoins.Minus(amt)
|
|
if !newCoins.IsNotNegative() {
|
|
return amt, sdk.ErrInsufficientCoins(fmt.Sprintf("%s < %s", oldCoins, amt))
|
|
}
|
|
err := setCoins(ctx, am, addr, newCoins)
|
|
return newCoins, err
|
|
}
|
|
|
|
// AddCoins adds amt to the coins at the addr.
|
|
func addCoins(ctx sdk.Context, am sdk.AccountMapper, addr sdk.Address, amt sdk.Coins) (sdk.Coins, sdk.Error) {
|
|
oldCoins := getCoins(ctx, am, addr)
|
|
newCoins := oldCoins.Plus(amt)
|
|
if !newCoins.IsNotNegative() {
|
|
return amt, sdk.ErrInsufficientCoins(fmt.Sprintf("%s < %s", oldCoins, amt))
|
|
}
|
|
err := setCoins(ctx, am, addr, newCoins)
|
|
return newCoins, err
|
|
}
|
|
|
|
// SendCoins moves coins from one account to another
|
|
func sendCoins(ctx sdk.Context, am sdk.AccountMapper, fromAddr sdk.Address, toAddr sdk.Address, amt sdk.Coins) sdk.Error {
|
|
_, err := subtractCoins(ctx, am, fromAddr, amt)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
_, err = addCoins(ctx, am, toAddr, amt)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// InputOutputCoins handles a list of inputs and outputs
|
|
func inputOutputCoins(ctx sdk.Context, am sdk.AccountMapper, inputs []Input, outputs []Output) sdk.Error {
|
|
for _, in := range inputs {
|
|
_, err := subtractCoins(ctx, am, in.Address, in.Coins)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
}
|
|
|
|
for _, out := range outputs {
|
|
_, err := addCoins(ctx, am, out.Address, out.Coins)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// CoinKeeper manages transfers between accounts
|
|
type CoinKeeper struct {
|
|
am sdk.AccountMapper
|
|
}
|
|
|
|
// NewCoinKeeper returns a new CoinKeeper
|
|
func NewCoinKeeper(am sdk.AccountMapper) CoinKeeper {
|
|
return CoinKeeper{am: am}
|
|
}
|
|
|
|
// GetCoins returns the coins at the addr.
|
|
func (keeper CoinKeeper) GetCoins(ctx sdk.Context, addr sdk.Address) sdk.Coins {
|
|
return getCoins(ctx, keeper.am, addr)
|
|
}
|
|
|
|
// SetCoins sets the coins at the addr.
|
|
func (keeper CoinKeeper) SetCoins(ctx sdk.Context, addr sdk.Address, amt sdk.Coins) sdk.Error {
|
|
return setCoins(ctx, keeper.am, addr, amt)
|
|
}
|
|
|
|
// HasCoins returns whether or not an account has at least amt coins.
|
|
func (keeper CoinKeeper) HasCoins(ctx sdk.Context, addr sdk.Address, amt sdk.Coins) bool {
|
|
return hasCoins(ctx, keeper.am, addr, amt)
|
|
}
|
|
|
|
// SubtractCoins subtracts amt from the coins at the addr.
|
|
func (keeper CoinKeeper) SubtractCoins(ctx sdk.Context, addr sdk.Address, amt sdk.Coins) (sdk.Coins, sdk.Error) {
|
|
return subtractCoins(ctx, keeper.am, addr, amt)
|
|
}
|
|
|
|
// AddCoins adds amt to the coins at the addr.
|
|
func (keeper CoinKeeper) AddCoins(ctx sdk.Context, addr sdk.Address, amt sdk.Coins) (sdk.Coins, sdk.Error) {
|
|
return addCoins(ctx, keeper.am, addr, amt)
|
|
}
|
|
|
|
// SendCoins moves coins from one account to another
|
|
func (keeper CoinKeeper) SendCoins(ctx sdk.Context, fromAddr sdk.Address, toAddr sdk.Address, amt sdk.Coins) sdk.Error {
|
|
return sendCoins(ctx, keeper.am, fromAddr, toAddr, amt)
|
|
}
|
|
|
|
// InputOutputCoins handles a list of inputs and outputs
|
|
func (keeper CoinKeeper) InputOutputCoins(ctx sdk.Context, inputs []Input, outputs []Output) sdk.Error {
|
|
return inputOutputCoins(ctx, keeper.am, inputs, outputs)
|
|
}
|
|
|
|
// --------------------------------------------------
|
|
|
|
// SendKeeper only allows transfers between accounts, without the possibility of creating coins
|
|
type SendKeeper struct {
|
|
am sdk.AccountMapper
|
|
}
|
|
|
|
// NewSendKeeper returns a new CoinKeeper
|
|
func NewSendKeeper(am sdk.AccountMapper) SendKeeper {
|
|
return SendKeeper{am: am}
|
|
}
|
|
|
|
// GetCoins returns the coins at the addr.
|
|
func (keeper SendKeeper) GetCoins(ctx sdk.Context, addr sdk.Address) sdk.Coins {
|
|
return getCoins(ctx, keeper.am, addr)
|
|
}
|
|
|
|
// HasCoins returns whether or not an account has at least amt coins.
|
|
func (keeper SendKeeper) HasCoins(ctx sdk.Context, addr sdk.Address, amt sdk.Coins) bool {
|
|
return hasCoins(ctx, keeper.am, addr, amt)
|
|
}
|
|
|
|
// SendCoins moves coins from one account to another
|
|
func (keeper SendKeeper) SendCoins(ctx sdk.Context, fromAddr sdk.Address, toAddr sdk.Address, amt sdk.Coins) sdk.Error {
|
|
return sendCoins(ctx, keeper.am, fromAddr, toAddr, amt)
|
|
}
|
|
|
|
// InputOutputCoins handles a list of inputs and outputs
|
|
func (keeper SendKeeper) InputOutputCoins(ctx sdk.Context, inputs []Input, outputs []Output) sdk.Error {
|
|
return inputOutputCoins(ctx, keeper.am, inputs, outputs)
|
|
}
|
|
|
|
// --------------------------------------------------
|
|
|
|
// ViewKeeper only allows reading of balances
|
|
type ViewKeeper struct {
|
|
am sdk.AccountMapper
|
|
}
|
|
|
|
// NewViewKeeper returns a new CoinKeeper
|
|
func NewViewKeeper(am sdk.AccountMapper) ViewKeeper {
|
|
return ViewKeeper{am: am}
|
|
}
|
|
|
|
// GetCoins returns the coins at the addr.
|
|
func (keeper ViewKeeper) GetCoins(ctx sdk.Context, addr sdk.Address) sdk.Coins {
|
|
return getCoins(ctx, keeper.am, addr)
|
|
}
|
|
|
|
// HasCoins returns whether or not an account has at least amt coins.
|
|
func (keeper ViewKeeper) HasCoins(ctx sdk.Context, addr sdk.Address, amt sdk.Coins) bool {
|
|
return hasCoins(ctx, keeper.am, addr, amt)
|
|
}
|