maintainence(lib/babe): refactor code to use epochHandler for control…

… of epoch logic (#2151)

dot/types/authority.go

@@ -5,6 +5,7 @@ package types
 
 import (
 	"encoding/binary"
+	"fmt"
 	"io"
 
 	"github.com/ChainSafe/gossamer/lib/common"
@@ -74,6 +75,16 @@ func (a *Authority) ToRaw() *AuthorityRaw {
 	return raw
 }
 
+// DeepCopy creates a deep copy of the Authority
+func (a *Authority) DeepCopy() *Authority {
+	pk := a.Key.Encode()
+	pkCopy, _ := sr25519.NewPublicKey(pk[:])
+	return &Authority{
+		Key:    pkCopy,
+		Weight: a.Weight,
+	}
+}
+
 // FromRawSr25519 sets the Authority given AuthorityRaw. It converts the byte representations of
 // the authority public keys into a sr25519.PublicKey.
 func (a *Authority) FromRawSr25519(raw *AuthorityRaw) error {
@@ -93,6 +104,10 @@ type AuthorityRaw struct {
 	Weight uint64
 }
 
+func (a *AuthorityRaw) String() string {
+	return fmt.Sprintf("AuthorityRaw Key=0x%x Weight=%d", a.Key, a.Weight)
+}
+
 // AuthoritiesToRaw converts an array of Authority in an array of AuthorityRaw
 func AuthoritiesToRaw(auths []Authority) []AuthorityRaw {
 	raw := make([]AuthorityRaw, len(auths))

dot/types/consensus_digest.go

@@ -4,6 +4,8 @@
 package types
 
 import (
+	"fmt"
+
 	"github.com/ChainSafe/gossamer/pkg/scale"
 )
 
@@ -70,6 +72,10 @@ type NextEpochData struct {
 // Index Returns VDT index
 func (d NextEpochData) Index() uint { return 1 }
 
+func (d NextEpochData) String() string {
+	return fmt.Sprintf("NextEpochData Authorities=%v Randomness=%v", d.Authorities, d.Randomness)
+}
+
 // ToEpochData returns the NextEpochData as EpochData
 func (d *NextEpochData) ToEpochData() (*EpochData, error) {
 	auths, err := BABEAuthorityRawToAuthority(d.Authorities)