fix(rpc): different result from eth_getProof comparing with Ethereum (#1431)

* align with eth_getProof

for more info, see https://eips.ethereum.org/EIPS/eip-1186

* add GetHexProofs

* add change doc

* keep default res

* fix lint

* add e2e test

* Apply suggestions from code review

* fix lint

* nix run -f ./nix gomod2nix

CHANGELOG.md

@@ -77,6 +77,7 @@ Ref: https://keepachangelog.com/en/1.0.0/
 * (cli) [#1362](https://github.com/evmos/ethermint/pull/1362) Fix `index-eth-tx` error when the indexer db is empty.
 * (state) [#1320](https://github.com/evmos/ethermint/pull/1320) Fix codehash check mismatch when the code has been deleted in the evm state.
 * (rpc) [#1392](https://github.com/evmos/ethermint/pull/1392) Allow fill the proposer address in json-rpc through tendermint api, and pass explicitly to grpc query handler.
+* (rpc) [#1431](https://github.com/evmos/ethermint/pull/1431) Align hex-strings proof fields in `eth_getProof` as Ethereum.
 
 ## [v0.19.3] - 2022-10-14
 

gomod2nix.toml

@@ -362,8 +362,8 @@ schema = 3
     version = "v2.4.0"
     hash = "sha256-Z+bch118Akc5wGkOM7ZePNqw7vW5euXE7ec4Y297HNw="
   [mod."github.com/onsi/gomega"]
-    version = "v1.23.0"
+    version = "v1.24.0"
-    hash = "sha256-g5FaFLUK8ZAR9VgFTTH0ax0t45tZkYbIHbq/gANIOTM="
+    hash = "sha256-pOth47IZsI9c16TKLqW8HMObd1KiqWbe0iem+ue4bTw="
   [mod."github.com/pelletier/go-toml"]
     version = "v1.9.5"
     hash = "sha256-RJ9K1BTId0Mled7S66iGgxHkZ5JKEIsrrNaEfM8aImc="

rpc/backend/account_info.go

@@ -75,16 +75,10 @@ func (b *Backend) GetProof(address common.Address, storageKeys []string, blockNr
 			return nil, err
 		}
 
-		// check for proof
-		var proofStr string
-		if proof != nil {
-			proofStr = proof.String()
-		}
-
 		storageProofs[i] = rpctypes.StorageResult{
 			Key:   key,
 			Value: (*hexutil.Big)(new(big.Int).SetBytes(valueBz)),
-			Proof: []string{proofStr},
+			Proof: GetHexProofs(proof),
 		}
 	}
 
@@ -105,12 +99,6 @@ func (b *Backend) GetProof(address common.Address, storageKeys []string, blockNr
 		return nil, err
 	}
 
-	// check for proof
-	var accProofStr string
-	if proof != nil {
-		accProofStr = proof.String()
-	}
-
 	balance, ok := sdkmath.NewIntFromString(res.Balance)
 	if !ok {
 		return nil, errors.New("invalid balance")
@@ -118,7 +106,7 @@ func (b *Backend) GetProof(address common.Address, storageKeys []string, blockNr
 
 	return &rpctypes.AccountResult{
 		Address:      address,
-		AccountProof: []string{accProofStr},
+		AccountProof: GetHexProofs(proof),
 		Balance:      (*hexutil.Big)(balance.BigInt()),
 		CodeHash:     common.HexToHash(res.CodeHash),
 		Nonce:        hexutil.Uint64(res.Nonce),

rpc/backend/utils.go

@@ -21,6 +21,7 @@ import (
 
 	"github.com/evmos/ethermint/rpc/types"
 	evmtypes "github.com/evmos/ethermint/x/evm/types"
+	"github.com/tendermint/tendermint/proto/tendermint/crypto"
 )
 
 type txGasAndReward struct {
@@ -263,3 +264,20 @@ func GetLogsFromBlockResults(blockRes *tmrpctypes.ResultBlockResults) ([][]*etht
 
 	return blockLogs, nil
 }
+
+// GetHexProofs returns list of hex data of proof op
+func GetHexProofs(proof *crypto.ProofOps) []string {
+	if proof == nil {
+		return []string{""}
+	}
+	proofs := []string{}
+	// check for proof
+	for _, p := range proof.Ops {
+		proof := ""
+		if len(p.Data) > 0 {
+			proof = hexutil.Encode(p.Data)
+		}
+		proofs = append(proofs, proof)
+	}
+	return proofs
+}

rpc/backend/utils_test.go

@@ -0,0 +1,52 @@
+package backend
+
+import (
+	"fmt"
+
+	"github.com/tendermint/tendermint/proto/tendermint/crypto"
+)
+
+func mookProofs(num int, withData bool) *crypto.ProofOps {
+	var proofOps *crypto.ProofOps
+	if num > 0 {
+		proofOps = new(crypto.ProofOps)
+		for i := 0; i < num; i++ {
+			proof := crypto.ProofOp{}
+			if withData {
+				proof.Data = []byte("\n\031\n\003KEY\022\005VALUE\032\013\010\001\030\001 \001*\003\000\002\002")
+			}
+			proofOps.Ops = append(proofOps.Ops, proof)
+		}
+	}
+	return proofOps
+}
+
+func (suite *BackendTestSuite) TestGetHexProofs() {
+	defaultRes := []string{""}
+	testCases := []struct {
+		name  string
+		proof *crypto.ProofOps
+		exp   []string
+	}{
+		{
+			"no proof provided",
+			mookProofs(0, false),
+			defaultRes,
+		},
+		{
+			"no proof data provided",
+			mookProofs(1, false),
+			defaultRes,
+		},
+		{
+			"valid proof provided",
+			mookProofs(1, true),
+			[]string{"0x0a190a034b4559120556414c55451a0b0801180120012a03000202"},
+		},
+	}
+	for _, tc := range testCases {
+		suite.Run(fmt.Sprintf("Case %s", tc.name), func() {
+			suite.Require().Equal(tc.exp, GetHexProofs(tc.proof))
+		})
+	}
+}

tests/integration_tests/expected_constants.py

@@ -26,6 +26,16 @@ EXPECTED_GET_PROOF = {
     ],
 }
 
+EXPECTED_ACCOUNT_PROOF = [
+    "0x0ac1030a150157f96e6b86cdefdb3d412547816a82e3e0ebf9d212e8010a1e2f65746865726d696e742e74797065732e76312e4574684163636f756e7412c5010a7f0a2a63726331326c756b75367578656868616b303270793472637a36357a753073776837776a737277307070124f0a282f65746865726d696e742e63727970746f2e76312e657468736563703235366b312e5075624b657912230a21026e710a62a342de0ed4d7c4532dcbcbbafbf19652ed67b237efab70e8b207efac200112423078633564323436303138366637323333633932376537646232646363373033633065353030623635336361383232373362376266616438303435643835613437301a0b0801180120012a03000202222b08011204020402201a2120e2a580b805b8b4d1f80793092cefe57965d9582ba8e31505a72cf31a55fa173d222b08011204040802201a21206c0bd60f0d887a5f99dd023f133dfd12412b074c0c442ab8a25b17048ff34ae022290801122506100220a66ec49c8058aef1eabb21a9610e16227d95982482db0ab5b032f823d457c2b920222b080112040a2e02201a2120af3944b847407590f1b2a95edcd1c2c5408e27a404e0b22267bcc2d46df700ed",  # noqa: E501
+    "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",  # noqa: E501
+]
+
+EXPECTED_STORAGE_PROOF = [
+    "0x12370a350257f96e6b86cdefdb3d412547816a82e3e0ebf9d20000000000000000000000000000000000000000000000000000000000000000",  # noqa: E501
+    "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",  # noqa: E501
+]
+
 EXPECTED_GET_TRANSACTION = {
     "jsonrpc": "2.0",
     "id": 0,

tests/integration_tests/test_types.py

@@ -1,11 +1,13 @@
 from web3 import Web3
 
 from .expected_constants import (
+    EXPECTED_ACCOUNT_PROOF,
     EXPECTED_FEE_HISTORY,
     EXPECTED_GET_PROOF,
     EXPECTED_GET_STORAGE_AT,
     EXPECTED_GET_TRANSACTION,
     EXPECTED_GET_TRANSACTION_RECEIPT,
+    EXPECTED_STORAGE_PROOF,
 )
 from .utils import (
     ADDRS,
@@ -181,11 +183,15 @@ def test_get_storage_at(ethermint_rpc_ws, geth):
     assert res, err
 
 
-def send_and_get_hash(w3, tx_value=10):
+def send_tnx(w3, tx_value=10):
     # Do an ethereum transfer
     gas_price = w3.eth.gas_price
     tx = {"to": ADDRS["community"], "value": tx_value, "gasPrice": gas_price}
-    return send_transaction(w3, tx, KEYS["validator"])["transactionHash"].hex()
+    return send_transaction(w3, tx, KEYS["validator"])
+
+
+def send_and_get_hash(w3, tx_value=10):
+    return send_tnx(w3, tx_value)["transactionHash"].hex()
 
 
 def test_get_proof(ethermint_rpc_ws, geth):
@@ -195,26 +201,29 @@ def test_get_proof(ethermint_rpc_ws, geth):
     eth_rpc = w3.provider
     w3_wait_for_block(w3, 3)
     geth_rpc = geth.w3.provider
-    make_same_rpc_calls(
+    validator = ADDRS["validator"]
+    method = "eth_getProof"
+    for quantity in ["latest", "0x1024"]:
+        res = make_same_rpc_calls(
             eth_rpc,
             geth_rpc,
-        "eth_getProof",
+            method,
-        ["0x57f96e6b86cdefdb3d412547816a82e3e0ebf9d2", ["0x0"], "latest"],
+            [validator, ["0x0"], quantity],
         )
+    res = send_tnx(w3)
 
-    make_same_rpc_calls(
+    proof = (eth_rpc.make_request(
-        eth_rpc,
+        method, [validator, ["0x0"], hex(res["blockNumber"])]
-        geth_rpc,
+    ))["result"]
-        "eth_getProof",
+    res, err = same_types(proof, EXPECTED_GET_PROOF)
-        ["0x57f96e6b86cdefdb3d412547816a82e3e0ebf9d2", ["0x0"], "0x1024"],
+    assert res, err
-    )
+    assert proof["accountProof"], EXPECTED_ACCOUNT_PROOF
+    assert proof["storageProof"][0]["proof"], EXPECTED_STORAGE_PROOF
 
-    _ = send_and_get_hash(w3)
+    proof = (geth_rpc.make_request(
-
+        method, [validator, ["0x0"], "latest"]
-    proof = eth_rpc.make_request(
+    ))["result"]
-        "eth_getProof", [ADDRS["validator"], ["0x0"], "latest"]
+    res, err = same_types(proof, EXPECTED_GET_PROOF)
-    )
-    res, err = same_types(proof["result"], EXPECTED_GET_PROOF)
     assert res, err