Add new distribution query types

types/queries.go

@@ -364,7 +364,14 @@ type Delegation struct {
 }
 
 type DistributionQuery struct {
+	// See <https://github.com/cosmos/cosmos-sdk/blob/c74e2887b0b73e81d48c2f33e6b1020090089ee0/proto/cosmos/distribution/v1beta1/query.proto#L222-L230>
 	DelegatorWithdrawAddress *DelegatorWithdrawAddressQuery `json:"delegator_withdraw_address,omitempty"`
+	// See <https://github.com/cosmos/cosmos-sdk/blob/c74e2887b0b73e81d48c2f33e6b1020090089ee0/proto/cosmos/distribution/v1beta1/query.proto#L157-L167>
+	DelegationRewards *DelegationRewardsQuery `json:"delegation_rewards,omitempty"`
+	// See <https://github.com/cosmos/cosmos-sdk/blob/c74e2887b0b73e81d48c2f33e6b1020090089ee0/proto/cosmos/distribution/v1beta1/query.proto#L180-L187>
+	DelegationTotalRewards *DelegationTotalRewardsQuery `json:"delegation_total_rewards,omitempty"`
+	// See <https://github.com/cosmos/cosmos-sdk/blob/b0acf60e6c39f7ab023841841fc0b751a12c13ff/proto/cosmos/distribution/v1beta1/query.proto#L202-L210>
+	DelegatorValidators *DelegatorValidatorsQuery `json:"delegator_validators,omitempty"`
 }
 
 type DelegatorWithdrawAddressQuery struct {
@@ -375,6 +382,40 @@ type DelegatorWithdrawAddressResponse struct {
 	WithdrawAddress string `json:"withdraw_address"`
 }
 
+type DelegationRewardsQuery struct {
+	DelegatorAddress string `json:"delegator_address"`
+	ValidatorAddress string `json:"validator_address"`
+}
+
+// See <https://github.com/cosmos/cosmos-sdk/blob/c74e2887b0b73e81d48c2f33e6b1020090089ee0/proto/cosmos/distribution/v1beta1/query.proto#L169-L178>
+type DelegationRewardsResponse struct {
+	Rewards []DecCoin `json:"rewards"`
+}
+
+type DelegationTotalRewardsQuery struct {
+	DelegatorAddress string `json:"delegator_address"`
+}
+
+// See <https://github.com/cosmos/cosmos-sdk/blob/c74e2887b0b73e81d48c2f33e6b1020090089ee0/proto/cosmos/distribution/v1beta1/query.proto#L189-L200>
+type DelegationTotalRewardsResponse struct {
+	Rewards []DelegatorReward `json:"rewards"`
+	Total   []DecCoin         `json:"total"`
+}
+
+type DelegatorReward struct {
+	Reward           []DecCoin `json:"reward"`
+	ValidatorAddress string    `json:"validator_address"`
+}
+
+type DelegatorValidatorsQuery struct {
+	DelegatorAddress string `json:"delegator_address"`
+}
+
+// See <https://github.com/cosmos/cosmos-sdk/blob/b0acf60e6c39f7ab023841841fc0b751a12c13ff/proto/cosmos/distribution/v1beta1/query.proto#L212-L220>
+type DelegatorValidatorsResponse struct {
+	Validators []string `json:"validators"`
+}
+
 // DelegationResponse is the expected response to DelegationsQuery
 type DelegationResponse struct {
 	Delegation *FullDelegation `json:"delegation,omitempty"`

types/types.go

@@ -94,6 +94,23 @@ type DenomUnit struct {
 	Aliases []string `json:"aliases"`
 }
 
+// A coin type with decimal amount.
+// Modeled after the Cosmos SDK's [DecCoin] type.
+// However, in contrast to the Cosmos SDK the `amount` string MUST always have a dot at JSON level,
+// see <https://github.com/cosmos/cosmos-sdk/issues/10863>.
+// Also if Cosmos SDK choses to migrate away from fixed point decimals
+// (as shown [here](https://github.com/cosmos/cosmos-sdk/blob/v0.47.4/x/group/internal/math/dec.go#L13-L21) and discussed [here](https://github.com/cosmos/cosmos-sdk/issues/11783)),
+// wasmd needs to truncate the decimal places to 18.
+//
+// [DecCoin]: (https://github.com/cosmos/cosmos-sdk/blob/v0.47.4/proto/cosmos/base/v1beta1/coin.proto#L28-L38)
+type DecCoin struct {
+	// An amount in the base denom of the distributed token.
+	//
+	// Some chains have choosen atto (10^-18) for their token's base denomination. If we used `Decimal` here, we could only store 340282366920938463463.374607431768211455atoken which is 340.28 TOKEN.
+	Amount string `json:"amount"`
+	Denom  string `json:"denom"`
+}
+
 // Simplified version of the cosmos-sdk PageRequest type
 type PageRequest struct {
 	// Key is a value returned in PageResponse.next_key to begin