feat: exposed era in chainsync input

input/chainsync/block.go

@@ -22,6 +22,7 @@ type BlockContext struct {
 	BlockNumber  uint64 `json:"blockNumber"`
 	SlotNumber   uint64 `json:"slotNumber"`
 	NetworkMagic uint32 `json:"networkMagic"`
+	Era          string `json:"era"`
 }
 
 type BlockEvent struct {
@@ -38,6 +39,7 @@ func NewBlockContext(block ledger.Block, networkMagic uint32) BlockContext {
 		BlockNumber:  block.BlockNumber(),
 		SlotNumber:   block.SlotNumber(),
 		NetworkMagic: networkMagic,
+		Era:          block.Era().Name,
 	}
 	return ctx
 }
@@ -46,6 +48,7 @@ func NewBlockHeaderContext(block ledger.BlockHeader) BlockContext {
 	ctx := BlockContext{
 		BlockNumber: block.BlockNumber(),
 		SlotNumber:  block.SlotNumber(),
+		Era:         block.Era().Name,
 	}
 	return ctx
 }

input/chainsync/block_test.go

@@ -0,0 +1,253 @@
+package chainsync
+
+import (
+	"testing"
+
+	"github.com/blinklabs-io/gouroboros/ledger/common"
+	"github.com/stretchr/testify/assert"
+	utxorpc "github.com/utxorpc/go-codegen/utxorpc/v1alpha/cardano"
+)
+
+// MockIssuerVkey to implement IssuerVkey interface
+type MockIssuerVkey struct{}
+
+func (m MockIssuerVkey) Bytes() []byte {
+	return []byte{0x01, 0x02, 0x03}
+}
+
+func (m MockIssuerVkey) Hash() []byte {
+	return []byte{0x04, 0x05, 0x06}
+}
+
+// MockBlockHeader implements BlockHeader interface
+type MockBlockHeader struct {
+	hash          string
+	prevHash      string
+	blockNumber   uint64
+	slotNumber    uint64
+	issuerVkey    common.IssuerVkey
+	blockBodySize uint64
+	era           common.Era
+	cborBytes     []byte
+}
+
+func (m MockBlockHeader) Hash() string {
+	return m.hash
+}
+
+func (m MockBlockHeader) PrevHash() string {
+	return m.prevHash
+}
+
+func (m MockBlockHeader) BlockNumber() uint64 {
+	return m.blockNumber
+}
+
+func (m MockBlockHeader) SlotNumber() uint64 {
+	return m.slotNumber
+}
+
+func (m MockBlockHeader) IssuerVkey() common.IssuerVkey {
+	return m.issuerVkey
+}
+
+func (m MockBlockHeader) BlockBodySize() uint64 {
+	return m.blockBodySize
+}
+
+func (m MockBlockHeader) Era() common.Era {
+	return m.era
+}
+
+func (m MockBlockHeader) Cbor() []byte {
+	return m.cborBytes
+}
+
+// MockBlock implements Block interface
+type MockBlock struct {
+	MockBlockHeader
+	transactions []common.Transaction
+}
+
+func (m MockBlock) Header() common.BlockHeader {
+	return m.MockBlockHeader
+}
+
+func (m MockBlock) Type() int {
+	return 0
+}
+
+func (m MockBlock) Transactions() []common.Transaction {
+	return m.transactions
+}
+
+func (m MockBlock) Utxorpc() *utxorpc.Block {
+	return nil
+}
+
+func (m MockBlock) IsShelley() bool {
+	return m.era.Name == "Shelley"
+}
+
+func (m MockBlock) IsAllegra() bool {
+	return m.era.Name == "Allegra"
+}
+
+func (m MockBlock) IsMary() bool {
+	return m.era.Name == "Mary"
+}
+
+func (m MockBlock) IsAlonzo() bool {
+	return m.era.Name == "Alonzo"
+}
+
+func (m MockBlock) IsBabbage() bool {
+	return m.era.Name == "Babbage"
+}
+
+func (m MockBlock) IsConway() bool {
+	return m.era.Name == "Conway"
+}
+
+func TestNewBlockContext(t *testing.T) {
+	testCases := []struct {
+		name          string
+		block         MockBlock
+		networkMagic  uint32
+		expectedEra   string
+		expectedBlock uint64
+		expectedSlot  uint64
+	}{
+		{
+			name: "Shelley Era Block",
+			block: MockBlock{
+				MockBlockHeader: MockBlockHeader{
+					blockNumber: 1000,
+					slotNumber:  5000,
+					era: common.Era{
+						Name: "Shelley",
+					},
+					hash:          "sample-hash-shelley",
+					prevHash:      "prev-hash-shelley",
+					blockBodySize: 1024,
+					cborBytes:     []byte{0x01, 0x02, 0x03},
+				},
+				transactions: nil,
+			},
+			networkMagic:  764824073,
+			expectedEra:   "Shelley",
+			expectedBlock: 1000,
+			expectedSlot:  5000,
+		},
+		{
+			name: "Allegra Era Block",
+			block: MockBlock{
+				MockBlockHeader: MockBlockHeader{
+					blockNumber: 2500,
+					slotNumber:  10000,
+					era: common.Era{
+						Name: "Allegra",
+					},
+					hash:          "another-hash-allegra",
+					prevHash:      "prev-hash-allegra",
+					blockBodySize: 2048,
+					cborBytes:     []byte{0x04, 0x05, 0x06},
+				},
+				transactions: nil,
+			},
+			networkMagic:  1097911063,
+			expectedEra:   "Allegra",
+			expectedBlock: 2500,
+			expectedSlot:  10000,
+		},
+		{
+			name: "Mary Era Block",
+			block: MockBlock{
+				MockBlockHeader: MockBlockHeader{
+					blockNumber: 5000,
+					slotNumber:  25000,
+					era: common.Era{
+						Name: "Mary",
+					},
+					hash:          "mary-block-hash",
+					prevHash:      "prev-hash-mary",
+					blockBodySize: 4096,
+					cborBytes:     []byte{0x07, 0x08, 0x09},
+				},
+				transactions: nil,
+			},
+			networkMagic:  0,
+			expectedEra:   "Mary",
+			expectedBlock: 5000,
+			expectedSlot:  25000,
+		},
+	}
+
+	for _, tc := range testCases {
+		t.Run(tc.name, func(t *testing.T) {
+			blockContext := NewBlockContext(tc.block, tc.networkMagic)
+			assert.Equal(t, tc.expectedEra, blockContext.Era, "Era should match")
+			assert.Equal(t, tc.expectedBlock, blockContext.BlockNumber, "Block number should match")
+			assert.Equal(t, tc.expectedSlot, blockContext.SlotNumber, "Slot number should match")
+			assert.Equal(t, tc.networkMagic, blockContext.NetworkMagic, "Network magic should match")
+		})
+	}
+}
+
+func TestNewBlockContextEdgeCases(t *testing.T) {
+	testCases := []struct {
+		name         string
+		block        MockBlock
+		networkMagic uint32
+		expectedEra  string
+	}{
+		{
+			name: "Zero Values",
+			block: MockBlock{
+				MockBlockHeader: MockBlockHeader{
+					blockNumber: 0,
+					slotNumber:  0,
+					era: common.Era{
+						Name: "",
+					},
+					hash:          "",
+					prevHash:      "",
+					blockBodySize: 0,
+					cborBytes:     []byte{},
+				},
+				transactions: nil,
+			},
+			networkMagic: 0,
+			expectedEra:  "",
+		},
+		{
+			name: "Very Large Numbers",
+			block: MockBlock{
+				MockBlockHeader: MockBlockHeader{
+					blockNumber: ^uint64(0), // Max uint64 value
+					slotNumber:  ^uint64(0),
+					era: common.Era{
+						Name: "Alonzo",
+					},
+					hash:          "max-block-hash",
+					prevHash:      "max-prev-hash",
+					blockBodySize: ^uint64(0),
+					cborBytes:     []byte{0x0A, 0x0B, 0x0C},
+				},
+				transactions: nil,
+			},
+			networkMagic: ^uint32(0), // Max uint32 value
+			expectedEra:  "Alonzo",
+		},
+	}
+
+	for _, tc := range testCases {
+		t.Run(tc.name, func(t *testing.T) {
+			blockContext := NewBlockContext(tc.block, tc.networkMagic)
+			assert.Equal(t, tc.expectedEra, blockContext.Era, "Era should match")
+			assert.Equal(t, tc.block.BlockNumber(), blockContext.BlockNumber, "Block number should match")
+			assert.Equal(t, tc.block.SlotNumber(), blockContext.SlotNumber, "Slot number should match")
+			assert.Equal(t, tc.networkMagic, blockContext.NetworkMagic, "Network magic should match")
+		})
+	}
+}