Add ILogpoller interface and call NewLogPoller() from NewChain()

Note: this will hopefully be renamed to LogPoller later, once we
find a better name for the struct. (logPoller, for consistency with evm?)
and the PR's this depends on have been merged, to avoid merge conflicts

pkg/solana/chain.go

@@ -28,6 +28,7 @@ import (
 	mn "github.com/smartcontractkit/chainlink-solana/pkg/solana/client/multinode"
 	"github.com/smartcontractkit/chainlink-solana/pkg/solana/config"
 	"github.com/smartcontractkit/chainlink-solana/pkg/solana/internal"
+	"github.com/smartcontractkit/chainlink-solana/pkg/solana/logpoller"
 	"github.com/smartcontractkit/chainlink-solana/pkg/solana/monitor"
 	"github.com/smartcontractkit/chainlink-solana/pkg/solana/txm"
 )
@@ -37,6 +38,7 @@ type Chain interface {
 
 	ID() string
 	Config() config.Config
+	LogPoller() logpoller.ILogPoller
 	TxManager() TxManager
 	// Reader returns a new Reader from the available list of nodes (if there are multiple, it will randomly select one)
 	Reader() (client.Reader, error)
@@ -89,6 +91,7 @@ type chain struct {
 	services.StateMachine
 	id             string
 	cfg            *config.TOMLConfig
+	lp             logpoller.ILogPoller
 	txm            *txm.Txm
 	balanceMonitor services.Service
 	lggr           logger.Logger
@@ -235,6 +238,7 @@ func newChain(id string, cfg *config.TOMLConfig, ks core.Keystore, lggr logger.L
 		clientCache: map[string]*verifiedCachedClient{},
 	}
 
+	var lc internal.Loader[client.Reader] = utils.NewLazyLoad(func() (client.Reader, error) { return ch.getClient() })
 	var tc internal.Loader[client.ReaderWriter] = utils.NewLazyLoad(func() (client.ReaderWriter, error) { return ch.getClient() })
 	var bc internal.Loader[monitor.BalanceClient] = utils.NewLazyLoad(func() (monitor.BalanceClient, error) { return ch.getClient() })
 
@@ -303,10 +307,13 @@ func newChain(id string, cfg *config.TOMLConfig, ks core.Keystore, lggr logger.L
 			return result.Signature(), result.Error()
 		}
 
-		tc = internal.NewLoader[client.ReaderWriter](func() (client.ReaderWriter, error) { return ch.multiNode.SelectRPC() })
-		bc = internal.NewLoader[monitor.BalanceClient](func() (monitor.BalanceClient, error) { return ch.multiNode.SelectRPC() })
+		// TODO: Can we just remove these? They nullify the lazy loaders initialized earlier, don't they?
+		//lc = internal.NewLoader[client.Reader](func() (client.Reader, error) { return ch.multiNode.SelectRPC() })
+		//tc = internal.NewLoader[client.ReaderWriter](func() (client.ReaderWriter, error) { return ch.multiNode.SelectRPC() })
+		//bc = internal.NewLoader[monitor.BalanceClient](func() (monitor.BalanceClient, error) { return ch.multiNode.SelectRPC() })
 	}
 
+	ch.lp = logpoller.NewLogPoller(logger.Sugared(logger.Named(lggr, "LogPoller")), logpoller.NewORM(ch.ID(), ds, lggr), lc)
 	ch.txm = txm.NewTxm(ch.id, tc, sendTx, cfg, ks, lggr)
 	ch.balanceMonitor = monitor.NewBalanceMonitor(ch.id, cfg, lggr, ks, bc)
 	return &ch, nil
@@ -396,6 +403,10 @@ func (c *chain) Config() config.Config {
 	return c.cfg
 }
 
+func (c *chain) LogPoller() logpoller.ILogPoller {
+	return c.lp
+}
+
 func (c *chain) TxManager() TxManager {
 	return c.txm
 }

pkg/solana/logpoller/log_poller.go

@@ -10,6 +10,7 @@ import (
 	"github.com/smartcontractkit/chainlink-common/pkg/services"
 
 	"github.com/smartcontractkit/chainlink-solana/pkg/solana/client"
+	"github.com/smartcontractkit/chainlink-solana/pkg/solana/internal"
 )
 
 var (
@@ -24,11 +25,18 @@ type ORM interface {
 	MarkFilterDeleted(ctx context.Context, id int64) (err error)
 }
 
+type ILogPoller interface {
+	Start(context.Context) error
+	Close() error
+	RegisterFilter(ctx context.Context, filter Filter) error
+	UnregisterFilter(ctx context.Context, name string) error
+}
+
 type LogPoller struct {
 	services.StateMachine
 	lggr      logger.SugaredLogger
 	orm       ORM
-	client    client.Reader
+	client    internal.Loader[client.Reader]
 	collector *EncodedLogCollector
 
 	filters *filters
@@ -38,24 +46,29 @@ type LogPoller struct {
 	wg     sync.WaitGroup
 }
 
-func NewLogPoller(lggr logger.SugaredLogger, orm ORM, cl client.Reader) *LogPoller {
+func NewLogPoller(lggr logger.SugaredLogger, orm ORM, cl internal.Loader[client.Reader]) ILogPoller {
 	lggr = logger.Sugared(logger.Named(lggr, "LogPoller"))
 	lp := LogPoller{
 		orm:     orm,
 		client:  cl,
 		lggr:    lggr,
 		filters: newFilters(lggr, orm),
 	}
-	lp.collector = NewEncodedLogCollector(lp.client, lp, lp.lggr)
 	return &lp
 }
 
 func (lp LogPoller) Process(event ProgramEvent) error {
 	// process stream of events coming from event loader
+
 	return nil
 }
 
 func (lp *LogPoller) Start(context.Context) error {
+	cl, err := lp.client.Get()
+	if err != nil {
+		return err
+	}
+	lp.collector = NewEncodedLogCollector(cl, lp, lp.lggr)
 	return lp.StartOnce("LogPoller", func() error {
 		lp.wg.Add(2)
 		go lp.run()