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fantoken.go
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fantoken.go
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package keeper
import (
gogotypes "github.com/gogo/protobuf/types"
sdk "github.com/cosmos/cosmos-sdk/types"
sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
"github.com/furyaoff/fanfury/x/fantoken/types"
)
// GetFanTokens returns all existing fantokens
func (k Keeper) GetFanTokens(ctx sdk.Context, owner sdk.AccAddress) (fantokens []types.FanToken) {
store := ctx.KVStore(k.storeKey)
var it sdk.Iterator
if owner == nil {
it = sdk.KVStorePrefixIterator(store, types.PrefixFanTokenForDenom)
defer it.Close()
for ; it.Valid(); it.Next() {
var fantoken types.FanToken
k.cdc.MustUnmarshal(it.Value(), &fantoken)
fantokens = append(fantokens, fantoken)
}
return
}
it = sdk.KVStorePrefixIterator(store, types.KeyFanTokens(owner, ""))
defer it.Close()
for ; it.Valid(); it.Next() {
var denom gogotypes.StringValue
k.cdc.MustUnmarshal(it.Value(), &denom)
fantoken, err := k.getFanTokenByDenom(ctx, denom.Value)
if err != nil {
continue
}
fantokens = append(fantokens, fantoken)
}
return
}
// GetFanToken returns the fantoken of the specified denom
func (k Keeper) GetFanToken(ctx sdk.Context, denom string) (*types.FanToken, error) {
// query fantoken by denom
if fantoken, err := k.getFanTokenByDenom(ctx, denom); err == nil {
return &fantoken, nil
}
return nil, sdkerrors.Wrapf(types.ErrFanTokenNotExists, "denom %s does not exist", denom)
}
// AddFanToken saves a new token
func (k Keeper) AddFanToken(ctx sdk.Context, token *types.FanToken) error {
if k.HasFanToken(ctx, token.GetDenom()) {
return sdkerrors.Wrapf(types.ErrDenomAlreadyExists, "denom already exists: %s", token.GetDenom())
}
// set token
k.setFanToken(ctx, token)
if len(token.MetaData.Authority) != 0 {
// set token to be prefixed with metadata authority
k.setWithMetadataAuthority(ctx, token.GetAuthority(), token.GetDenom())
}
return nil
}
// getFanTokenSupply queries the fantoken supply from the total supply
func (k Keeper) getFanTokenSupply(ctx sdk.Context, denom string) sdk.Int {
return k.bankKeeper.GetSupply(ctx, denom).Amount
}