eth/abi: implement packed encoder

lib/eth/abi.rb

@@ -123,6 +123,8 @@ def decode(types, data)
   end
 end
 
+require "eth/abi/packed/decoder"
+require "eth/abi/packed/encoder"
 require "eth/abi/decoder"
 require "eth/abi/encoder"
 require "eth/abi/event"

lib/eth/abi/packed/decoder.rb

@@ -0,0 +1,29 @@
+# Copyright (c) 2016-2023 The Ruby-Eth Contributors
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# -*- encoding : ascii-8bit -*-
+
+# Provides the {Eth} module.
+module Eth
+
+  # Provides a Ruby implementation of the Ethereum Application Binary Interface (ABI).
+  module Abi
+    module Packed
+
+      # Provides a utility module to assist decoding ABIs.
+      module Decoder
+      end
+    end
+  end
+end

lib/eth/abi/packed/encoder.rb

@@ -0,0 +1,29 @@
+# Copyright (c) 2016-2023 The Ruby-Eth Contributors
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# -*- encoding : ascii-8bit -*-
+
+# Provides the {Eth} module.
+module Eth
+
+  # Provides a Ruby implementation of the Ethereum Application Binary Interface (ABI).
+  module Abi
+    module Packed
+
+      # Provides a utility module to assist encoding ABIs.
+      module Encoder
+      end
+    end
+  end
+end

spec/eth/abi/packed/decoder_spec.rb

@@ -0,0 +1,6 @@
+# -*- encoding : ascii-8bit -*-
+
+require "spec_helper"
+
+describe Abi::Packed::Decoder do
+end

spec/eth/abi/packed/encoder_spec.rb

@@ -0,0 +1,6 @@
+# -*- encoding : ascii-8bit -*-
+
+require "spec_helper"
+
+describe Abi::Packed::Encoder do
+end