diff --git a/api/side/lending/query.pulsar.go b/api/side/lending/query.pulsar.go
index 3598c077..f6c46f13 100644
--- a/api/side/lending/query.pulsar.go
+++ b/api/side/lending/query.pulsar.go
@@ -612,8 +612,8 @@ func (x *fastReflection_QueryLiquidationEventResponse) Interface() protoreflect.
 // While iterating, mutating operations may only be performed
 // on the current field descriptor.
 func (x *fastReflection_QueryLiquidationEventResponse) Range(f func(protoreflect.FieldDescriptor, protoreflect.Value) bool) {
-	if x.EventId != "" {
-		value := protoreflect.ValueOfString(x.EventId)
+	if x.EventId != uint64(0) {
+		value := protoreflect.ValueOfUint64(x.EventId)
 		if !f(fd_QueryLiquidationEventResponse_event_id, value) {
 			return
 		}
@@ -652,7 +652,7 @@ func (x *fastReflection_QueryLiquidationEventResponse) Range(f func(protoreflect
 func (x *fastReflection_QueryLiquidationEventResponse) Has(fd protoreflect.FieldDescriptor) bool {
 	switch fd.FullName() {
 	case "side.lending.QueryLiquidationEventResponse.event_id":
-		return x.EventId != ""
+		return x.EventId != uint64(0)
 	case "side.lending.QueryLiquidationEventResponse.oracle_pubkey":
 		return x.OraclePubkey != ""
 	case "side.lending.QueryLiquidationEventResponse.nonce":
@@ -676,7 +676,7 @@ func (x *fastReflection_QueryLiquidationEventResponse) Has(fd protoreflect.Field
 func (x *fastReflection_QueryLiquidationEventResponse) Clear(fd protoreflect.FieldDescriptor) {
 	switch fd.FullName() {
 	case "side.lending.QueryLiquidationEventResponse.event_id":
-		x.EventId = ""
+		x.EventId = uint64(0)
 	case "side.lending.QueryLiquidationEventResponse.oracle_pubkey":
 		x.OraclePubkey = ""
 	case "side.lending.QueryLiquidationEventResponse.nonce":
@@ -701,7 +701,7 @@ func (x *fastReflection_QueryLiquidationEventResponse) Get(descriptor protorefle
 	switch descriptor.FullName() {
 	case "side.lending.QueryLiquidationEventResponse.event_id":
 		value := x.EventId
-		return protoreflect.ValueOfString(value)
+		return protoreflect.ValueOfUint64(value)
 	case "side.lending.QueryLiquidationEventResponse.oracle_pubkey":
 		value := x.OraclePubkey
 		return protoreflect.ValueOfString(value)
@@ -732,7 +732,7 @@ func (x *fastReflection_QueryLiquidationEventResponse) Get(descriptor protorefle
 func (x *fastReflection_QueryLiquidationEventResponse) Set(fd protoreflect.FieldDescriptor, value protoreflect.Value) {
 	switch fd.FullName() {
 	case "side.lending.QueryLiquidationEventResponse.event_id":
-		x.EventId = value.Interface().(string)
+		x.EventId = value.Uint()
 	case "side.lending.QueryLiquidationEventResponse.oracle_pubkey":
 		x.OraclePubkey = value.Interface().(string)
 	case "side.lending.QueryLiquidationEventResponse.nonce":
@@ -781,7 +781,7 @@ func (x *fastReflection_QueryLiquidationEventResponse) Mutable(fd protoreflect.F
 func (x *fastReflection_QueryLiquidationEventResponse) NewField(fd protoreflect.FieldDescriptor) protoreflect.Value {
 	switch fd.FullName() {
 	case "side.lending.QueryLiquidationEventResponse.event_id":
-		return protoreflect.ValueOfString("")
+		return protoreflect.ValueOfUint64(uint64(0))
 	case "side.lending.QueryLiquidationEventResponse.oracle_pubkey":
 		return protoreflect.ValueOfString("")
 	case "side.lending.QueryLiquidationEventResponse.nonce":
@@ -857,9 +857,8 @@ func (x *fastReflection_QueryLiquidationEventResponse) ProtoMethods() *protoifac
 		var n int
 		var l int
 		_ = l
-		l = len(x.EventId)
-		if l > 0 {
-			n += 1 + l + runtime.Sov(uint64(l))
+		if x.EventId != 0 {
+			n += 1 + runtime.Sov(uint64(x.EventId))
 		}
 		l = len(x.OraclePubkey)
 		if l > 0 {
@@ -923,12 +922,10 @@ func (x *fastReflection_QueryLiquidationEventResponse) ProtoMethods() *protoifac
 			i--
 			dAtA[i] = 0x12
 		}
-		if len(x.EventId) > 0 {
-			i -= len(x.EventId)
-			copy(dAtA[i:], x.EventId)
-			i = runtime.EncodeVarint(dAtA, i, uint64(len(x.EventId)))
+		if x.EventId != 0 {
+			i = runtime.EncodeVarint(dAtA, i, uint64(x.EventId))
 			i--
-			dAtA[i] = 0xa
+			dAtA[i] = 0x8
 		}
 		if input.Buf != nil {
 			input.Buf = append(input.Buf, dAtA...)
@@ -980,10 +977,10 @@ func (x *fastReflection_QueryLiquidationEventResponse) ProtoMethods() *protoifac
 			}
 			switch fieldNum {
 			case 1:
-				if wireType != 2 {
+				if wireType != 0 {
 					return protoiface.UnmarshalOutput{NoUnkeyedLiterals: input.NoUnkeyedLiterals, Flags: input.Flags}, fmt.Errorf("proto: wrong wireType = %d for field EventId", wireType)
 				}
-				var stringLen uint64
+				x.EventId = 0
 				for shift := uint(0); ; shift += 7 {
 					if shift >= 64 {
 						return protoiface.UnmarshalOutput{NoUnkeyedLiterals: input.NoUnkeyedLiterals, Flags: input.Flags}, runtime.ErrIntOverflow
@@ -993,24 +990,11 @@ func (x *fastReflection_QueryLiquidationEventResponse) ProtoMethods() *protoifac
 					}
 					b := dAtA[iNdEx]
 					iNdEx++
-					stringLen |= uint64(b&0x7F) << shift
+					x.EventId |= uint64(b&0x7F) << shift
 					if b < 0x80 {
 						break
 					}
 				}
-				intStringLen := int(stringLen)
-				if intStringLen < 0 {
-					return protoiface.UnmarshalOutput{NoUnkeyedLiterals: input.NoUnkeyedLiterals, Flags: input.Flags}, runtime.ErrInvalidLength
-				}
-				postIndex := iNdEx + intStringLen
-				if postIndex < 0 {
-					return protoiface.UnmarshalOutput{NoUnkeyedLiterals: input.NoUnkeyedLiterals, Flags: input.Flags}, runtime.ErrInvalidLength
-				}
-				if postIndex > l {
-					return protoiface.UnmarshalOutput{NoUnkeyedLiterals: input.NoUnkeyedLiterals, Flags: input.Flags}, io.ErrUnexpectedEOF
-				}
-				x.EventId = string(dAtA[iNdEx:postIndex])
-				iNdEx = postIndex
 			case 2:
 				if wireType != 2 {
 					return protoiface.UnmarshalOutput{NoUnkeyedLiterals: input.NoUnkeyedLiterals, Flags: input.Flags}, fmt.Errorf("proto: wrong wireType = %d for field OraclePubkey", wireType)
@@ -4689,7 +4673,7 @@ type QueryLiquidationEventResponse struct {
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	EventId      string `protobuf:"bytes,1,opt,name=event_id,json=eventId,proto3" json:"event_id,omitempty"`
+	EventId      uint64 `protobuf:"varint,1,opt,name=event_id,json=eventId,proto3" json:"event_id,omitempty"`
 	OraclePubkey string `protobuf:"bytes,2,opt,name=oracle_pubkey,json=oraclePubkey,proto3" json:"oracle_pubkey,omitempty"`
 	Nonce        string `protobuf:"bytes,3,opt,name=nonce,proto3" json:"nonce,omitempty"`
 	Price        string `protobuf:"bytes,4,opt,name=price,proto3" json:"price,omitempty"`
@@ -4715,11 +4699,11 @@ func (*QueryLiquidationEventResponse) Descriptor() ([]byte, []int) {
 	return file_side_lending_query_proto_rawDescGZIP(), []int{1}
 }
 
-func (x *QueryLiquidationEventResponse) GetEventId() string {
+func (x *QueryLiquidationEventResponse) GetEventId() uint64 {
 	if x != nil {
 		return x.EventId
 	}
-	return ""
+	return 0
 }
 
 func (x *QueryLiquidationEventResponse) GetOraclePubkey() string {
@@ -5072,7 +5056,7 @@ var file_side_lending_query_proto_rawDesc = []byte{
 	0x72, 0x61, 0x6c, 0x41, 0x63, 0x6d, 0x6f, 0x75, 0x6e, 0x74, 0x22, 0x8b, 0x01, 0x0a, 0x1d, 0x51,
 	0x75, 0x65, 0x72, 0x79, 0x4c, 0x69, 0x71, 0x75, 0x69, 0x64, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x45,
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@@ -5095,79 +5079,79 @@ var file_side_lending_query_proto_rawDesc = []byte{
 	0x64, 0x64, 0x72, 0x65, 0x73, 0x73, 0x52, 0x65, 0x73, 0x70, 0x6f, 0x6e, 0x73, 0x65, 0x12, 0x18,
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 }
 
 var (
diff --git a/proto/side/lending/query.proto b/proto/side/lending/query.proto
index 28fcf776..b4688fc0 100644
--- a/proto/side/lending/query.proto
+++ b/proto/side/lending/query.proto
@@ -40,7 +40,7 @@ message QueryLiquidationEventRequest{
 }
 
 message QueryLiquidationEventResponse {
-    string event_id = 1;
+    uint64 event_id = 1;
     string oracle_pubkey = 2;
     string nonce = 3;
     string price = 4;
@@ -63,7 +63,7 @@ message QueryParamsRequest {
 
 // QueryParamsResponse is response type for the Query/Params RPC method.
 message QueryParamsResponse {
-    Params params = 1;
+    Params params = 1 [(gogoproto.nullable) = false];
 }
 
 // QueryLoanCETsRequest is request type for the Query/LoanCETs RPC method.
diff --git a/x/lending/keeper/queries.go b/x/lending/keeper/queries.go
index a11bdbf7..57e6412a 100644
--- a/x/lending/keeper/queries.go
+++ b/x/lending/keeper/queries.go
@@ -3,32 +3,85 @@ package keeper
 import (
 	"context"
 
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/status"
+
+	sdk "github.com/cosmos/cosmos-sdk/types"
+
 	"github.com/sideprotocol/side/x/lending/types"
 )
 
 var _ types.QueryServer = Keeper{}
 
 // CollateralAddress implements types.QueryServer.
-func (k Keeper) CollateralAddress(context.Context, *types.QueryCollateralAddressRequest) (*types.QueryCollateralAddressResponse, error) {
-	panic("unimplemented")
+func (k Keeper) CollateralAddress(goCtx context.Context, req *types.QueryCollateralAddressRequest) (*types.QueryCollateralAddressResponse, error) {
+	if req == nil {
+		return nil, status.Error(codes.InvalidArgument, "invalid request")
+	}
+
+	// TODO: query the DCA public key
+	dcaPubKey := ""
+
+	collateralAddr, err := types.CreateVaultAddress(req.BorrowerPubkey, dcaPubKey, req.HashOfLoanSecret, int64(req.MaturityTime), int64(req.FinalTimeout))
+	if err != nil {
+		return nil, err
+	}
+
+	return &types.QueryCollateralAddressResponse{Address: collateralAddr}, nil
 }
 
 // LiquidationEvent implements types.QueryServer.
-func (k Keeper) LiquidationEvent(context.Context, *types.QueryLiquidationEventRequest) (*types.QueryLiquidationEventResponse, error) {
-	panic("unimplemented")
+func (k Keeper) LiquidationEvent(goCtx context.Context, req *types.QueryLiquidationEventRequest) (*types.QueryLiquidationEventResponse, error) {
+	if req == nil {
+		return nil, status.Error(codes.InvalidArgument, "invalid request")
+	}
+
+	ctx := sdk.UnwrapSDKContext(goCtx)
+
+	liquidationPrice := types.GetLiquidationPrice(req.CollateralAcmount.Amount, req.BorrowAmount.Amount, k.GetParams(ctx).LiquidationThresholdPercent)
+
+	event := k.dlcKeeper.GetEventByPrice(ctx, liquidationPrice)
+	if event == nil {
+		return nil, nil
+	}
+
+	return &types.QueryLiquidationEventResponse{
+		EventId:      event.Id,
+		OraclePubkey: event.Pubkey,
+		Nonce:        event.Nonce,
+		Price:        event.TriggerPrice.String(),
+	}, nil
 }
 
 // LoanCETs implements types.QueryServer.
-func (k Keeper) LoanCETs(context.Context, *types.QueryLoanCETsRequest) (*types.QueryLoanCETsResponse, error) {
-	panic("unimplemented")
-}
+func (k Keeper) LoanCETs(goCtx context.Context, req *types.QueryLoanCETsRequest) (*types.QueryLoanCETsResponse, error) {
+	if req == nil {
+		return nil, status.Error(codes.InvalidArgument, "invalid request")
+	}
 
-// Params implements types.QueryServer.
-func (k Keeper) Params(context.Context, *types.QueryParamsRequest) (*types.QueryParamsResponse, error) {
-	panic("unimplemented")
+	ctx := sdk.UnwrapSDKContext(goCtx)
+
+	return &types.QueryLoanCETsResponse{CETs: k.GetCETs(ctx, req.LoanId)}, nil
 }
 
 // UnsignedPaymentTx implements types.QueryServer.
-func (k Keeper) UnsignedPaymentTx(context.Context, *types.QueryRepaymentTxRequest) (*types.QueryRepaymentTxResponse, error) {
-	panic("unimplemented")
+func (k Keeper) UnsignedPaymentTx(goCtx context.Context, req *types.QueryRepaymentTxRequest) (*types.QueryRepaymentTxResponse, error) {
+	if req == nil {
+		return nil, status.Error(codes.InvalidArgument, "invalid request")
+	}
+
+	ctx := sdk.UnwrapSDKContext(goCtx)
+
+	return &types.QueryRepaymentTxResponse{ClaimTx: k.GetRepayment(ctx, req.LoanId).Tx}, nil
+}
+
+// Params implements types.QueryServer.
+func (k Keeper) Params(goCtx context.Context, req *types.QueryParamsRequest) (*types.QueryParamsResponse, error) {
+	if req == nil {
+		return nil, status.Error(codes.InvalidArgument, "invalid request")
+	}
+
+	ctx := sdk.UnwrapSDKContext(goCtx)
+
+	return &types.QueryParamsResponse{Params: k.GetParams(ctx)}, nil
 }
diff --git a/x/lending/types/expected_keepers.go b/x/lending/types/expected_keepers.go
index 99057b65..fb09efb6 100644
--- a/x/lending/types/expected_keepers.go
+++ b/x/lending/types/expected_keepers.go
@@ -3,8 +3,9 @@ package types
 import (
 	"context"
 
-	sdkmath "cosmossdk.io/math"
 	"github.com/btcsuite/btcd/btcutil"
+
+	sdkmath "cosmossdk.io/math"
 	sdk "github.com/cosmos/cosmos-sdk/types"
 	"github.com/cosmos/cosmos-sdk/x/auth/types"
 	banktype "github.com/cosmos/cosmos-sdk/x/bank/types"
@@ -52,7 +53,9 @@ type AuctionKeeper interface {
 // DLCKeeper defines the expected DLC keeper interface
 type DLCKeeper interface {
 	HasEvent(ctx sdk.Context, id uint64) bool
+
 	GetEvent(ctx sdk.Context, id uint64) *dlctypes.DLCPriceEvent
+	GetEventByPrice(ctx sdk.Context, price sdkmath.Int) *dlctypes.DLCPriceEvent
 	GetAttestationByEvent(ctx sdk.Context, eventId uint64) *dlctypes.DLCAttestation
 
 	TriggerEvent(ctx sdk.Context, id uint64)
diff --git a/x/lending/types/query.pb.go b/x/lending/types/query.pb.go
index 6234e5d6..e84213eb 100644
--- a/x/lending/types/query.pb.go
+++ b/x/lending/types/query.pb.go
@@ -84,7 +84,7 @@ func (m *QueryLiquidationEventRequest) GetCollateralAcmount() *types.Coin {
 }
 
 type QueryLiquidationEventResponse struct {
-	EventId      string `protobuf:"bytes,1,opt,name=event_id,json=eventId,proto3" json:"event_id,omitempty"`
+	EventId      uint64 `protobuf:"varint,1,opt,name=event_id,json=eventId,proto3" json:"event_id,omitempty"`
 	OraclePubkey string `protobuf:"bytes,2,opt,name=oracle_pubkey,json=oraclePubkey,proto3" json:"oracle_pubkey,omitempty"`
 	Nonce        string `protobuf:"bytes,3,opt,name=nonce,proto3" json:"nonce,omitempty"`
 	Price        string `protobuf:"bytes,4,opt,name=price,proto3" json:"price,omitempty"`
@@ -123,11 +123,11 @@ func (m *QueryLiquidationEventResponse) XXX_DiscardUnknown() {
 
 var xxx_messageInfo_QueryLiquidationEventResponse proto.InternalMessageInfo
 
-func (m *QueryLiquidationEventResponse) GetEventId() string {
+func (m *QueryLiquidationEventResponse) GetEventId() uint64 {
 	if m != nil {
 		return m.EventId
 	}
-	return ""
+	return 0
 }
 
 func (m *QueryLiquidationEventResponse) GetOraclePubkey() string {
@@ -302,7 +302,7 @@ var xxx_messageInfo_QueryParamsRequest proto.InternalMessageInfo
 
 // QueryParamsResponse is response type for the Query/Params RPC method.
 type QueryParamsResponse struct {
-	Params *Params `protobuf:"bytes,1,opt,name=params,proto3" json:"params,omitempty"`
+	Params Params `protobuf:"bytes,1,opt,name=params,proto3" json:"params"`
 }
 
 func (m *QueryParamsResponse) Reset()         { *m = QueryParamsResponse{} }
@@ -338,11 +338,11 @@ func (m *QueryParamsResponse) XXX_DiscardUnknown() {
 
 var xxx_messageInfo_QueryParamsResponse proto.InternalMessageInfo
 
-func (m *QueryParamsResponse) GetParams() *Params {
+func (m *QueryParamsResponse) GetParams() Params {
 	if m != nil {
 		return m.Params
 	}
-	return nil
+	return Params{}
 }
 
 // QueryLoanCETsRequest is request type for the Query/LoanCETs RPC method.
@@ -539,58 +539,58 @@ func init() {
 func init() { proto.RegisterFile("side/lending/query.proto", fileDescriptor_27db04072aa81358) }
 
 var fileDescriptor_27db04072aa81358 = []byte{
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 }
 
 // Reference imports to suppress errors if they are not otherwise used.
@@ -908,12 +908,10 @@ func (m *QueryLiquidationEventResponse) MarshalToSizedBuffer(dAtA []byte) (int,
 		i--
 		dAtA[i] = 0x12
 	}
-	if len(m.EventId) > 0 {
-		i -= len(m.EventId)
-		copy(dAtA[i:], m.EventId)
-		i = encodeVarintQuery(dAtA, i, uint64(len(m.EventId)))
+	if m.EventId != 0 {
+		i = encodeVarintQuery(dAtA, i, uint64(m.EventId))
 		i--
-		dAtA[i] = 0xa
+		dAtA[i] = 0x8
 	}
 	return len(dAtA) - i, nil
 }
@@ -1038,18 +1036,16 @@ func (m *QueryParamsResponse) MarshalToSizedBuffer(dAtA []byte) (int, error) {
 	_ = i
 	var l int
 	_ = l
-	if m.Params != nil {
-		{
-			size, err := m.Params.MarshalToSizedBuffer(dAtA[:i])
-			if err != nil {
-				return 0, err
-			}
-			i -= size
-			i = encodeVarintQuery(dAtA, i, uint64(size))
+	{
+		size, err := m.Params.MarshalToSizedBuffer(dAtA[:i])
+		if err != nil {
+			return 0, err
 		}
-		i--
-		dAtA[i] = 0xa
+		i -= size
+		i = encodeVarintQuery(dAtA, i, uint64(size))
 	}
+	i--
+	dAtA[i] = 0xa
 	return len(dAtA) - i, nil
 }
 
@@ -1212,9 +1208,8 @@ func (m *QueryLiquidationEventResponse) Size() (n int) {
 	}
 	var l int
 	_ = l
-	l = len(m.EventId)
-	if l > 0 {
-		n += 1 + l + sovQuery(uint64(l))
+	if m.EventId != 0 {
+		n += 1 + sovQuery(uint64(m.EventId))
 	}
 	l = len(m.OraclePubkey)
 	if l > 0 {
@@ -1282,10 +1277,8 @@ func (m *QueryParamsResponse) Size() (n int) {
 	}
 	var l int
 	_ = l
-	if m.Params != nil {
-		l = m.Params.Size()
-		n += 1 + l + sovQuery(uint64(l))
-	}
+	l = m.Params.Size()
+	n += 1 + l + sovQuery(uint64(l))
 	return n
 }
 
@@ -1499,10 +1492,10 @@ func (m *QueryLiquidationEventResponse) Unmarshal(dAtA []byte) error {
 		}
 		switch fieldNum {
 		case 1:
-			if wireType != 2 {
+			if wireType != 0 {
 				return fmt.Errorf("proto: wrong wireType = %d for field EventId", wireType)
 			}
-			var stringLen uint64
+			m.EventId = 0
 			for shift := uint(0); ; shift += 7 {
 				if shift >= 64 {
 					return ErrIntOverflowQuery
@@ -1512,24 +1505,11 @@ func (m *QueryLiquidationEventResponse) Unmarshal(dAtA []byte) error {
 				}
 				b := dAtA[iNdEx]
 				iNdEx++
-				stringLen |= uint64(b&0x7F) << shift
+				m.EventId |= uint64(b&0x7F) << shift
 				if b < 0x80 {
 					break
 				}
 			}
-			intStringLen := int(stringLen)
-			if intStringLen < 0 {
-				return ErrInvalidLengthQuery
-			}
-			postIndex := iNdEx + intStringLen
-			if postIndex < 0 {
-				return ErrInvalidLengthQuery
-			}
-			if postIndex > l {
-				return io.ErrUnexpectedEOF
-			}
-			m.EventId = string(dAtA[iNdEx:postIndex])
-			iNdEx = postIndex
 		case 2:
 			if wireType != 2 {
 				return fmt.Errorf("proto: wrong wireType = %d for field OraclePubkey", wireType)
@@ -1989,9 +1969,6 @@ func (m *QueryParamsResponse) Unmarshal(dAtA []byte) error {
 			if postIndex > l {
 				return io.ErrUnexpectedEOF
 			}
-			if m.Params == nil {
-				m.Params = &Params{}
-			}
 			if err := m.Params.Unmarshal(dAtA[iNdEx:postIndex]); err != nil {
 				return err
 			}