clients/go: use existing RPC connection to retrieve calldata public key

.github/workflows/ci-test-go.yaml

@@ -0,0 +1,43 @@
+name: ci-test
+
+on:
+  push:
+    branches:
+      - main
+      - stable/*
+      - rc/*
+  pull_request:
+    branches:
+      - main
+      - stable/*
+      - rc/*
+
+jobs:
+  test-client-go:
+    name: test-client-go
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        working-directory: ./clients/go
+    services:
+      sapphire-localnet-ci:
+        image: ghcr.io/oasisprotocol/sapphire-localnet:latest
+        ports:
+          - 8545:8545
+          - 8546:8546
+        env:
+          OASIS_DEPOSIT_BINARY: /oasis-deposit -test-mnemonic -n 2
+        options: >-
+          --rm
+          --health-cmd="test -f /CONTAINER_READY"
+          --health-start-period=90s
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Go
+        uses: actions/setup-go@v5
+        with:
+          go-version: "1.22.x"
+
+      - name: Test
+        run: go test -v ./...

.github/workflows/ci-test.yaml

@@ -86,20 +86,3 @@ jobs:
 
       - name: Test JS client
         run: pnpm test:unit
-
-  test-client-go:
-    name: test-client-go
-    runs-on: ubuntu-latest
-    defaults:
-      run:
-        working-directory: ./clients/go
-    steps:
-      - uses: actions/checkout@v4
-
-      - name: Set up Go
-        uses: actions/setup-go@v5
-        with:
-          go-version: "1.22.x"
-
-      - name: Test
-        run: go test -v ./...

clients/go/cipher.go

@@ -1,16 +1,14 @@
 package sapphire
 
 import (
-	"bytes"
-	"context"
 	"crypto/cipher"
 	"crypto/rand"
 	"encoding/json"
 	"errors"
 	"fmt"
-	"net/http"
 
 	"github.com/ethereum/go-ethereum/common/hexutil"
+	"github.com/ethereum/go-ethereum/ethclient"
 
 	"github.com/oasisprotocol/curve25519-voi/primitives/x25519"
 	"github.com/oasisprotocol/deoxysii"
@@ -262,44 +260,17 @@ func (c X25519DeoxysIICipher) DecryptEncoded(response []byte) ([]byte, error) {
 }
 
 // GetRuntimePublicKey fetches the runtime calldata public key from the default Sapphire gateway.
-func GetRuntimePublicKey(chainID uint64) (*x25519.PublicKey, uint64, error) {
-	network, exists := Networks[chainID]
-	if !exists {
-		return nil, 0, fmt.Errorf("could not fetch public key for network with chain id %d", chainID)
-	}
-	request := Request{
-		Version: "2.0",
-		Method:  "oasis_callDataPublicKey",
-		ID:      1,
-	}
-	rawReq, _ := json.Marshal(request)
-
-	req, err := http.NewRequestWithContext(context.Background(), http.MethodPost, network.DefaultGateway, bytes.NewBuffer(rawReq))
-	if err != nil {
-		return nil, 0, fmt.Errorf("failed to create request for runtime calldata public key: %w", err)
-	}
-	req.Header.Set("Content-Type", "application/json")
-
-	client := http.Client{}
-	res, err := client.Do(req)
-	if err != nil {
-		return nil, 0, fmt.Errorf("failed to request runtime calldata public key: %w", err)
-	}
-
-	decoder := json.NewDecoder(res.Body)
-	rpcRes := new(Response)
-	if err := decoder.Decode(&rpcRes); err != nil {
-		return nil, 0, fmt.Errorf("unexpected response to request for runtime calldata public key: %w", err)
-	}
-	res.Body.Close()
-
+func GetRuntimePublicKey(c *ethclient.Client) (*x25519.PublicKey, uint64, error) {
 	var pubKey CallDataPublicKey
-	if err := json.Unmarshal(rpcRes.Result, &pubKey); err != nil {
+
+	if err := c.Client().Call(&pubKey, "oasis_callDataPublicKey"); err != nil {
 		return nil, 0, fmt.Errorf("invalid response when fetching runtime calldata public key: %w", err)
 	}
+
 	if len(pubKey.PublicKey) != x25519.PublicKeySize {
 		return nil, 0, fmt.Errorf("invalid public key length")
 	}
+
 	return (*x25519.PublicKey)(pubKey.PublicKey), pubKey.Epoch, nil
 }
 

clients/go/compat.go

@@ -129,8 +129,8 @@ type WrappedBackend struct {
 //
 // If you use cipher over a longer period of time, you should create a new
 // cipher instance every epoch to refresh the ParaTime's ephemeral key!
-func NewCipher(chainID uint64) (Cipher, error) {
-	runtimePublicKey, epoch, err := GetRuntimePublicKey(chainID)
+func NewCipher(c *ethclient.Client) (Cipher, error) {
+	runtimePublicKey, epoch, err := GetRuntimePublicKey(c)
 	if err != nil {
 		return nil, fmt.Errorf("failed to fetch runtime callata public key: %w", err)
 	}
@@ -151,7 +151,7 @@ func WrapClient(c *ethclient.Client, sign SignerFn) (*WrappedBackend, error) {
 	if err != nil {
 		return nil, fmt.Errorf("failed to fetch chain ID: %w", err)
 	}
-	cipher, err := NewCipher(chainID.Uint64())
+	cipher, err := NewCipher(c)
 	if err != nil {
 		return nil, err
 	}

clients/go/compat_test.go

@@ -1,18 +1,24 @@
 package sapphire
 
 import (
+	"context"
 	"encoding/base64"
 	"encoding/json"
+	"log"
 	"math/big"
 	"testing"
 
 	"github.com/ethereum/go-ethereum"
+	"github.com/ethereum/go-ethereum/accounts/abi/bind"
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/common/hexutil"
+	"github.com/ethereum/go-ethereum/core/types"
 	"github.com/ethereum/go-ethereum/crypto"
 
 	"github.com/oasisprotocol/oasis-core/go/common/cbor"
 	"github.com/oasisprotocol/oasis-sdk/client-sdk/go/modules/evm"
+
+	"github.com/ethereum/go-ethereum/ethclient"
 )
 
 func TestPackSignedCall(t *testing.T) {
@@ -89,3 +95,59 @@ func TestPackSignedCall(t *testing.T) {
 		t.Fatalf("err innerdata leash mismatch: expected %s got %s", leashOrig, leashDecoded)
 	}
 }
+
+func TestDial(t *testing.T) {
+	key, err := crypto.HexToECDSA("ac0974bec39a17e36ba4a6b4d238ff944bacb478cbed5efcae784d7bf4f2ff80")
+	if err != nil {
+		log.Fatal(err)
+	}
+	addr1 := crypto.PubkeyToAddress(key.PublicKey)
+
+	key2, err := crypto.GenerateKey()
+	if err != nil {
+		log.Fatal(err)
+	}
+	addr2 := crypto.PubkeyToAddress(key2.PublicKey)
+
+	SapphireChainID := uint64(0x5afd)
+	client, _ := ethclient.Dial(Networks[SapphireChainID].DefaultGateway)
+	backend, err := WrapClient(client, func(digest [32]byte) ([]byte, error) {
+		// Pass in a custom signing function to interact with the signer
+		return crypto.Sign(digest[:], key)
+	})
+	if err != nil {
+		t.Fatalf("failed to wrap client %v", err)
+	}
+
+	nonce, err := client.PendingNonceAt(context.Background(), addr1)
+	if err != nil {
+		t.Fatalf("failed to get pending nonce %v", err)
+	}
+
+	gasPrice, err := client.SuggestGasPrice(context.Background())
+	if err != nil {
+		t.Fatalf("failed to get gas price %v", err)
+	}
+
+	txOpts := backend.Transactor(addr1)
+
+	tx := types.NewTransaction(nonce, addr2, big.NewInt(1), uint64(100000), gasPrice, nil)
+	signedTx, err := txOpts.Signer(addr1, tx)
+	if err != nil {
+		t.Fatalf("failed to sign transaction %v", err)
+	}
+
+	err = client.SendTransaction(context.Background(), signedTx)
+	if err != nil {
+		t.Fatalf("failed to send transaction %v", err)
+	}
+
+	receipt, err := bind.WaitMined(context.Background(), client, signedTx)
+	if err != nil {
+		t.Fatalf("transaction failed! %v", err)
+	}
+
+	if receipt.Status != uint64(1) {
+		t.Fatalf("transaction failed! (status=%v)", receipt.Status)
+	}
+}