Electrum integration tests for mainnet servers (#3599)

In this PR we implement support for mainnet servers in the electrum
client integration tests.

We also include the embedded electrum servers in the verification.

To run the tests execute:
```sh
go test -v -tags=integration ./pkg/bitcoin/electrum -count=1
```

Closes: #3594

.github/workflows/client.yml

@@ -323,4 +323,4 @@ jobs:
           docker run \
             --workdir /go/src/github.com/keep-network/keep-core \
             go-build-env \
-            gotestsum -- -tags=integration ./...
+            gotestsum -- -timeout 20m -tags=integration ./...

Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.18.3-alpine3.16 AS build-sources
+FROM golang:1.18.10-alpine3.16 AS build-sources
 
 ENV GOPATH=/go \
 	GOBIN=/go/bin \

internal/testdata/bitcoin/block.go

@@ -0,0 +1,32 @@
+package bitcoin
+
+import "github.com/keep-network/keep-core/pkg/bitcoin"
+
+// Blocks holds details of block header data used as test vectors.
+var Blocks = map[bitcoin.Network]struct {
+	BlockHeight uint
+	BlockHeader *bitcoin.BlockHeader
+}{
+	bitcoin.Testnet: {
+		BlockHeight: 2135502,
+		BlockHeader: &bitcoin.BlockHeader{
+			Version:                 536870916,
+			PreviousBlockHeaderHash: hashFromString("000000000066450030efdf72f233ed2495547a32295deea1e2f3a16b1e50a3a5"),
+			MerkleRootHash:          hashFromString("1251774996b446f85462d5433f7a3e384ac1569072e617ab31e86da31c247de2"),
+			Time:                    1641914003,
+			Bits:                    436256810,
+			Nonce:                   778087099,
+		},
+	},
+	bitcoin.Mainnet: {
+		BlockHeight: 792379,
+		BlockHeader: &bitcoin.BlockHeader{
+			Version:                 547356672,
+			PreviousBlockHeaderHash: hashFromString("000000000000000000035d7345203315d8c73c37da256eebbe58a683331b60f5"),
+			MerkleRootHash:          hashFromString("a406a1495c4c4bed2d458f06f393cb841a545cbf7cc04b1ee3d9ae9e6eccb402"),
+			Time:                    1685622977,
+			Bits:                    386236009,
+			Nonce:                   2812580720,
+		},
+	},
+}

internal/testdata/bitcoin/merkleproof.go

@@ -0,0 +1,56 @@
+package bitcoin
+
+import "github.com/keep-network/keep-core/pkg/bitcoin"
+
+// TxMerkleProofs holds details of transaction merkle proof data used as test vectors.
+var TxMerkleProofs = map[bitcoin.Network]struct {
+	TxHash      bitcoin.Hash
+	BlockHeight uint
+	MerkleProof *bitcoin.TransactionMerkleProof
+}{
+	bitcoin.Testnet: {
+		TxHash: hashFromString(
+			"72e7fd57c2adb1ed2305c4247486ff79aec363296f02ec65be141904f80d214e",
+		),
+		BlockHeight: 1569342,
+		MerkleProof: &bitcoin.TransactionMerkleProof{
+			BlockHeight: 1569342,
+			MerkleNodes: []string{
+				"8b5bbb5bdf6727bf70fad4f46fe4eaab04c98119ffbd2d95c29adf32d26f8452",
+				"53637bacb07965e4a8220836861d1b16c6da29f10ea9ab53fc4eca73074f98b9",
+				"0267e738108d094ceb05217e2942e9c2a4c6389ac47f476f572c9a319ce4dfbc",
+				"34e00deec50c48d99678ca2b52b82d6d5432326159c69e7233d0dde0924874b4",
+				"7a53435e6c86a3620cdbae510901f17958f0540314214379197874ed8ed7a913",
+				"6315dbb7ce350ceaa16cd4c35c5a147005e8b38ca1e9531bd7320629e8d17f5b",
+				"40380cdadc0206646208871e952af9dcfdff2f104305ce463aed5eeaf7725d2f",
+				"5d74bae6a71fd1cff2416865460583319a40343650bd4bb89de0a6ae82097037",
+				"296ddccfc659e0009aad117c8ed15fb6ff81c2bade73fbc89666a22708d233f9",
+			},
+			Position: 176,
+		},
+	},
+	bitcoin.Mainnet: {
+		TxHash: hashFromString(
+			"c11feea0f8b9e256e0a70ad58f88c7e3800d8ffbfb85edf7169629584a97a7ab",
+		),
+		BlockHeight: 793508,
+		MerkleProof: &bitcoin.TransactionMerkleProof{
+			BlockHeight: 793508,
+			MerkleNodes: []string{
+				"557900a6e94e751da2de3cc4c322a12d682b0285996187b4276c8c1936940efe",
+				"910ae74a83dda3faa97dff964eac4d4102119161f8c850c578afff33a5e43c33",
+				"0d3648b1fba7f375b54a268644e0f6f7f739a490156752916312dc945b3c5a5d",
+				"8d19e661f8b3bfdb1d4228a5f8aa855808ef5a0a5ffa65e32551c8f3599ff01b",
+				"ea1bbd7e974a8455f38bb4c047b2324fa62df49dc486018f3604c02a71473261",
+				"b315a3bb6dfc35e53eaf8756214a521ece6b7c5323d7ed616e6e828de6d024e2",
+				"d7272801d3f9d8dd459451cdf066cf4fab03cc2198391213e22f49b5a5563c2e",
+				"baf373eb68aa0fece7e680d09183d7b441073a5b0745bbad92345fdd0447badb",
+				"016c2eb0e2be1cdbed723690e6de31030a03bece34edf6944ba5d55ab64fa305",
+				"dc74dc3b4b84293cce52b9d739ca29501e612ceb566ea391a5fde1341d46c950",
+				"9c941fd7c44fc29403865d57b78941664a236f8506b7a8676d1a833eeea16ff3",
+				"6ad9f32a66f3d376ea4bcc48d807f565e8b5228cf5b45eefb42879c270263d2d",
+			},
+			Position: 227,
+		},
+	},
+}