ante: check that sender is a EOA (#125)

* ante: check that sender is a EOA

* fix: GetCodeSize handles nil case and comments

* docs: add TODO comment

* fix: use EmptyCodeHash check

* lint: evmtypes instead of types

* lint: fix suite error

* test: set code to act not as EOA

* undo comment on GetCodeSize

* keeper: fix input checks

* Apply suggestions from code review

Co-authored-by: Akash Khosla <me@akashkhosla.com>
Co-authored-by: Federico Kunze <31522760+fedekunze@users.noreply.github.com>

app/ante/eth_test.go

@@ -86,10 +86,23 @@ func (suite AnteTestSuite) TestNewEthAccountVerificationDecorator() {
 			true,
 			false,
 		},
+		{
+			"sender not EOA",
+			tx,
+			func() {
+				// set not as an EOA
+				suite.app.EvmKeeper.SetCode(addr, []byte("1"))
+			},
+			true,
+			false,
+		},
 		{
 			"not enough balance to cover tx cost",
 			tx,
-			func() {},
+			func() {
+				// reset back to EOA
+				suite.app.EvmKeeper.SetCode(addr, nil)
+			},
 			true,
 			false,
 		},