add pending transactions for geth

apps/ethereum_jsonrpc/lib/ethereum_jsonrpc/geth.ex

@@ -5,7 +5,7 @@ defmodule EthereumJSONRPC.Geth do
 
   import EthereumJSONRPC, only: [id_to_params: 1, integer_to_quantity: 1, json_rpc: 2, request: 1]
 
-  alias EthereumJSONRPC.{FetchedBalance, FetchedCode}
+  alias EthereumJSONRPC.{FetchedBalance, FetchedCode, Transactions}
   alias EthereumJSONRPC.Geth.{Calls, Tracer}
 
   @behaviour EthereumJSONRPC.Variant
@@ -46,12 +46,31 @@ defmodule EthereumJSONRPC.Geth do
   def fetch_block_internal_transactions(_block_range, _json_rpc_named_arguments), do: :ignore
 
   @doc """
-  Pending transaction fetching is not supported currently for Geth.
+  Fetches the pending transactions from the Geth node.
-
-  To signal to the caller that fetching is not supported, `:ignore` is returned.
   """
   @impl EthereumJSONRPC.Variant
-  def fetch_pending_transactions(_json_rpc_named_arguments), do: :ignore
+  def fetch_pending_transactions(json_rpc_named_arguments) do
+    with {:ok, transaction_data} <-
+           %{id: 1, method: "txpool_content", params: []} |> request() |> json_rpc(json_rpc_named_arguments) do
+      transactions_params =
+        transaction_data["pending"]
+        |> Enum.flat_map(fn {_address, nonce_transactions_map} ->
+          nonce_transactions_map
+          |> Enum.map(fn {_nonce, transaction} ->
+            transaction
+          end)
+        end)
+        |> Transactions.to_elixir()
+        |> Transactions.elixir_to_params()
+        |> Enum.map(fn params ->
+          # txpool_content always returns transaction with 0x0000000000000000000000000000000000000000000000000000000000000000 value in block hash.
+          # https://github.com/ethereum/go-ethereum/issues/19897
+          %{params | block_hash: nil}
+        end)
+
+      {:ok, transactions_params}
+    end
+  end
 
   defp debug_trace_transaction_requests(id_to_params) when is_map(id_to_params) do
     Enum.map(id_to_params, fn {id, %{hash_data: hash_data}} ->

apps/ethereum_jsonrpc/test/ethereum_jsonrpc/geth_test.exs

@@ -84,8 +84,132 @@ defmodule EthereumJSONRPC.GethTest do
   end
 
   describe "fetch_pending_transactions/1" do
-    test "is not supported", %{json_rpc_named_arguments: json_rpc_named_arguments} do
+    test "fetches pending transactions", %{json_rpc_named_arguments: json_rpc_named_arguments} do
-      EthereumJSONRPC.Geth.fetch_pending_transactions(json_rpc_named_arguments)
+      expect(EthereumJSONRPC.Mox, :json_rpc, fn _, _ ->
+        {:ok,
+         %{
+           "pending" => %{
+             "0xC99f4e9cFf697ca6717ad9cE8bA4A138e0e55109" => %{
+               "4656" => %{
+                 "blockHash" => "0x0000000000000000000000000000000000000000000000000000000000000000",
+                 "blockNumber" => nil,
+                 "from" => "0xc99f4e9cff697ca6717ad9ce8ba4a138e0e55109",
+                 "gas" => "0x3d0900",
+                 "gasPrice" => "0x3b9aca00",
+                 "hash" => "0x2b8cfd76a31b942e51b6265c791c860e2840b11f8c2fcfa1c9dfe53dea4c3102",
+                 "input" =>
+                   "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",
+                 "nonce" => "0x1230",
+                 "r" => "0x81345ae149171f4cb4ab868f0ad637d033c96c4659b190b86a39725c8299c947",
+                 "s" => "0x31450678841d7206fa02b564a641420262cc98c8ea0e32c4cb0e97208d3f9feb",
+                 "to" => "0xf003a84d6890202663c0fd80954e836fcf21e004",
+                 "transactionIndex" => "0x0",
+                 "v" => "0x1b",
+                 "value" => "0xb5e620f480000"
+               },
+               "4657" => %{
+                 "blockHash" => "0x0000000000000000000000000000000000000000000000000000000000000000",
+                 "blockNumber" => nil,
+                 "from" => "0xc99f4e9cff697ca6717ad9ce8ba4a138e0e55109",
+                 "gas" => "0x3d0900",
+                 "gasPrice" => "0x3b9aca00",
+                 "hash" => "0x7c3ea924740e996bf552a8dded903ba4258b69d30bf5e6dca6ec86ebc60b8151",
+                 "input" =>
+                   "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",
+                 "nonce" => "0x1231",
+                 "r" => "0xee1eb895262d12ef5c4ee3cbf9b36de3903bc3a1343f0a312bd19edacc4bb877",
+                 "s" => "0xfcb87efe4c3984a3e1d3f4fb10ce41e59f65e21fbd9206a1648ec73fa0a2206",
+                 "to" => "0xf003a84d6890202663c0fd80954e836fcf21e004",
+                 "transactionIndex" => "0x0",
+                 "v" => "0x1b",
+                 "value" => "0xb5e620f480000"
+               },
+               "4658" => %{
+                 "blockHash" => "0x0000000000000000000000000000000000000000000000000000000000000000",
+                 "blockNumber" => nil,
+                 "from" => "0xc99f4e9cff697ca6717ad9ce8ba4a138e0e55109",
+                 "gas" => "0x3d0900",
+                 "gasPrice" => "0x3b9aca00",
+                 "hash" => "0xe699a58ef4986f2dbdc102acf73b35392aff9ce43fd226000526955e19c0b06e",
+                 "input" =>
+                   "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",
+                 "nonce" => "0x1232",
+                 "r" => "0xe95bc86fc32cc591677c7ec9ca49f1dc33a31427235c1c41dbb7a3a957b55599",
+                 "s" => "0xe8b41a6440d0fe6d0ec1f40982394a2d641b19b983aad49e45614e5f3a1abc9",
+                 "to" => "0xf003a84d6890202663c0fd80954e836fcf21e004",
+                 "transactionIndex" => "0x0",
+                 "v" => "0x1c",
+                 "value" => "0xb5e620f480000"
+               }
+             }
+           },
+           "queued" => %{}
+         }}
+      end)
+
+      assert {:ok,
+              [
+                %{
+                  block_hash: nil,
+                  block_number: nil,
+                  from_address_hash: "0xc99f4e9cff697ca6717ad9ce8ba4a138e0e55109",
+                  gas: 4_000_000,
+                  gas_price: 1_000_000_000,
+                  hash: "0x2b8cfd76a31b942e51b6265c791c860e2840b11f8c2fcfa1c9dfe53dea4c3102",
+                  index: 0,
+                  input:
+                    "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",
+                  nonce: 4656,
+                  r:
+                    58_440_860_745_466_360_584_510_362_592_650_991_653_332_571_230_597_223_185_413_246_840_900_756_818_247,
+                  s:
+                    22_285_286_687_634_777_993_513_656_263_235_057_426_117_768_584_265_280_722_872_863_042_386_096_267_243,
+                  to_address_hash: "0xf003a84d6890202663c0fd80954e836fcf21e004",
+                  transaction_index: 0,
+                  v: 27,
+                  value: 3_200_000_000_000_000
+                },
+                %{
+                  block_hash: nil,
+                  block_number: nil,
+                  from_address_hash: "0xc99f4e9cff697ca6717ad9ce8ba4a138e0e55109",
+                  gas: 4_000_000,
+                  gas_price: 1_000_000_000,
+                  hash: "0x7c3ea924740e996bf552a8dded903ba4258b69d30bf5e6dca6ec86ebc60b8151",
+                  index: 0,
+                  input:
+                    "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",
+                  nonce: 4657,
+                  r:
+                    107_704_737_317_141_024_268_971_404_113_297_355_261_066_880_504_936_960_891_977_784_149_226_505_877_623,
+                  s:
+                    7_144_300_886_174_743_587_831_226_472_052_852_957_529_607_874_128_062_849_708_955_356_153_894_281_734,
+                  to_address_hash: "0xf003a84d6890202663c0fd80954e836fcf21e004",
+                  transaction_index: 0,
+                  v: 27,
+                  value: 3_200_000_000_000_000
+                },
+                %{
+                  block_hash: nil,
+                  block_number: nil,
+                  from_address_hash: "0xc99f4e9cff697ca6717ad9ce8ba4a138e0e55109",
+                  gas: 4_000_000,
+                  gas_price: 1_000_000_000,
+                  hash: "0xe699a58ef4986f2dbdc102acf73b35392aff9ce43fd226000526955e19c0b06e",
+                  index: 0,
+                  input:
+                    "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",
+                  nonce: 4658,
+                  r:
+                    105_551_060_165_173_654_536_466_245_809_705_255_348_773_503_447_188_823_324_699_103_004_494_755_354_009,
+                  s:
+                    6_578_424_718_200_222_268_891_012_570_118_685_130_111_416_504_340_507_122_286_266_818_507_627_932_617,
+                  to_address_hash: "0xf003a84d6890202663c0fd80954e836fcf21e004",
+                  transaction_index: 0,
+                  v: 28,
+                  value: 3_200_000_000_000_000
+                }
+              ]} = Geth.fetch_pending_transactions(json_rpc_named_arguments)
     end
   end
 end