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impl thrift (de)serialyze (#1)

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.gitignore vendored Normal file
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log
logs
/_build/
/rebar.lock
*~
*.beam
erl_crash.dump
dev.config
.tags*
*.sublime-workspace
.DS_Store
docker-compose.yml

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[submodule "build_utils"]
path = build_utils
url = "git@github.com:rbkmoney/build_utils.git"

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#!groovy
// -*- mode: groovy -*-
def finalHook = {
runStage('store CT logs') {
archive '_build/test/logs/'
}
}
build('lechiffre', 'docker-host', finalHook) {
checkoutRepo()
loadBuildUtils()
def pipeDefault
def withWsCache
runStage('load pipeline') {
env.JENKINS_LIB = "build_utils/jenkins_lib"
pipeDefault = load("${env.JENKINS_LIB}/pipeDefault.groovy")
withWsCache = load("${env.JENKINS_LIB}/withWsCache.groovy")
}
pipeDefault() {
if (env.BRANCH_NAME != 'master') {
runStage('compile') {
withGithubPrivkey {
sh 'make wc_compile'
}
}
runStage('lint') {
sh 'make wc_lint'
}
runStage('xref') {
sh 'make wc_xref'
}
runStage('dialyze') {
withWsCache("_build/default/rebar3_21.3.8.7_plt") {
sh 'make wc_dialyze'
}
}
runStage('test') {
sh "make wc_test"
}
}
}
}

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5. Submission of Contributions. Unless You explicitly state otherwise,
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6. Trademarks. This License does not grant permission to use the trade
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7. Disclaimer of Warranty. Unless required by applicable law or
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REBAR ?= $(shell which rebar3 2>/dev/null || which ./rebar3)
SUBMODULES = build_utils
SUBTARGETS = $(patsubst %,%/.git,$(SUBMODULES))
UTILS_PATH := build_utils
TEMPLATES_PATH := .
# Name of the service
SERVICE_NAME := lechiffre
# Service image default tag
SERVICE_IMAGE_TAG ?= $(shell git rev-parse HEAD)
# The tag for service image to be pushed with
SERVICE_IMAGE_PUSH_TAG ?= $(SERVICE_IMAGE_TAG)
# Base image for the service
BASE_IMAGE_NAME := service-erlang
BASE_IMAGE_TAG := da0ab769f01b650b389d18fc85e7418e727cbe96
BUILD_IMAGE_TAG := 4536c31941b9c27c134e8daf0fd18848809219c9
CALL_ANYWHERE := \
submodules \
all compile xref lint dialyze test cover \
start devrel release clean distclean
CALL_W_CONTAINER := $(CALL_ANYWHERE)
.PHONY: $(CALL_W_CONTAINER) all
all: compile
-include $(UTILS_PATH)/make_lib/utils_container.mk
-include $(UTILS_PATH)/make_lib/utils_image.mk
$(SUBTARGETS): %/.git: %
git submodule update --init $<
touch $@
submodules: $(SUBTARGETS)
compile: submodules
$(REBAR) compile
test:
$(REBAR) ct
clean:
$(REBAR) clean
distclean:
$(REBAR) clean -a
xref:
$(REBAR) xref
dialyze:
$(REBAR) dialyzer
lint:
elvis rock

16
README.md
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# lechiffre
# Le Chiffre
________________ _______________ ________
| | | | encrypt | |
| VersionedToken | --------> | Thrift Binary | --------> | Binary |
| | | | | |
---------------- --------------- --------
________ _______________ ________________
| | decrypt | | | |
| Binary | ---------> | Thrift Binary | ----------> | VersionedToken |
| | | | | |
-------- --------------- ----------------

1
build_utils Submodule

@ -0,0 +1 @@
Subproject commit ea4aa042f482551d624fd49a570d28488f479e93

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elvis.config Normal file
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[
{elvis, [
{config, [
#{
dirs => ["src"],
filter => "*.erl",
rules => [
{elvis_style, line_length, #{limit => 120, skip_comments => false}},
{elvis_style, no_tabs},
{elvis_style, no_trailing_whitespace},
{elvis_style, macro_module_names},
{elvis_style, operator_spaces, #{rules => [{right, ","}, {right, "++"}, {left, "++"}]}},
{elvis_style, nesting_level, #{level => 3}},
{elvis_style, god_modules, #{limit => 25}},
{elvis_style, no_if_expression},
{elvis_style, invalid_dynamic_call, #{ignore => [elvis]}},
{elvis_style, used_ignored_variable},
{elvis_style, no_behavior_info},
{elvis_style, module_naming_convention, #{regex => "^([a-z][a-z0-9]*_?)*(_SUITE)?$"}},
{elvis_style, function_naming_convention, #{regex => "^([a-z][a-z0-9]*_?)*$"}},
{elvis_style, state_record_and_type},
{elvis_style, no_spec_with_records},
{elvis_style, dont_repeat_yourself, #{min_complexity => 10}},
{elvis_style, no_debug_call, #{ignore => [elvis, elvis_utils]}}
]
},
#{
dirs => ["/test"],
filter => "*.erl",
rules => [
{elvis_style, line_length, #{limit => 120, skip_comments => false}},
{elvis_style, no_tabs},
{elvis_style, no_trailing_whitespace},
{elvis_style, macro_module_names},
{elvis_style, operator_spaces, #{rules => [{right, ","}, {right, "++"}, {left, "++"}]}},
{elvis_style, nesting_level, #{level => 3}},
{elvis_style, god_modules, #{limit => 25}},
{elvis_style, no_if_expression},
{elvis_style, invalid_dynamic_call, #{ignore => [elvis]}},
{elvis_style, used_ignored_variable},
{elvis_style, no_behavior_info},
{elvis_style, module_naming_convention, #{regex => "^([a-z][a-z0-9]*_?)*(_SUITE)?$"}},
{elvis_style, function_naming_convention, #{regex => "^([a-z][a-z0-9]*_?)*$"}},
{elvis_style, state_record_and_type},
{elvis_style, no_spec_with_records},
{elvis_style, no_debug_call, #{ignore => [elvis, elvis_utils]}}
]
},
#{
dirs => ["."],
filter => "Makefile",
ruleset => makefiles
},
#{
dirs => ["."],
filter => "elvis.config",
ruleset => elvis_config
},
#{
dirs => ["."],
filter => "rebar.config",
rules => [
{elvis_style, line_length, #{limit => 120, skip_comments => false}},
{elvis_style, no_tabs},
{elvis_style, no_trailing_whitespace}
]
},
#{
dirs => ["."],
filter => "rebar.config",
rules => [
{elvis_style, line_length, #{limit => 120, skip_comments => false}},
{elvis_style, no_tabs},
{elvis_style, no_trailing_whitespace}
]
},
#{
dirs => ["src"],
filter => "*.app.src",
rules => [
{elvis_style, line_length, #{limit => 120, skip_comments => false}},
{elvis_style, no_tabs},
{elvis_style, no_trailing_whitespace}
]
}
]}
]}
].

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rebar.config Normal file
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{erl_opts, [
% mandatory
debug_info,
warnings_as_errors,
warn_export_all,
warn_missing_spec,
warn_untyped_record,
warn_export_vars,
% by default
warn_unused_record,
warn_bif_clash,
warn_obsolete_guard,
warn_unused_vars,
warn_shadow_vars,
warn_unused_import,
warn_unused_function,
warn_deprecated_function,
% at will
% bin_opt_info
% no_auto_import
warn_missing_spec_all
]}.
{deps, [
{genlib, {git, "https://github.com/rbkmoney/genlib.git", {branch, "master"}}},
{thrift, {git, "https://github.com/rbkmoney/thrift_erlang.git", {branch, "master"}}}
]}.
{xref_checks, [
undefined_function_calls,
undefined_functions,
deprecated_functions_calls,
deprecated_functions
]}.
{dialyzer, [
{warnings, [
unmatched_returns,
error_handling,
race_conditions,
unknown
]}
]}.

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{application, lechiffre, [
{description, "Encrypt/decrypt data, described in thrift protocol"},
{vsn, "0.1"},
{registered, []},
{applications, [
kernel,
stdlib,
thrift,
genlib
]}
]}.

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src/lechiffre.erl Normal file
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-module(lechiffre).
-define(SECRET_KEYS_TABLE, ?MODULE).
-behaviour(gen_server).
-type options() :: #{
encryption_key_path := {key_version(), key_path()},
decryption_key_path := #{
key_version() := key_path()
}
}.
-type key_path() :: binary().
-type key_version() :: lechiffre_crypto:key_version().
-type secret_keys() :: lechiffre_crypto:secret_keys().
-type data() :: term().
-type encoded_data() :: binary().
-type encoding_error() :: {encryption_failed, lechiffre_crypto:encryption_error()} |
lechiffre_thrift_utils:thrift_error().
-type decoding_error() :: {decryption_failed, lechiffre_crypto:decryption_error()} |
lechiffre_thrift_utils:thrift_error().
-type thrift_type() :: lechiffre_thrift_utils:thrift_type().
-export_type([secret_keys/0]).
-export_type([encoding_error/0]).
-export_type([decoding_error/0]).
%% GenServer
-export([child_spec/2]).
-export([start_link/1]).
-export([init /1]).
-export([handle_call/3]).
-export([handle_cast/2]).
-export([handle_info/2]).
-export([terminate /2]).
-export([code_change/3]).
-export([encode/2]).
-export([encode/3]).
-export([decode/2]).
-export([decode/3]).
-spec child_spec(atom(), options()) ->
supervisor:child_spec().
child_spec(ChildId, Options) ->
#{
id => ChildId,
start => {?MODULE, start_link, [Options]},
type => worker,
restart => permanent
}.
-spec start_link(options()) ->
{ok, pid()}.
start_link(Options) ->
gen_server:start_link(?MODULE, Options, []).
-spec encode(thrift_type(), data()) ->
{ok, encoded_data()} |
{error, encoding_error()}.
encode(ThriftType, Data) ->
SecretKeys = lookup_secret_value(),
case lechiffre_thrift_utils:serialize(ThriftType, Data) of
{ok, ThriftBin} ->
lechiffre_crypto:encrypt(SecretKeys, ThriftBin);
{error, _} = Error ->
{error, {serialization_failed, Error}}
end.
-spec encode(thrift_type(), data(), secret_keys()) ->
{ok, encoded_data()} |
{error, encoding_error()}.
encode(ThriftType, Data, SecretKeys) ->
case lechiffre_thrift_utils:serialize(ThriftType, Data) of
{ok, ThriftBin} ->
lechiffre_crypto:encrypt(SecretKeys, ThriftBin);
{error, _} = Error ->
{error, {serialization_failed, Error}}
end.
-spec decode(thrift_type(), encoded_data()) ->
{ok, data()} |
{error, decoding_error()}.
decode(ThriftType, EncryptedData) ->
SecretKeys = lookup_secret_value(),
case lechiffre_crypto:decrypt(SecretKeys, EncryptedData) of
{ok, ThriftBin} ->
lechiffre_thrift_utils:deserialize(ThriftType, ThriftBin);
DecryptError ->
DecryptError
end.
-spec decode(thrift_type(), encoded_data(), secret_keys()) ->
{ok, data()} |
{error, decoding_error()}.
decode(ThriftType, EncryptedData, SecretKeys) ->
case lechiffre_crypto:decrypt(SecretKeys, EncryptedData) of
{ok, ThriftBin} ->
lechiffre_thrift_utils:deserialize(ThriftType, ThriftBin);
DecryptError ->
DecryptError
end.
%% Supervisor
-type st() :: #{
options => options()
}.
-spec init(options()) ->
{ok, st()}.
init(Options) ->
SecretKeys = read_secret_keys(Options),
ok = create_table(SecretKeys),
{ok, #{options => Options}}.
-spec handle_call(term(), term(), st()) ->
{reply, term(), st()} | {noreply, st()}.
handle_call(Call, _From, State) ->
_ = logger:warning("unexpected call received: ~tp", [Call]),
{noreply, State}.
-spec handle_cast(_, st()) ->
{noreply, st()}.
handle_cast(Cast, State) ->
_ = logger:warning("unexpected cast received: ~tp", [Cast]),
{noreply, State}.
-spec handle_info(_, st()) ->
{noreply, st()}.
handle_info(Info, State) ->
_ = logger:warning("unexpected info received: ~tp", [Info]),
{noreply, State}.
-spec terminate(Reason, atom()) ->
ok when
Reason :: normal | shutdown | {shutdown, term()} | term().
terminate(_Reason, _State) ->
ok.
-spec code_change(term(), term(), term()) -> {ok, atom()}.
code_change(_OldVsn, State, _Extra) ->
{ok, State}.
%%
-spec read_secret_keys(options()) -> secret_keys().
read_secret_keys(Options) ->
{Ver, EncryptionPath} = maps:get(encryption_key_path, Options),
DecryptionKeysPath = maps:get(decryption_key_path, Options),
DecryptionKeys = maps:fold(fun(KeyVer, Path, Acc) ->
SecretKey = read_key_file(Path),
Acc#{
KeyVer => SecretKey
}
end, #{}, DecryptionKeysPath),
EncryptionKey = read_key_file(EncryptionPath),
#{
encryption_key => {Ver, EncryptionKey},
decryption_key => DecryptionKeys
}.
-spec read_key_file(binary()) -> binary().
read_key_file(SecretPath) ->
{ok, Secret} = file:read_file(SecretPath),
genlib_string:trim(Secret).
-spec create_table(secret_keys()) -> ok.
create_table(SecretKeys) ->
_ = ets:new(?SECRET_KEYS_TABLE, [set, public, named_table, {read_concurrency, true}]),
insert_secret_value(SecretKeys),
ok.
-spec insert_secret_value(secret_keys()) -> ok.
insert_secret_value(SecretKeys) ->
true = ets:insert(?SECRET_KEYS_TABLE, [{secret, SecretKeys}]),
ok.
-spec lookup_secret_value() -> secret_keys().
lookup_secret_value() ->
[{secret, SecretKeys}] = ets:lookup(?SECRET_KEYS_TABLE, secret),
SecretKeys.

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src/lechiffre_crypto.erl Normal file
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-module(lechiffre_crypto).
-define(MAX_UINT_32, 4294967295).
-type key_version() :: 1..?MAX_UINT_32.
-type key() :: <<_:256>>.
-type decryption_keys() :: #{
key_version() := key()
}.
-type secret_keys() :: #{
encryption_key := {key_version(), key()},
decryption_key := decryption_keys()
}.
-type iv() :: binary().
-type tag() :: binary().
-type aad() :: binary().
%% Encrypted Data Format
-record(edf, {
version :: binary(),
tag :: tag(),
iv :: iv(),
aad :: aad(),
cipher :: binary(),
key_version :: key_version()
}).
-type edf() :: #edf{}.
-type decryption_error() :: {decryption_failed, decryption_validation_failed |
bad_encrypted_data_format |
wrong_data_type |
{unknown_key_version, key_version()}
}.
-type encryption_error() :: {encryption_failed, wrong_data_type}.
-export_type([decryption_keys/0]).
-export_type([encryption_error/0]).
-export_type([decryption_error/0]).
-export_type([secret_keys/0]).
-export_type([key_version/0]).
-export([encrypt/2]).
-export([decrypt/2]).
-spec encrypt(secret_keys(), binary()) ->
{ok, binary()} |
{error, {encryption_failed, wrong_data_type}}.
encrypt(#{encryption_key := {KeyVer, Key}}, Plain) ->
IV = iv(),
AAD = aad(),
Version = <<"edf_v1">>,
try
{Cipher, Tag} = crypto:block_encrypt(aes_gcm, Key, IV, {AAD, Plain}),
EncryptedData = marshal_edf(#edf{
version = Version,
key_version = KeyVer,
iv = IV,
aad = AAD,
cipher = Cipher,
tag = Tag}),
{ok, EncryptedData}
catch error:badarg ->
{error, {encryption_failed, wrong_data_type}}
end.
-spec decrypt(secret_keys(), binary()) ->
{ok, binary()} |
{error, decryption_error()}.
decrypt(SecretKeys, MarshalledEDF) ->
try
#edf{
iv = IV,
aad = AAD,
cipher = Cipher,
tag = Tag,
key_version = KeyVer} = unmarshal_edf(MarshalledEDF),
Key = get_key(KeyVer, SecretKeys),
crypto:block_decrypt(aes_gcm, Key, IV, {AAD, Cipher, Tag})
of
error ->
{error, {decryption_failed, decryption_validation_failed}};
Plain ->
{ok, Plain}
catch
throw:bad_encrypted_data_format ->
{error, {decryption_failed, bad_encrypted_data_format}};
throw:{unknown_key_version, Ver} ->
{error, {decryption_failed, {unknown_key_version, Ver}}};
error:badarg ->
{error, {decryption_failed, wrong_data_type}}
end.
%%% Internal functions
-spec get_key(key_version(), secret_keys()) -> key().
get_key(KeyVer, #{decryption_key := Keys}) ->
case maps:find(KeyVer, Keys) of
{ok, Key} ->
Key;
error ->
throw({unknown_key_version, KeyVer})
end.
-spec iv() -> iv().
iv() ->
crypto:strong_rand_bytes(16).
-spec aad() -> aad().
aad() ->
crypto:strong_rand_bytes(4).
-spec marshal_edf(edf()) -> binary().
marshal_edf(#edf{version = Ver, key_version = KeyVer, tag = Tag, iv = IV, aad = AAD, cipher = Cipher})
when
KeyVer > 0 andalso KeyVer < ?MAX_UINT_32, %% max value unsinged integer 4 byte
bit_size(Tag) =:= 128,
bit_size(IV) =:= 128,
bit_size(AAD) =:= 32
->
<<Ver:6/binary, KeyVer:32/integer, Tag:16/binary, IV:16/binary, AAD:4/binary, Cipher/binary>>.
-spec unmarshal_edf(binary()) -> edf().
unmarshal_edf(<<Ver:6/binary, KeyVer:32/integer, Tag:16/binary, IV:16/binary, AAD:4/binary, Cipher/binary>>)
when Ver =:= <<"edf_v1">> ->
#edf{
version = <<"edf_v1">>,
tag = Tag,
iv = IV,
aad = AAD,
cipher = Cipher,
key_version = KeyVer
};
unmarshal_edf(_Other) ->
throw(bad_encrypted_data_format).

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-module(lechiffre_thrift_utils).
-export([serialize/2]).
-export([deserialize/2]).
%% Types
-type thrift_type() ::
thrift_base_type() |
thrift_collection_type() |
thrift_enum_type() |
thrift_struct_type().
-type thrift_base_type() ::
bool |
double |
i8 |
i16 |
i32 |
i64 |
string.
-type thrift_collection_type() ::
{list, thrift_type()} |
{set, thrift_type()} |
{map, thrift_type(), thrift_type()}.
-type thrift_enum_type() ::
{enum, thrift_type_ref()}.
-type thrift_struct_type() ::
{struct, thrift_struct_flavor(), thrift_type_ref() | thrift_struct_def()}.
-type thrift_struct_flavor() :: struct | union | exception.
-type thrift_type_ref() :: {module(), Name :: atom()}.
-type thrift_struct_def() :: list({
Tag :: pos_integer(),
Requireness :: required | optional | undefined,
Type :: thrift_struct_type(),
Name :: atom(),
Default :: any()
}).
-type thrift_error() :: {serialization_failed, {thrift_protocol, any()}} |
{deserialization_failed, {thrift_protocol, any()}}.
-export_type([thrift_type/0]).
-export_type([thrift_error/0]).
%% API
-spec serialize(thrift_type(), term()) ->
{ok, binary()} | {error, thrift_error()}.
serialize(Type, Data) ->
{ok, Transport} = thrift_membuffer_transport:new(),
{ok, Proto} = new_protocol(Transport),
case thrift_protocol:write(Proto, {Type, Data}) of
{NewProto, ok} ->
{_, {ok, Result}} = thrift_protocol:close_transport(NewProto),
{ok, Result};
{_NewProto, {error, {thrift, {protocol, Reason}}}} ->
{error, {serialization_failed, {thrift_protocol, Reason}}}
end.
-spec deserialize(thrift_type(), binary()) ->
{ok, term()} | {error, thrift_error()}.
deserialize(Type, Data) ->
{ok, Transport} = thrift_membuffer_transport:new(Data),
{ok, Proto} = new_protocol(Transport),
case thrift_protocol:read(Proto, Type) of
{_NewProto, {ok, Result}} ->
{ok, Result};
{_NewProto, {error, {thrift, {protocol, Reason}}}} ->
{error, {deserialization_failed, {thrift_protocol, Reason}}}
end.
%% Internals
-spec new_protocol(any()) -> term().
new_protocol(Transport) ->
thrift_binary_protocol:new(Transport, [{strict_read, true}, {strict_write, true}]).

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-module(lechiffre_tests_SUITE).
-include_lib("common_test/include/ct.hrl").
-include_lib("eunit/include/eunit.hrl").
-record('BankCard', {
token :: binary()
}).
-export([struct_info/1]).
-export([record_name/1]).
-export([all/0]).
-export([groups/0]).
-export([init_per_suite/1]).
-export([end_per_suite/1]).
-export([init_per_testcase/2]).
-export([end_per_testcase/2]).
-export([test/0]).
-export([
unknown_decrypt_key_test/1,
wrong_key_test/1,
wrong_encrypted_key_format_test/1,
encrypt_hide_secret_key_ok_test/1
]).
-type config() :: [{atom(), term()}].
-spec all() ->
[atom()].
all() ->
[
unknown_decrypt_key_test,
wrong_key_test,
wrong_encrypted_key_format_test,
encrypt_hide_secret_key_ok_test
].
-spec groups() ->
list().
groups() ->
[].
-spec test() ->
any().
test() ->
ok.
-spec init_per_suite(config()) ->
config().
init_per_suite(Config) ->
Config.
-spec end_per_suite(config()) ->
ok.
end_per_suite(_C) ->
ok.
-spec init_per_testcase(atom(), config()) ->
config().
init_per_testcase(_Name, C) ->
C.
-spec end_per_testcase(atom(), config()) ->
config().
end_per_testcase(_Name, _C) ->
ok.
-spec get_source(binary(), config()) ->
binary().
get_source(FileName, Config) ->
filename:join(?config(data_dir, Config), FileName).
%% TESTS
-spec encrypt_hide_secret_key_ok_test(config()) -> ok.
-spec unknown_decrypt_key_test(config()) -> ok.
-spec wrong_key_test(config()) -> ok.
-spec wrong_encrypted_key_format_test(config()) -> ok.
encrypt_hide_secret_key_ok_test(Config) ->
Filename = <<"secret_key_1.file">>,
Options = #{
encryption_key_path => {1, get_source(Filename, Config)},
decryption_key_path => #{
1 => get_source(Filename, Config)
}
},
lechiffre:start_link(Options),
{ThriftType, PaymentToolToken} = payment_tool_token(),
{ok, EncryptedToken} = lechiffre:encode(ThriftType, PaymentToolToken),
{ok, Value} = lechiffre:decode(ThriftType, EncryptedToken),
?assertEqual(PaymentToolToken, Value).
unknown_decrypt_key_test(_Config) ->
{ThriftType, PaymentToolToken} = payment_tool_token(),
Key = crypto:strong_rand_bytes(32),
SecretKey = #{
encryption_key => {1, Key},
decryption_key => #{2 => Key}
},
{ok, EncryptedToken} = lechiffre:encode(ThriftType, PaymentToolToken, SecretKey),
ErrorDecode = lechiffre:decode(ThriftType, EncryptedToken, SecretKey),
?assertEqual({error, {decryption_failed, {unknown_key_version, 1}}}, ErrorDecode).
wrong_key_test(_Config) ->
{ThriftType, PaymentToolToken} = payment_tool_token(),
Key = crypto:strong_rand_bytes(32),
WrongKey = crypto:strong_rand_bytes(32),
SecretKey = #{
encryption_key => {1, Key},
decryption_key => #{1 => WrongKey}
},
{ok, EncryptedToken} = lechiffre:encode(ThriftType, PaymentToolToken, SecretKey),
ErrorDecode = lechiffre:decode(ThriftType, EncryptedToken, SecretKey),
?assertEqual({error, {decryption_failed, decryption_validation_failed}}, ErrorDecode).
wrong_encrypted_key_format_test(_Config) ->
{ThriftType, PaymentToolToken} = payment_tool_token(),
Key = crypto:strong_rand_bytes(32),
WrongKey = crypto:strong_rand_bytes(32),
SecretKey = #{
encryption_key => {1, Key},
decryption_key => #{1 => WrongKey}
},
{ok, EncryptedToken} = lechiffre:encode(ThriftType, PaymentToolToken, SecretKey),
<<_Format:6/binary, Tail/binary>> = EncryptedToken,
BadEncryptedToken = <<"edf_v2", Tail/binary>>,
ErrorDecode = lechiffre:decode(ThriftType, BadEncryptedToken, SecretKey),
?assertEqual({error, {decryption_failed, bad_encrypted_data_format}}, ErrorDecode).
-spec payment_tool_token() -> {term(), term()}.
payment_tool_token() ->
Type = {struct, struct, {?MODULE, 'BankCard'}},
Token = #'BankCard'{
token = <<"TOKEN">>
},
{Type, Token}.
%% For Thrift compile
-type struct_flavour() :: struct | exception | union.
-type field_num() :: pos_integer().
-type field_name() :: atom().
-type field_req() :: required | optional | undefined.
-type type_ref() :: {module(), atom()}.
-type field_type() ::
bool | byte | i16 | i32 | i64 | string | double |
{enum, type_ref()} |
{struct, struct_flavour(), type_ref()} |
{list, field_type()} |
{set, field_type()} |
{map, field_type(), field_type()}.
-type struct_field_info() ::
{field_num(), field_req(), field_type(), field_name(), any()}.
-type struct_info() ::
{struct, struct_flavour(), [struct_field_info()]}.
-type struct_name() ::
'BankCard'.
-spec struct_info(struct_name()) -> struct_info() | no_return().
struct_info('BankCard') ->
{struct, struct, [
{1, required, string, 'token', undefined}
]};
struct_info(_) -> erlang:error(badarg).
-spec record_name(struct_name()) -> atom() | no_return().
record_name('BankCard') ->
'BankCard'.

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