[p] Add GetContract API

dfssc/api/client.pb.go

@@ -83,6 +83,10 @@ func init() {
 var _ context.Context
 var _ grpc.ClientConn
 
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the grpc package it is being compiled against.
+const _ = grpc.SupportPackageIsVersion1
+
 // Client API for Client service
 
 type ClientClient interface {

dfssd/api/demonstrator.pb.go

@@ -62,6 +62,10 @@ func init() {
 var _ context.Context
 var _ grpc.ClientConn
 
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the grpc package it is being compiled against.
+const _ = grpc.SupportPackageIsVersion1
+
 // Client API for Demonstrator service
 
 type DemonstratorClient interface {

dfssp/api/platform.pb.go

@@ -15,6 +15,8 @@ It has these top-level messages:
 	RegisteredUser
 	Empty
 	PostContractRequest
+	GetContractRequest
+	Contract
 	JoinSignatureRequest
 	UserConnected
 	User
@@ -146,6 +148,35 @@ func (m *PostContractRequest) String() string            { return proto.CompactT
 func (*PostContractRequest) ProtoMessage()               {}
 func (*PostContractRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{5} }
 
+// GetContractRequest message contains the uuid of the asked contract
+type GetContractRequest struct {
+	Uuid string `protobuf:"bytes,1,opt,name=uuid" json:"uuid,omitempty"`
+}
+
+func (m *GetContractRequest) Reset()                    { *m = GetContractRequest{} }
+func (m *GetContractRequest) String() string            { return proto.CompactTextString(m) }
+func (*GetContractRequest) ProtoMessage()               {}
+func (*GetContractRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{6} }
+
+// Contract is the return value when a contract is fetched from the platform.
+// The contract is in json format to avoid duplicating structures.
+type Contract struct {
+	ErrorCode *ErrorCode `protobuf:"bytes,1,opt,name=errorCode" json:"errorCode,omitempty"`
+	Json      []byte     `protobuf:"bytes,2,opt,name=json,proto3" json:"json,omitempty"`
+}
+
+func (m *Contract) Reset()                    { *m = Contract{} }
+func (m *Contract) String() string            { return proto.CompactTextString(m) }
+func (*Contract) ProtoMessage()               {}
+func (*Contract) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{7} }
+
+func (m *Contract) GetErrorCode() *ErrorCode {
+	if m != nil {
+		return m.ErrorCode
+	}
+	return nil
+}
+
 // JoinSignatureRequest message contains the contract to join unique identifier
 // and the port the client will be listening at
 type JoinSignatureRequest struct {
@@ -156,7 +187,7 @@ type JoinSignatureRequest struct {
 func (m *JoinSignatureRequest) Reset()                    { *m = JoinSignatureRequest{} }
 func (m *JoinSignatureRequest) String() string            { return proto.CompactTextString(m) }
 func (*JoinSignatureRequest) ProtoMessage()               {}
-func (*JoinSignatureRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{6} }
+func (*JoinSignatureRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{8} }
 
 // UserConnected is emitted by the platform to the client to announce a new client connection
 type UserConnected struct {
@@ -168,7 +199,7 @@ type UserConnected struct {
 func (m *UserConnected) Reset()                    { *m = UserConnected{} }
 func (m *UserConnected) String() string            { return proto.CompactTextString(m) }
 func (*UserConnected) ProtoMessage()               {}
-func (*UserConnected) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{7} }
+func (*UserConnected) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{9} }
 
 func (m *UserConnected) GetErrorCode() *ErrorCode {
 	if m != nil {
@@ -194,7 +225,7 @@ type User struct {
 func (m *User) Reset()                    { *m = User{} }
 func (m *User) String() string            { return proto.CompactTextString(m) }
 func (*User) ProtoMessage()               {}
-func (*User) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{8} }
+func (*User) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{10} }
 
 // ReadySignRequest contains the contract unique identitier that is ready to be signed
 type ReadySignRequest struct {
@@ -204,7 +235,7 @@ type ReadySignRequest struct {
 func (m *ReadySignRequest) Reset()                    { *m = ReadySignRequest{} }
 func (m *ReadySignRequest) String() string            { return proto.CompactTextString(m) }
 func (*ReadySignRequest) ProtoMessage()               {}
-func (*ReadySignRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{9} }
+func (*ReadySignRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{11} }
 
 // LaunchSignature is emitted by the platform when every signers are ready
 type LaunchSignature struct {
@@ -217,7 +248,7 @@ type LaunchSignature struct {
 func (m *LaunchSignature) Reset()                    { *m = LaunchSignature{} }
 func (m *LaunchSignature) String() string            { return proto.CompactTextString(m) }
 func (*LaunchSignature) ProtoMessage()               {}
-func (*LaunchSignature) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{10} }
+func (*LaunchSignature) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{12} }
 
 func (m *LaunchSignature) GetErrorCode() *ErrorCode {
 	if m != nil {
@@ -233,6 +264,8 @@ func init() {
 	proto.RegisterType((*RegisteredUser)(nil), "api.RegisteredUser")
 	proto.RegisterType((*Empty)(nil), "api.Empty")
 	proto.RegisterType((*PostContractRequest)(nil), "api.PostContractRequest")
+	proto.RegisterType((*GetContractRequest)(nil), "api.GetContractRequest")
+	proto.RegisterType((*Contract)(nil), "api.Contract")
 	proto.RegisterType((*JoinSignatureRequest)(nil), "api.JoinSignatureRequest")
 	proto.RegisterType((*UserConnected)(nil), "api.UserConnected")
 	proto.RegisterType((*User)(nil), "api.User")
@@ -245,6 +278,10 @@ func init() {
 var _ context.Context
 var _ grpc.ClientConn
 
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the grpc package it is being compiled against.
+const _ = grpc.SupportPackageIsVersion1
+
 // Client API for Platform service
 
 type PlatformClient interface {
@@ -252,6 +289,7 @@ type PlatformClient interface {
 	Auth(ctx context.Context, in *AuthRequest, opts ...grpc.CallOption) (*RegisteredUser, error)
 	Unregister(ctx context.Context, in *Empty, opts ...grpc.CallOption) (*ErrorCode, error)
 	PostContract(ctx context.Context, in *PostContractRequest, opts ...grpc.CallOption) (*ErrorCode, error)
+	GetContract(ctx context.Context, in *GetContractRequest, opts ...grpc.CallOption) (*Contract, error)
 	JoinSignature(ctx context.Context, in *JoinSignatureRequest, opts ...grpc.CallOption) (Platform_JoinSignatureClient, error)
 	ReadySign(ctx context.Context, in *ReadySignRequest, opts ...grpc.CallOption) (*LaunchSignature, error)
 }
@@ -300,6 +338,15 @@ func (c *platformClient) PostContract(ctx context.Context, in *PostContractReque
 	return out, nil
 }
 
+func (c *platformClient) GetContract(ctx context.Context, in *GetContractRequest, opts ...grpc.CallOption) (*Contract, error) {
+	out := new(Contract)
+	err := grpc.Invoke(ctx, "/api.Platform/GetContract", in, out, c.cc, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
 func (c *platformClient) JoinSignature(ctx context.Context, in *JoinSignatureRequest, opts ...grpc.CallOption) (Platform_JoinSignatureClient, error) {
 	stream, err := grpc.NewClientStream(ctx, &_Platform_serviceDesc.Streams[0], c.cc, "/api.Platform/JoinSignature", opts...)
 	if err != nil {
@@ -348,6 +395,7 @@ type PlatformServer interface {
 	Auth(context.Context, *AuthRequest) (*RegisteredUser, error)
 	Unregister(context.Context, *Empty) (*ErrorCode, error)
 	PostContract(context.Context, *PostContractRequest) (*ErrorCode, error)
+	GetContract(context.Context, *GetContractRequest) (*Contract, error)
 	JoinSignature(*JoinSignatureRequest, Platform_JoinSignatureServer) error
 	ReadySign(context.Context, *ReadySignRequest) (*LaunchSignature, error)
 }
@@ -404,6 +452,18 @@ func _Platform_PostContract_Handler(srv interface{}, ctx context.Context, dec fu
 	return out, nil
 }
 
+func _Platform_GetContract_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error) (interface{}, error) {
+	in := new(GetContractRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	out, err := srv.(PlatformServer).GetContract(ctx, in)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
 func _Platform_JoinSignature_Handler(srv interface{}, stream grpc.ServerStream) error {
 	m := new(JoinSignatureRequest)
 	if err := stream.RecvMsg(m); err != nil {
@@ -457,6 +517,10 @@ var _Platform_serviceDesc = grpc.ServiceDesc{
 			MethodName: "PostContract",
 			Handler:    _Platform_PostContract_Handler,
 		},
+		{
+			MethodName: "GetContract",
+			Handler:    _Platform_GetContract_Handler,
+		},
 		{
 			MethodName: "ReadySign",
 			Handler:    _Platform_ReadySign_Handler,
@@ -472,45 +536,48 @@ var _Platform_serviceDesc = grpc.ServiceDesc{
 }
 
 var fileDescriptor0 = []byte{
-	// 636 bytes of a gzipped FileDescriptorProto
-	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x09, 0x6e, 0x88, 0x02, 0xff, 0x94, 0x54, 0x6d, 0x6b, 0x13, 0x41,
-	0x10, 0xce, 0x25, 0xd7, 0x97, 0x4c, 0x9b, 0xf4, 0xd8, 0x54, 0x89, 0x81, 0x4a, 0x59, 0x04, 0x45,
-	0x24, 0x29, 0x11, 0x04, 0xfd, 0x76, 0x8d, 0xa1, 0xad, 0x48, 0x28, 0x9b, 0x46, 0xc1, 0x6f, 0xe7,
-	0xdd, 0xb6, 0x39, 0x9a, 0x7b, 0x71, 0x77, 0x0f, 0xe9, 0x37, 0xff, 0x87, 0xe0, 0xdf, 0xf2, 0xe7,
-	0xe8, 0xee, 0xde, 0xed, 0xf5, 0x2e, 0x06, 0xa1, 0xfd, 0x70, 0xdd, 0x99, 0x9d, 0x7d, 0x66, 0x9e,
-	0x67, 0x66, 0x02, 0x47, 0xc1, 0x35, 0xe7, 0x23, 0xf5, 0x49, 0x47, 0x5e, 0x1a, 0x8e, 0xd2, 0x95,
-	0x27, 0xae, 0x13, 0x16, 0x0d, 0x53, 0x96, 0x88, 0x04, 0xb5, 0xa4, 0x0f, 0xbb, 0x70, 0x40, 0xe8,
-	0x4d, 0xc8, 0x05, 0x65, 0x84, 0x7e, 0xcb, 0x28, 0x17, 0xe8, 0x10, 0xb6, 0x68, 0xe4, 0x85, 0xab,
-	0xbe, 0x75, 0x6c, 0xbd, 0x68, 0x93, 0xdc, 0x40, 0x7d, 0xd8, 0x61, 0x79, 0x40, 0xbf, 0xa9, 0xfd,
-	0xc6, 0xc4, 0xbf, 0x2c, 0x68, 0x4f, 0x19, 0x4b, 0xd8, 0x24, 0x09, 0x28, 0x7a, 0x0e, 0xb6, 0x2f,
-	0xff, 0xeb, 0xc7, 0xdd, 0x71, 0x6f, 0x28, 0x93, 0x0c, 0xcb, 0xdb, 0xa1, 0xfa, 0x10, 0x1d, 0xa0,
-	0x00, 0x23, 0xca, 0xb9, 0x77, 0x43, 0x0d, 0x60, 0x61, 0xe2, 0x19, 0xd8, 0x1a, 0x6a, 0x0f, 0x76,
-	0xe6, 0x8b, 0xc9, 0x64, 0x3a, 0x9f, 0x3b, 0x0d, 0x04, 0xb0, 0x7d, 0x31, 0xfb, 0xe4, 0x92, 0x33,
-	0xc7, 0x52, 0x17, 0xa7, 0xee, 0x7b, 0x77, 0x71, 0x75, 0xee, 0x34, 0x95, 0xf1, 0xd9, 0x25, 0xb3,
-	0x8b, 0xd9, 0x99, 0xd3, 0x42, 0x3d, 0x15, 0x75, 0x35, 0x25, 0xc4, 0xf9, 0x63, 0xfe, 0x2c, 0xfc,
-	0x16, 0xf6, 0xdc, 0x4c, 0x2c, 0xff, 0xcf, 0x4f, 0x7a, 0x45, 0x72, 0x4b, 0xe3, 0xa2, 0x98, 0xdc,
-	0xc0, 0x27, 0xd0, 0x35, 0xf2, 0xd0, 0x60, 0xc1, 0x29, 0x43, 0x4f, 0x01, 0xfc, 0x55, 0x48, 0x63,
-	0x31, 0xa1, 0x4c, 0x14, 0x10, 0x15, 0x0f, 0xde, 0x81, 0xad, 0x69, 0x94, 0x8a, 0x3b, 0xfc, 0x1d,
-	0x7a, 0x97, 0x09, 0x17, 0x93, 0x24, 0x16, 0xcc, 0xf3, 0x85, 0xc9, 0x8e, 0xc0, 0x5e, 0x7a, 0x7c,
-	0xa9, 0x5f, 0xee, 0x13, 0x7d, 0x46, 0x03, 0xd8, 0xbd, 0x0e, 0x57, 0x34, 0xf6, 0x22, 0xa3, 0x45,
-	0x69, 0xa3, 0xc7, 0xb0, 0xcd, 0xc3, 0x9b, 0x98, 0xb2, 0x7e, 0xeb, 0xb8, 0x25, 0x6f, 0x0a, 0x4b,
-	0xc9, 0xe7, 0x27, 0x51, 0x24, 0xd3, 0xf6, 0xed, 0x5c, 0xbe, 0xc2, 0x94, 0xf2, 0x1d, 0x7e, 0x48,
-	0xc2, 0x78, 0x2e, 0xe3, 0x3c, 0x91, 0x31, 0x6a, 0x32, 0x63, 0xd8, 0xf7, 0x8b, 0x62, 0x16, 0x59,
-	0x18, 0x14, 0xb5, 0xd7, 0x7c, 0xaa, 0xba, 0x34, 0x61, 0x79, 0x8b, 0x3b, 0x44, 0x9f, 0xf1, 0x0f,
-	0x0b, 0x3a, 0x8a, 0xba, 0x64, 0x12, 0x53, 0x5f, 0xd0, 0x00, 0xbd, 0x82, 0x36, 0x35, 0x2d, 0xd5,
-	0x30, 0x7b, 0xe3, 0x6e, 0xbd, 0xd1, 0xe4, 0x3e, 0xe0, 0x9f, 0xbc, 0xcd, 0x0d, 0x79, 0x8f, 0xc0,
-	0xce, 0xb8, 0xe6, 0xa8, 0xc0, 0xda, 0x1a, 0x4c, 0xe5, 0x24, 0xda, 0x8d, 0xbf, 0x80, 0xad, 0xc5,
-	0x97, 0xa4, 0x6f, 0xe9, 0xdd, 0xf9, 0xbd, 0x7e, 0xc6, 0xbc, 0x6f, 0x6a, 0xb3, 0xda, 0xd4, 0x2e,
-	0x34, 0xc3, 0x54, 0x83, 0xb6, 0x89, 0x3c, 0x95, 0xf4, 0xec, 0x0a, 0xbd, 0x37, 0xe0, 0x10, 0xea,
-	0x05, 0x77, 0x4a, 0xaf, 0x07, 0x48, 0x85, 0x7f, 0x5a, 0x70, 0xf0, 0xd1, 0xcb, 0x62, 0x7f, 0x59,
-	0x2a, 0xfd, 0x40, 0x61, 0x9e, 0x41, 0x87, 0x9b, 0xa7, 0x15, 0x65, 0xea, 0xce, 0x2a, 0x67, 0x35,
-	0x01, 0x15, 0xce, 0x72, 0x6c, 0xb8, 0x2a, 0x38, 0xf6, 0xa9, 0x64, 0xd4, 0x92, 0x8c, 0x4a, 0x7b,
-	0xfc, 0xbb, 0x09, 0xbb, 0x97, 0xc5, 0xbe, 0xa3, 0x31, 0xec, 0x9a, 0x29, 0x46, 0x87, 0xba, 0x9e,
-	0xb5, 0x9d, 0x1f, 0xac, 0x55, 0x89, 0x1b, 0x68, 0x04, 0xb6, 0x5a, 0x1a, 0xe4, 0xe8, 0x9b, 0xca,
-	0xfe, 0x0c, 0x7a, 0x35, 0x84, 0x7c, 0x2d, 0xe4, 0x83, 0x97, 0x00, 0x8b, 0x98, 0x99, 0x34, 0x90,
-	0x03, 0xaa, 0x4d, 0xd8, 0x00, 0xfe, 0x0e, 0xf6, 0xab, 0xbb, 0x81, 0xfa, 0x3a, 0x62, 0xc3, 0xba,
-	0x6c, 0x78, 0x7b, 0x0a, 0x9d, 0xda, 0x78, 0xa3, 0x27, 0x3a, 0x64, 0xd3, 0xc8, 0x0f, 0x50, 0x39,
-	0x48, 0xe5, 0xf0, 0xe2, 0xc6, 0x89, 0x25, 0xf3, 0xb7, 0xcb, 0x9e, 0xa3, 0x47, 0x05, 0x9f, 0xfa,
-	0x0c, 0x0c, 0x72, 0xa1, 0xd6, 0x3a, 0x8c, 0x1b, 0x5f, 0xb7, 0xf5, 0xaf, 0xe7, 0xeb, 0xbf, 0x01,
-	0x00, 0x00, 0xff, 0xff, 0x3f, 0xa2, 0x07, 0x22, 0x5e, 0x05, 0x00, 0x00,
+	// 684 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x09, 0x6e, 0x88, 0x02, 0xff, 0x94, 0x54, 0xdf, 0x6f, 0x12, 0x4f,
+	0x10, 0xe7, 0xe0, 0xda, 0xc2, 0x50, 0xe8, 0x65, 0xe9, 0xf7, 0x2b, 0x92, 0xd4, 0x34, 0x1b, 0x13,
+	0x1b, 0x63, 0xa0, 0xc1, 0x44, 0xa3, 0x6f, 0x14, 0x49, 0x5b, 0xd3, 0x90, 0x66, 0x29, 0x9a, 0xf8,
+	0x76, 0x1e, 0xdb, 0x72, 0x96, 0xfb, 0xe1, 0xee, 0x12, 0xd3, 0x37, 0xff, 0x04, 0xdf, 0x4d, 0xfc,
+	0x57, 0x75, 0x77, 0xef, 0xf6, 0x38, 0xf0, 0x62, 0x02, 0x0f, 0xc7, 0xce, 0xec, 0xec, 0x67, 0x66,
+	0x3e, 0x3b, 0x9f, 0x85, 0xa3, 0xd9, 0x2d, 0xe7, 0x3d, 0xf5, 0x89, 0x7b, 0x6e, 0xec, 0xf7, 0xe2,
+	0x85, 0x2b, 0x6e, 0x23, 0x16, 0x74, 0x63, 0x16, 0x89, 0x08, 0x55, 0xa4, 0x0f, 0x0f, 0xe0, 0x80,
+	0xd0, 0x3b, 0x9f, 0x0b, 0xca, 0x08, 0xfd, 0xba, 0xa4, 0x5c, 0xa0, 0x43, 0xd8, 0xa1, 0x81, 0xeb,
+	0x2f, 0xda, 0xd6, 0xb1, 0x75, 0x52, 0x23, 0x89, 0x81, 0xda, 0xb0, 0xc7, 0x92, 0x80, 0x76, 0x59,
+	0xfb, 0x8d, 0x89, 0x7f, 0x59, 0x50, 0x1b, 0x31, 0x16, 0xb1, 0x61, 0x34, 0xa3, 0xe8, 0x19, 0xd8,
+	0x9e, 0xfc, 0xd7, 0x87, 0x9b, 0xfd, 0x56, 0x57, 0x26, 0xe9, 0x66, 0xbb, 0x5d, 0xf5, 0x21, 0x3a,
+	0x40, 0x01, 0x06, 0x94, 0x73, 0xf7, 0x8e, 0x1a, 0xc0, 0xd4, 0xc4, 0x63, 0xb0, 0x35, 0x54, 0x1d,
+	0xf6, 0x26, 0xd3, 0xe1, 0x70, 0x34, 0x99, 0x38, 0x25, 0x04, 0xb0, 0x7b, 0x39, 0xfe, 0x30, 0x20,
+	0xe7, 0x8e, 0xa5, 0x36, 0xce, 0x06, 0xef, 0x06, 0xd3, 0x9b, 0x0b, 0xa7, 0xac, 0x8c, 0x8f, 0x03,
+	0x32, 0xbe, 0x1c, 0x9f, 0x3b, 0x15, 0xd4, 0x52, 0x51, 0x37, 0x23, 0x42, 0x9c, 0xdf, 0xe6, 0x67,
+	0xe1, 0x37, 0x50, 0x1f, 0x2c, 0xc5, 0xfc, 0xdf, 0xfd, 0x49, 0xaf, 0x88, 0xee, 0x69, 0x98, 0x16,
+	0x93, 0x18, 0xf8, 0x14, 0x9a, 0x86, 0x1e, 0x3a, 0x9b, 0x72, 0xca, 0xd0, 0x13, 0x00, 0x6f, 0xe1,
+	0xd3, 0x50, 0x0c, 0x29, 0x13, 0x29, 0x44, 0xce, 0x83, 0xf7, 0x60, 0x67, 0x14, 0xc4, 0xe2, 0x01,
+	0x7f, 0x83, 0xd6, 0x75, 0xc4, 0xc5, 0x30, 0x0a, 0x05, 0x73, 0x3d, 0x61, 0xb2, 0x23, 0xb0, 0xe7,
+	0x2e, 0x9f, 0xeb, 0x93, 0xfb, 0x44, 0xaf, 0x51, 0x07, 0xaa, 0xb7, 0xfe, 0x82, 0x86, 0x6e, 0x60,
+	0xb8, 0xc8, 0x6c, 0xf4, 0x3f, 0xec, 0x72, 0xff, 0x2e, 0xa4, 0xac, 0x5d, 0x39, 0xae, 0xc8, 0x9d,
+	0xd4, 0x52, 0xf4, 0x79, 0x51, 0x10, 0xc8, 0xb4, 0x6d, 0x3b, 0xa1, 0x2f, 0x35, 0xf1, 0x09, 0xa0,
+	0x73, 0x5a, 0x94, 0x77, 0xb9, 0xf4, 0x67, 0x69, 0xc5, 0x7a, 0x8d, 0xaf, 0xa0, 0x6a, 0xc2, 0xd0,
+	0x0b, 0xa8, 0x51, 0x73, 0x4d, 0x3a, 0xa8, 0xde, 0x6f, 0xae, 0x5f, 0x1e, 0x59, 0x05, 0x28, 0xb4,
+	0x2f, 0x3c, 0x4a, 0xc8, 0x92, 0x5d, 0xa8, 0xb5, 0xbc, 0xb6, 0xc3, 0xf7, 0x91, 0x1f, 0x4e, 0x64,
+	0x7d, 0xae, 0x58, 0x32, 0x6a, 0x32, 0x63, 0xd8, 0xf7, 0xd2, 0x2c, 0xd3, 0x55, 0x05, 0x6b, 0x3e,
+	0x85, 0x17, 0x47, 0x2c, 0x19, 0xad, 0x06, 0xd1, 0x6b, 0xfc, 0xdd, 0x82, 0x86, 0xa2, 0x5c, 0x96,
+	0x18, 0x52, 0x4f, 0xd0, 0xd9, 0x96, 0x35, 0x6e, 0xe6, 0x2d, 0x17, 0xe4, 0x3d, 0x92, 0xac, 0x70,
+	0xcd, 0xad, 0x02, 0xab, 0x69, 0x30, 0x95, 0x93, 0x68, 0x37, 0xfe, 0x04, 0xb6, 0xbe, 0x74, 0x49,
+	0xf6, 0x3d, 0x7d, 0xb8, 0x58, 0xdd, 0x9b, 0x31, 0x57, 0xc3, 0x54, 0xce, 0x0f, 0x53, 0x13, 0xca,
+	0x7e, 0xac, 0x41, 0x6b, 0x44, 0xae, 0xb2, 0xf6, 0xec, 0x5c, 0x7b, 0xaf, 0xc0, 0x21, 0xd4, 0x9d,
+	0x3d, 0x28, 0xbe, 0xb6, 0xa0, 0x0a, 0xff, 0xb4, 0xe0, 0xe0, 0xca, 0x5d, 0x86, 0xde, 0x3c, 0x63,
+	0x7a, 0x4b, 0x62, 0x9e, 0x42, 0x83, 0x9b, 0xa3, 0x39, 0x66, 0xd6, 0x9d, 0xf9, 0x9e, 0xd5, 0xe4,
+	0xe5, 0x7a, 0x96, 0xe3, 0xca, 0x55, 0xc1, 0xa1, 0x47, 0x65, 0x47, 0x15, 0xd9, 0x51, 0x66, 0xf7,
+	0x7f, 0x54, 0xa0, 0x7a, 0x9d, 0xbe, 0x33, 0xa8, 0x0f, 0x55, 0xa3, 0x1e, 0x74, 0xa8, 0xeb, 0xd9,
+	0x78, 0x6b, 0x3a, 0x1b, 0x55, 0xe2, 0x12, 0xea, 0x81, 0xad, 0xc4, 0x8a, 0x1c, 0xbd, 0x93, 0xd3,
+	0x6d, 0xa7, 0xb5, 0x86, 0x90, 0xc8, 0x51, 0x1e, 0x78, 0x0e, 0x30, 0x0d, 0x99, 0x49, 0x03, 0x09,
+	0xa0, 0x52, 0x60, 0x01, 0xf8, 0x5b, 0xd8, 0xcf, 0x6b, 0x12, 0xb5, 0x75, 0x44, 0x81, 0x4c, 0x0b,
+	0xce, 0xbe, 0x86, 0x7a, 0x4e, 0x56, 0xe8, 0x91, 0x0e, 0xf8, 0x5b, 0x68, 0x9d, 0x86, 0xde, 0x30,
+	0x5e, 0x79, 0xf0, 0x0c, 0x1a, 0x6b, 0xba, 0x40, 0x8f, 0x75, 0x44, 0x91, 0x56, 0x3a, 0x28, 0x9b,
+	0xc0, 0x6c, 0xea, 0x71, 0xe9, 0xd4, 0x92, 0x85, 0xd7, 0xb2, 0x61, 0x41, 0xff, 0xa5, 0x44, 0xac,
+	0x0f, 0x4f, 0x27, 0x61, 0x78, 0x63, 0x34, 0x70, 0xe9, 0xf3, 0xae, 0x7e, 0xee, 0x5f, 0xfe, 0x09,
+	0x00, 0x00, 0xff, 0xff, 0x57, 0x09, 0xac, 0xbb, 0x0f, 0x06, 0x00, 0x00,
 }

dfssp/api/platform.proto

@@ -7,6 +7,7 @@ service Platform {
 	rpc Auth(AuthRequest) returns (RegisteredUser) {}
 	rpc Unregister(Empty) returns (ErrorCode) {}
 	rpc PostContract(PostContractRequest) returns (ErrorCode) {}
+	rpc GetContract(GetContractRequest) returns (Contract) {}
 	rpc JoinSignature(JoinSignatureRequest) returns (stream UserConnected) {}
 	rpc ReadySign(ReadySignRequest) returns (LaunchSignature) {} // Warning, LaunchSignature can be emitted with a very high delay
 }
@@ -63,6 +64,18 @@ message PostContractRequest {
 	string comment = 4;
 }
 
+// GetContractRequest message contains the uuid of the asked contract
+message GetContractRequest {
+	string uuid = 1;
+}
+
+// Contract is the return value when a contract is fetched from the platform.
+// The contract is in json format to avoid duplicating structures.
+message Contract {
+	ErrorCode errorCode = 1;
+	bytes json = 2;
+}
+
 // JoinSignatureRequest message contains the contract to join unique identifier
 // and the port the client will be listening at
 message JoinSignatureRequest {

dfssp/contract/contract_test.go

@@ -14,7 +14,6 @@ import (
 	"gopkg.in/mgo.v2/bson"
 )
 
-var err error
 var collection *mgdb.MongoCollection
 var manager *mgdb.MongoManager
 var dbURI string
@@ -28,6 +27,7 @@ func TestMain(m *testing.M) {
 		dbURI = "mongodb://localhost/dfss-test"
 	}
 
+	var err error
 	manager, err = mgdb.NewManager(dbURI)
 	if err != nil {
 		fmt.Println(err)
@@ -157,16 +157,26 @@ func TestCheckAuthorization(t *testing.T) {
 	createDataset()
 	id := addTestContract()
 
-	assert.T(t, repository.CheckAuthorization(user1.CertHash, id))
-	assert.T(t, !repository.CheckAuthorization(user1.CertHash, bson.NewObjectId()))
-	assert.T(t, !repository.CheckAuthorization(user2.CertHash, id))
-	assert.T(t, !repository.CheckAuthorization(user2.CertHash, bson.NewObjectId()))
+	res, err := repository.GetWithSigner(user1.CertHash, id)
+	assert.Equal(t, nil, err)
+	assert.T(t, res != nil)
+	res, err = repository.GetWithSigner(user1.CertHash, bson.NewObjectId())
+	assert.Equal(t, nil, err)
+	assert.T(t, res == nil)
+	res, err = repository.GetWithSigner(user2.CertHash, id)
+	assert.Equal(t, nil, err)
+	assert.T(t, res == nil)
+	res, err = repository.GetWithSigner(user2.CertHash, bson.NewObjectId())
+	assert.Equal(t, nil, err)
+	assert.T(t, res == nil)
 
 	contract := entities.Contract{}
 	_ = repository.Collection.FindByID(entities.Contract{ID: id}, &contract)
 	contract.Ready = false
 	_, _ = repository.Collection.UpdateByID(contract)
 
-	// Not valid if contract is not ready
-	assert.T(t, !repository.CheckAuthorization(user1.CertHash, id))
+	// Still valid if contract is not ready
+	res, _ = repository.GetWithSigner(user1.CertHash, id)
+	assert.T(t, res != nil)
+	assert.T(t, !res.Ready)
 }

dfssp/contract/create_test.go

@@ -20,7 +20,6 @@ var user1, user2, user3 *entities.User
 var defaultHash = sha512.Sum512([]byte{0})
 
 func createDataset() {
-
 	user1 = entities.NewUser() // Regular user
 	user2 = entities.NewUser() // Regular user
 	user3 = entities.NewUser() // Non-auth user
@@ -43,14 +42,11 @@ func createDataset() {
 	_, _ = manager.Get("users").Insert(user1)
 	_, _ = manager.Get("users").Insert(user2)
 	_, _ = manager.Get("users").Insert(user3)
-
 }
 
 func dropDataset() {
-
 	_ = manager.Get("users").Drop()
 	_ = manager.Get("contracts").Drop()
-
 }
 
 func clientTest(t *testing.T) api.PlatformClient {

dfssp/contract/fetch.go

+package contract
+
+import (
+	"dfss/dfssp/api"
+	"dfss/dfssp/entities"
+	"dfss/mgdb"
+	"gopkg.in/mgo.v2/bson"
+)
+
+// Fetch returns the protobuf message when asking a specific contract containing a specific user.
+func Fetch(db *mgdb.MongoManager, contractUUID string, clientHash []byte) *api.Contract {
+	if !bson.IsObjectIdHex(contractUUID) {
+		return &api.Contract{
+			ErrorCode: &api.ErrorCode{Code: api.ErrorCode_INVARG},
+		}
+	}
+
+	repository := entities.NewContractRepository(db.Get("contracts"))
+	contract, _ := repository.GetWithSigner(clientHash, bson.ObjectIdHex(contractUUID))
+	if contract == nil {
+		return &api.Contract{
+			ErrorCode: &api.ErrorCode{Code: api.ErrorCode_BADAUTH},
+		}
+	}
+
+	data, err := GetJSON(contract, nil)
+	if err != nil {
+		return &api.Contract{
+			ErrorCode: &api.ErrorCode{Code: api.ErrorCode_INTERR},
+		}
+	}
+
+	return &api.Contract{
+		ErrorCode: &api.ErrorCode{Code: api.ErrorCode_SUCCESS},
+		Json:      data,
+	}
+}

dfssp/contract/fetch_test.go

+package contract_test
+
+import (
+	"encoding/json"
+	"testing"
+
+	"dfss/dfssp/api"
+	"dfss/dfssp/contract"
+	"dfss/dfssp/entities"
+	"github.com/bmizerany/assert"
+	"golang.org/x/net/context"
+	"gopkg.in/mgo.v2/bson"
+)
+
+var contract1 *entities.Contract
+
+func insertTestContract(insertUser1 bool) {
+	contract1 = entities.NewContract()
+	if insertUser1 {
+		contract1.AddSigner(&user1.ID, user1.Email, user1.CertHash)
+	}
+	contract1.AddSigner(&user2.ID, user2.Email, user2.CertHash)
+	_, _ = manager.Get("contracts").Insert(contract1)
+}
+
+func TestGetContract(t *testing.T) {
+	dropDataset()
+	createDataset()
+	insertTestContract(true)
+
+	client := clientTest(t)
+	c, err := client.GetContract(context.Background(), &api.GetContractRequest{
+		Uuid: contract1.ID.Hex(),
+	})
+	assert.Equal(t, nil, err)
+	assert.Equal(t, api.ErrorCode_SUCCESS, c.ErrorCode.Code)
+	assert.T(t, len(c.Json) > 0)
+
+	// Trying to unmarshal contract
+	var entity contract.JSON
+	err = json.Unmarshal(c.Json, &entity)
+	assert.Equal(t, nil, err)
+	assert.Equal(t, 2, len(entity.Signers))
+}
+
+func TestGetContractWrongSigner(t *testing.T) {
+	dropDataset()
+	createDataset()
+	insertTestContract(false)
+
+	client := clientTest(t)
+	c, err := client.GetContract(context.Background(), &api.GetContractRequest{
+		Uuid: contract1.ID.Hex(),
+	})
+	assert.Equal(t, nil, err)
+	assert.Equal(t, api.ErrorCode_BADAUTH, c.ErrorCode.Code)
+	assert.Equal(t, 0, len(c.Json))
+}
+
+func TestGetContractWrongContract(t *testing.T) {
+	dropDataset()
+	createDataset()
+	insertTestContract(true)
+
+	client := clientTest(t)
+	c, err := client.GetContract(context.Background(), &api.GetContractRequest{
+		Uuid: bson.NewObjectId().Hex(),
+	})
+	assert.Equal(t, nil, err)
+	assert.Equal(t, api.ErrorCode_BADAUTH, c.ErrorCode.Code)
+	assert.Equal(t, 0, len(c.Json))
+}
+
+func TestGetContractWrongContractUUID(t *testing.T) {
+	dropDataset()
+	createDataset()
+	insertTestContract(true)
+
+	client := clientTest(t)
+	c, err := client.GetContract(context.Background(), &api.GetContractRequest{
+		Uuid: "wrongUUID",
+	})
+	assert.Equal(t, nil, err)
+	assert.Equal(t, api.ErrorCode_INVARG, c.ErrorCode.Code)
+	assert.Equal(t, 0, len(c.Json))
+}

dfssp/contract/file.go

@@ -39,7 +39,6 @@ type JSON struct {
 
 // GetJSON returns indented json from a contract and some ttp information (nil allowed)
 func GetJSON(c *entities.Contract, ttp *TTPJSON) ([]byte, error) {
-
 	data := JSON{
 		UUID:    c.ID.Hex(),
 		Date:    &c.Date,

dfssp/contract/join.go

@@ -84,7 +84,8 @@ func checkJoinSignatureRequest(db *mgdb.MongoManager, stream *api.Platform_JoinS
 	}
 
 	repository := entities.NewContractRepository(db.Get("contracts"))
-	if !repository.CheckAuthorization(clientHash, bson.ObjectIdHex(contractUUID)) {
+	contract, _ := repository.GetWithSigner(clientHash, bson.ObjectIdHex(contractUUID))
+	if contract == nil || !contract.Ready {
 		_ = (*stream).Send(&api.UserConnected{
 			ErrorCode: &api.ErrorCode{
 				Code:    api.ErrorCode_INVARG,

dfssp/entities/contract.go

@@ -4,6 +4,7 @@ import (
 	"dfss/mgdb"
 	"time"
 
+	"gopkg.in/mgo.v2"
 	"gopkg.in/mgo.v2/bson"
 )
 
@@ -94,16 +95,20 @@ func (r *ContractRepository) GetWaitingForUser(email string) ([]Contract, error)
 	return res, err
 }
 
-// CheckAuthorization checks that a client is allowed to sign a specific contract
-func (r *ContractRepository) CheckAuthorization(signerHash []byte, contractID bson.ObjectId) bool {
-
-	count, _ := r.Collection.Collection.Find(bson.M{
-		"_id":   contractID,
-		"ready": true,
+// GetWithSigner returns the contract corresponding to an UUID and containing a specific signer, or nil if no contract matches.
+func (r *ContractRepository) GetWithSigner(signerHash []byte, contractUUID bson.ObjectId) (contract *Contract, err error) {
+	contract = new(Contract)
+	err = r.Collection.Collection.Find(bson.M{
+		"_id": contractUUID,
 		"signers": bson.M{
 			"$elemMatch": bson.M{"hash": signerHash},
 		},
-	}).Count()
+	}).One(contract)
 
-	return count == 1
+	if err == mgo.ErrNotFound {
+		contract = nil
+		err = nil
+		return
+	}
+	return
 }

dfssp/server/server.go

@@ -49,7 +49,6 @@ func (s *platformServer) Unregister(ctx context.Context, in *api.Empty) (*api.Er
 //
 // Handle incoming PostContractRequest messages
 func (s *platformServer) PostContract(ctx context.Context, in *api.PostContractRequest) (*api.ErrorCode, error) {

[Richer Maximilien]

Good thing to send the JSON here :thumbs_up_reverse: