feat(client): add get epoch info

client/rpc_get_epoch_info.go

@@ -0,0 +1,37 @@
+package client
+
+import (
+	"context"
+
+	"github.com/blocto/solana-go-sdk/rpc"
+)
+
+type GetEpochInfo struct {
+	AbsoluteSlot     uint64
+	BlockHeight      uint64
+	Epoch            uint64
+	SlotIndex        uint64
+	SlotsInEpoch     uint64
+	TransactionCount *uint64
+}
+
+// GetEpochInfo returns information about the current epoch
+func (c *Client) GetEpochInfo(ctx context.Context) (GetEpochInfo, error) {
+	return process(
+		func() (rpc.JsonRpcResponse[rpc.GetEpochInfo], error) {
+			return c.RpcClient.GetEpochInfo(ctx)
+		},
+		convertGetEpochInfo,
+	)
+}
+
+func convertGetEpochInfo(v rpc.GetEpochInfo) (GetEpochInfo, error) {
+	return GetEpochInfo{
+		AbsoluteSlot:     v.AbsoluteSlot,
+		BlockHeight:      v.BlockHeight,
+		Epoch:            v.Epoch,
+		SlotIndex:        v.SlotIndex,
+		SlotsInEpoch:     v.SlotsInEpoch,
+		TransactionCount: v.TransactionCount,
+	}, nil
+}

client/rpc_get_epoch_info_test.go

@@ -0,0 +1,34 @@
+package client
+
+import (
+	"context"
+	"testing"
+
+	"github.com/blocto/solana-go-sdk/internal/client_test"
+	"github.com/blocto/solana-go-sdk/pkg/pointer"
+)
+
+func TestClient_GetEpochInfo(t *testing.T) {
+	client_test.TestAll(
+		t,
+		[]client_test.Param{
+			{
+				RequestBody:  `{"jsonrpc":"2.0", "id":1, "method":"getEpochInfo"}`,
+				ResponseBody: `{"jsonrpc":"2.0","result":{"absoluteSlot":86715160,"blockHeight":84901536,"epoch":200,"slotIndex":315160,"slotsInEpoch":432000,"transactionCount":2265984079},"id":1}`,
+				F: func(url string) (any, error) {
+					c := NewClient(url)
+					return c.GetEpochInfo(context.TODO())
+				},
+				ExpectedValue: GetEpochInfo{
+					AbsoluteSlot:     86715160,
+					BlockHeight:      84901536,
+					Epoch:            200,
+					SlotIndex:        315160,
+					SlotsInEpoch:     432000,
+					TransactionCount: pointer.Get[uint64](2265984079),
+				},
+				ExpectedError: nil,
+			},
+		},
+	)
+}