add galactic punks staking contract

protocols/galacticpunks/staking.go

@@ -0,0 +1,32 @@
+package galacticpunks
+
+import (
+	"github.com/galacticship/terra"
+	"github.com/galacticship/terra/cosmos"
+	"github.com/pkg/errors"
+)
+
+type Staking struct {
+	*terra.Contract
+}
+
+func NewStaking(querier *terra.Querier) (*Staking, error) {
+	contract, err := terra.NewContract(querier, "terra10t4pgfs6s3qeykqgfq9r74s89jmu7zx5gfkga5")
+	if err != nil {
+		return nil, errors.Wrap(err, "init contract object")
+	}
+
+	return &Staking{
+		Contract: contract,
+	}, nil
+}
+
+func (s *Staking) NewWithdrawRewardsMessage(sender cosmos.AccAddress, tokenId string) (cosmos.Msg, error) {
+	var q struct {
+		WithdrawRewards struct {
+			TokenId string `json:"token_id"`
+		} `json:"withdraw_rewards"`
+	}
+	q.WithdrawRewards.TokenId = tokenId
+	return s.NewMsgExecuteContract(sender, q)
+}