63 lines
2.5 KiB
Erlang
63 lines
2.5 KiB
Erlang
%%%-------------------------------------------------------------------
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%%% @copyright (C) 2019, Aeternity Anstalt
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%%% @doc
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%%% Encode and decode data and function calls according to
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%%% Sophia-FATE-ABI
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%%% @end
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%%% Created : 11 Jun 2019
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%%%
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%%%-------------------------------------------------------------------
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-module(aeb_fate_abi).
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-export([ create_calldata/2
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, get_function_hash_from_calldata/1
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, get_function_name_from_function_hash/2
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, get_function_type_from_function_hash/2 ]).
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-include("../include/aeb_fate_data.hrl").
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%%%===================================================================
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%%% API
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%%%===================================================================
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-spec create_calldata(list(), [term()]) -> {ok, binary()}.
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create_calldata(FunName, Args) ->
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FunctionId = aeb_fate_code:symbol_identifier(list_to_binary(FunName)),
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{ok, aeb_fate_encoding:serialize(
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aeb_fate_data:make_tuple({FunctionId,
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aeb_fate_data:make_tuple(list_to_tuple(Args))}))}.
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-spec get_function_name_from_function_hash(binary(), aeb_fate_code:fcode()) ->
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{ok, term()} | {error, term()}.
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get_function_name_from_function_hash(<<SymbolHash:4/binary, _:28/binary>>, FateCode) ->
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get_function_name_from_function_hash(SymbolHash, FateCode);
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get_function_name_from_function_hash(SymbolHash = <<_:4/binary>>, FateCode) ->
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Symbols = aeb_fate_code:symbols(FateCode),
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case maps:get(SymbolHash, Symbols, undefined) of
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undefined -> {error, no_function_matching_function_hash};
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Function -> {ok, Function}
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end.
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-spec get_function_hash_from_calldata(binary()) ->
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{ok, binary()} | {error, term()}.
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get_function_hash_from_calldata(CallData) ->
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try ?FATE_TUPLE_ELEMENTS(aeb_fate_encoding:deserialize(CallData)) of
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[FunHash, _Args] -> {ok, FunHash};
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_ -> {error, bad_calldata}
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catch _:_ ->
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{error, bad_calldata}
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end.
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-spec get_function_type_from_function_hash(binary(), aeb_fate_code:fcode()) ->
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{ok, term()} | {error, term()}.
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get_function_type_from_function_hash(<<SymbolHash:4/binary, _:28/binary>>, FateCode) ->
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get_function_type_from_function_hash(SymbolHash, FateCode);
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get_function_type_from_function_hash(SymbolHash, FateCode) ->
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Functions = aeb_fate_code:functions(FateCode),
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case maps:get(SymbolHash, Functions, undefined) of
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undefined ->
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{error, no_function_matching_function_hash};
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{{ArgTypes, RetType}, _Code} ->
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{ok, ArgTypes, RetType}
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end.
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