Integrating drand interfaces into drand-cli codebase

[AnomalRoil]

This allows the drand-cli repo to be more independent from the drand/drand one.

[CluEleSsUK]

perhaps we should link to the new lib here?

[CluEleSsUK]

Mostly lgtm. Perhaps some advisory in the readme about where to find the client and how to migrated would be good

[AnomalRoil]

Okay, looking at migration in Lotus from old v1 to new client, here are next steps:

• Fix WithLogger to be a valid Option
• Fix Wrap to not take a Logger and a Context and have both be Options that get passed to it or maybe have logger be in the individual clients directly
• Discuss design around logger and clients, should clients have their own logger?
• Fix the WithPrometheus option: make sure metrics for the clients do work

Document:

• drand/crypto.GetSchemeByIDWithDefault -> drand/v2/crypto.GetSchemeByID
• Result.Round -> Result.GetRound()
• Result.Signature -> Result.GetSignature()
• chain.Beacon -> common.Beacon
• the HTTP client now returns a concrete type and doesn't need to be cast to a HTTP client to use SetUserAgent
• WithVerifigedResult -> WithTrustedResult

[AnomalRoil]

For reference, here is the changelog for Lotus to move to this new repo:

diff --git a/chain/beacon/drand/drand.go b/chain/beacon/drand/drand.go
index a44aa2862..348533f8d 100644
--- a/chain/beacon/drand/drand.go
+++ b/chain/beacon/drand/drand.go
@@ -5,12 +5,14 @@ import (
 	"context"
 	"time"
 
-	dchain "github.com/drand/drand/chain"
-	dclient "github.com/drand/drand/client"
-	hclient "github.com/drand/drand/client/http"
-	dcrypto "github.com/drand/drand/crypto"
-	dlog "github.com/drand/drand/log"
-	gclient "github.com/drand/drand/lp2p/client"
+	dcommon "github.com/drand/drand/v2/common"
+	dchain "github.com/drand/drand/v2/common/chain"
+	dlog "github.com/drand/drand/v2/common/log"
+	dcrypto "github.com/drand/drand/v2/crypto"
+	dclient "github.com/drand/go-clients/client"
+	hclient "github.com/drand/go-clients/client/http"
+	gclient "github.com/drand/go-clients/client/lp2p"
+	ddrand "github.com/drand/go-clients/drand"
 	"github.com/drand/kyber"
 	lru "github.com/hashicorp/golang-lru/v2"
 	logging "github.com/ipfs/go-log/v2"
@@ -39,7 +41,7 @@ var log = logging.Logger("drand")
 // The root trust for the Drand chain is configured from buildconstants.DrandConfigs
 type DrandBeacon struct {
 	isChained bool
-	client    dclient.Client
+	client    ddrand.Client
 
 	pubkey kyber.Point
 
@@ -92,21 +94,22 @@ func NewDrandBeacon(genesisTs, interval uint64, ps *pubsub.PubSub, config dtypes
 		return nil, xerrors.Errorf("unable to unmarshal drand chain info: %w", err)
 	}
 
+
+	dlog := &logger{&log.SugaredLogger}

-	var clients []dclient.Client
+	var clients []ddrand.Client
 	for _, url := range config.Servers {
-		hc, err := hclient.NewWithInfo(url, drandChain, nil)
+		hc, err := hclient.NewWithInfo(dlog, url, drandChain, nil)
 		if err != nil {
 			return nil, xerrors.Errorf("could not create http drand client: %w", err)
 		}
-		hc.(DrandHTTPClient).SetUserAgent("drand-client-lotus/" + build.NodeBuildVersion)
+		hc.SetUserAgent("drand-client-lotus/" + build.NodeBuildVersion)
 		clients = append(clients, hc)
-
 	}
 
 	opts := []dclient.Option{
 		dclient.WithChainInfo(drandChain),
 		dclient.WithCacheSize(1024),
-		dclient.WithLogger(&logger{&log.SugaredLogger}),
+		dclient.WithLogger(dlog),
 	}
 
 	if ps != nil {
@@ -131,7 +134,7 @@ func NewDrandBeacon(genesisTs, interval uint64, ps *pubsub.PubSub, config dtypes
 		localCache: lc,
 	}
 
-	sch, err := dcrypto.GetSchemeByIDWithDefault(drandChain.Scheme)
+	sch, err := dcrypto.GetSchemeByID(drandChain.Scheme)
 	if err != nil {
 		return nil, err
 	}
@@ -165,8 +168,8 @@ func (db *DrandBeacon) Entry(ctx context.Context, round uint64) <-chan beacon.Re
 		if err != nil {
 			br.Err = xerrors.Errorf("drand failed Get request: %w", err)
 		} else {
-			br.Entry.Round = resp.Round()
-			br.Entry.Data = resp.Signature()
+			br.Entry.Round = resp.GetRound()
+			br.Entry.Data = resp.GetSignature()
 		}
 		log.Debugw("done fetching randomness", "round", round, "took", build.Clock.Since(start))
 		out <- br
@@ -192,7 +195,7 @@ func (db *DrandBeacon) VerifyEntry(entry types.BeaconEntry, prevEntrySig []byte)
 		// return no error if the value is in the cache already
 		return nil
 	}
-	b := &dchain.Beacon{
+	b := &dcommon.Beacon{
 		PreviousSig: prevEntrySig,
 		Round:       entry.Round,
 		Signature:   entry.Data,

[CluEleSsUK]

just some minor readme changes, otherwise lgtm