fix: align empty account result for old blocks as ethereum

CHANGELOG.md

@@ -92,6 +92,8 @@ Ref: https://keepachangelog.com/en/1.0.0/
 * (proto) [#1466](https://github.com/evmos/ethermint/pull/1466) Fix proto scripts and upgrade them to mirror current cosmos-sdk scripts
 * (rpc) [#1405](https://github.com/evmos/ethermint/pull/1405) Fix uninitialized chain ID field in gRPC requests.
 * (analytics) [#1434](https://github.com/evmos/ethermint/pull/1434) Remove unbound labels from custom tendermint metrics.
+* (rpc) [#1484](https://github.com/evmos/ethermint/pull/1484) Align empty account result for old blocks as ethereum instead of return account not found error.
+
 
 ## [v0.19.3] - 2022-10-14
 

gomod2nix.toml

@@ -97,8 +97,8 @@ schema = 3
     version = "v1.0.0-alpha8"
     hash = "sha256-iXzXoS5Kfh5DBy+PhdFWraDWXda/3M4j7j4VECjv4CA="
   [mod."github.com/cosmos/cosmos-sdk"]
-    version = "v0.46.5-0.20221114064055-2114ec42dfa1"
-    hash = "sha256-swqznmZfl2dlj/8ReJJs0zagFN2xpzF2ehsfVvPbohc="
+    version = "v0.46.6"
+    hash = "sha256-H1VZxZUWXhpXiY3A9smLp09MEGpXmh+XvX6YUiXPcpQ="
   [mod."github.com/cosmos/go-bip39"]
     version = "v1.0.0"
     hash = "sha256-Qm2aC2vaS8tjtMUbHmlBSagOSqbduEEDwc51qvQaBmA="

rpc/backend/utils.go

@@ -10,6 +10,8 @@ import (
 
 	sdk "github.com/cosmos/cosmos-sdk/types"
 	authtypes "github.com/cosmos/cosmos-sdk/x/auth/types"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/status"
 
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/common/hexutil"
@@ -46,8 +48,15 @@ func (s sortGasAndReward) Less(i, j int) bool {
 // Todo: include the ability to specify a blockNumber
 func (b *Backend) getAccountNonce(accAddr common.Address, pending bool, height int64, logger log.Logger) (uint64, error) {
 	queryClient := authtypes.NewQueryClient(b.clientCtx)
-	res, err := queryClient.Account(types.ContextWithHeight(height), &authtypes.QueryAccountRequest{Address: sdk.AccAddress(accAddr.Bytes()).String()})
+	adr := sdk.AccAddress(accAddr.Bytes()).String()
+	ctx := types.ContextWithHeight(height)
+	res, err := queryClient.Account(ctx, &authtypes.QueryAccountRequest{Address: adr})
 	if err != nil {
+		st, ok := status.FromError(err)
+		// treat as account doesn't exist yet
+		if ok && st.Code() == codes.NotFound {
+			err = nil
+		}
 		return 0, err
 	}
 	var acc authtypes.AccountI

tests/integration_tests/test_account.py

@@ -0,0 +1,31 @@
+import os
+
+from eth_account import Account
+
+from .utils import ADDRS, w3_wait_for_new_blocks
+
+
+def test_get_transaction_count(ethermint):
+    w3 = ethermint.w3
+    blk = hex(w3.eth.block_number)
+    sender = ADDRS["validator"]
+
+    # derive a new address
+    account_path = "m/44'/60'/0'/0/1"
+    mnemonic = os.getenv("COMMUNITY_MNEMONIC")
+    receiver = (Account.from_mnemonic(mnemonic, account_path=account_path)).address
+    n0 = w3.eth.get_transaction_count(receiver, blk)
+    # ensure tnx send in new block
+    w3_wait_for_new_blocks(w3, 1, sleep=0.1)
+    txhash = w3.eth.send_transaction(
+        {
+            "from": sender,
+            "to": receiver,
+            "value": 1000,
+        }
+    )
+    receipt = w3.eth.wait_for_transaction_receipt(txhash)
+    assert receipt.status == 1
+    [n1, n2] = [w3.eth.get_transaction_count(receiver, b) for b in [blk, "latest"]]
+    assert n0 == n1
+    assert n0 == n2

tests/integration_tests/utils.py

@@ -63,10 +63,10 @@ def wait_for_port(port, host="127.0.0.1", timeout=40.0):
                 ) from ex
 
 
-def w3_wait_for_new_blocks(w3, n):
+def w3_wait_for_new_blocks(w3, n, sleep=0.5):
     begin_height = w3.eth.block_number
     while True:
-        time.sleep(0.5)
+        time.sleep(sleep)
         cur_height = w3.eth.block_number
         if cur_height - begin_height >= n:
             break