add: leader election proofs, beacon chain randomness, miner wallet and base miner structure

beacon/beacon.go

@@ -0,0 +1,155 @@
+package beacon
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/Secured-Finance/dione/lib"
+	"github.com/sirupsen/logrus"
+
+	"github.com/Secured-Finance/dione/types"
+)
+
+type Response struct {
+	Entry types.BeaconEntry
+	Err   error
+}
+
+type Schedule []BeaconPoint
+
+func (bs Schedule) BeaconForEpoch(e types.TaskEpoch) RandomBeacon {
+	for i := len(bs) - 1; i >= 0; i-- {
+		bp := bs[i]
+		if e >= bp.Start {
+			return bp.Beacon
+		}
+	}
+	return bs[0].Beacon
+}
+
+type BeaconPoint struct {
+	Start  types.TaskEpoch
+	Beacon RandomBeacon
+}
+
+// RandomBeacon represents a system that provides randomness.
+// Other components interrogate the RandomBeacon to acquire randomness that's
+// valid for a specific chain epoch. Also to verify beacon entries that have
+// been posted on chain.
+type RandomBeacon interface {
+	Entry(context.Context, uint64) <-chan Response
+	VerifyEntry(types.BeaconEntry, types.BeaconEntry) error
+	MaxBeaconRoundForEpoch(types.TaskEpoch) uint64
+}
+
+func ValidateTaskValues(bSchedule Schedule, t *types.DioneTask, parentEpoch types.TaskEpoch, prevEntry types.BeaconEntry) error {
+	{
+		parentBeacon := bSchedule.BeaconForEpoch(parentEpoch)
+		currBeacon := bSchedule.BeaconForEpoch(t.Height)
+		if parentBeacon != currBeacon {
+			if len(t.BeaconEntries) != 2 {
+				return fmt.Errorf("expected two beacon entries at beacon fork, got %d", len(t.BeaconEntries))
+			}
+			err := currBeacon.VerifyEntry(t.BeaconEntries[1], t.BeaconEntries[0])
+			if err != nil {
+				return fmt.Errorf("beacon at fork point invalid: (%v, %v): %w",
+					t.BeaconEntries[1], t.BeaconEntries[0], err)
+			}
+			return nil
+		}
+	}
+
+	// TODO: fork logic
+	b := bSchedule.BeaconForEpoch(t.Height)
+	maxRound := b.MaxBeaconRoundForEpoch(t.Height)
+	if maxRound == prevEntry.Round {
+		if len(t.BeaconEntries) != 0 {
+			return fmt.Errorf("expected not to have any beacon entries in this task, got %d", len(t.BeaconEntries))
+		}
+		return nil
+	}
+
+	if len(t.BeaconEntries) == 0 {
+		return fmt.Errorf("expected to have beacon entries in this task, but didn't find any")
+	}
+
+	last := t.BeaconEntries[len(t.BeaconEntries)-1]
+	if last.Round != maxRound {
+		return fmt.Errorf("expected final beacon entry in task to be at round %d, got %d", maxRound, last.Round)
+	}
+
+	for i, e := range t.BeaconEntries {
+		if err := b.VerifyEntry(e, prevEntry); err != nil {
+			return fmt.Errorf("beacon entry %d (%d - %x (%d)) was invalid: %w", i, e.Round, e.Data, len(e.Data), err)
+		}
+		prevEntry = e
+	}
+
+	return nil
+}
+
+func BeaconEntriesForTask(ctx context.Context, bSchedule Schedule, epoch types.TaskEpoch, parentEpoch types.TaskEpoch, prev types.BeaconEntry) ([]types.BeaconEntry, error) {
+	{
+		parentBeacon := bSchedule.BeaconForEpoch(parentEpoch)
+		currBeacon := bSchedule.BeaconForEpoch(epoch)
+		if parentBeacon != currBeacon {
+			// Fork logic
+			round := currBeacon.MaxBeaconRoundForEpoch(epoch)
+			out := make([]types.BeaconEntry, 2)
+			rch := currBeacon.Entry(ctx, round-1)
+			res := <-rch
+			if res.Err != nil {
+				return nil, fmt.Errorf("getting entry %d returned error: %w", round-1, res.Err)
+			}
+			out[0] = res.Entry
+			rch = currBeacon.Entry(ctx, round)
+			res = <-rch
+			if res.Err != nil {
+				return nil, fmt.Errorf("getting entry %d returned error: %w", round, res.Err)
+			}
+			out[1] = res.Entry
+			return out, nil
+		}
+	}
+
+	beacon := bSchedule.BeaconForEpoch(epoch)
+
+	start := lib.Clock.Now()
+
+	maxRound := beacon.MaxBeaconRoundForEpoch(epoch)
+	if maxRound == prev.Round {
+		return nil, nil
+	}
+
+	// TODO: this is a sketchy way to handle the genesis block not having a beacon entry
+	if prev.Round == 0 {
+		prev.Round = maxRound - 1
+	}
+
+	cur := maxRound
+	var out []types.BeaconEntry
+	for cur > prev.Round {
+		rch := beacon.Entry(ctx, cur)
+		select {
+		case resp := <-rch:
+			if resp.Err != nil {
+				return nil, fmt.Errorf("beacon entry request returned error: %w", resp.Err)
+			}
+
+			out = append(out, resp.Entry)
+			cur = resp.Entry.Round - 1
+		case <-ctx.Done():
+			return nil, fmt.Errorf("context timed out waiting on beacon entry to come back for epoch %d: %w", epoch, ctx.Err())
+		}
+	}
+
+	logrus.Debug("fetching beacon entries", "took", lib.Clock.Since(start), "numEntries", len(out))
+	reverse(out)
+	return out, nil
+}
+
+func reverse(arr []types.BeaconEntry) {
+	for i := 0; i < len(arr)/2; i++ {
+		arr[i], arr[len(arr)-(1+i)] = arr[len(arr)-(1+i)], arr[i]
+	}
+}

config/tasks.go

@@ -0,0 +1,9 @@
+package config
+
+var ExpectedLeadersPerEpoch = int64(5)
+
+var TasksPerEpoch = uint64(ExpectedLeadersPerEpoch)
+
+var ChainGenesis = uint64(1603603302)
+
+var TaskEpochInterval = uint64(15)

consensus/leader.go

@@ -0,0 +1,85 @@
+package consensus
+
+import (
+	"bytes"
+	"context"
+	"fmt"
+
+	"github.com/Secured-Finance/dione/types"
+	"github.com/filecoin-project/go-address"
+	"github.com/filecoin-project/go-state-types/crypto"
+	"github.com/filecoin-project/lotus/lib/sigs"
+	"go.opencensus.io/trace"
+	"golang.org/x/xerrors"
+)
+
+type MinerWallet interface {
+	WalletSign(context.Context, address.Address, []byte) (*crypto.Signature, error)
+}
+
+type MinerBase struct {
+	MinerStake      types.BigInt
+	NetworkStake    types.BigInt
+	WorkerKey       address.Address
+	PrevBeaconEntry types.BeaconEntry
+	BeaconEntries   []types.BeaconEntry
+}
+
+type SignFunc func(context.Context, address.Address, []byte) (*crypto.Signature, error)
+
+func ComputeVRF(ctx context.Context, sign SignFunc, worker address.Address, sigInput []byte) ([]byte, error) {
+	sig, err := sign(ctx, worker, sigInput)
+	if err != nil {
+		return nil, err
+	}
+
+	if sig.Type != crypto.SigTypeBLS {
+		return nil, fmt.Errorf("miner worker address was not a BLS key")
+	}
+
+	return sig.Data, nil
+}
+
+func VerifyVRF(ctx context.Context, worker address.Address, vrfBase, vrfproof []byte) error {
+	_, span := trace.StartSpan(ctx, "VerifyVRF")
+	defer span.End()
+
+	sig := &crypto.Signature{
+		Type: crypto.SigTypeBLS,
+		Data: vrfproof,
+	}
+
+	if err := sigs.Verify(sig, worker, vrfBase); err != nil {
+		return xerrors.Errorf("vrf was invalid: %w", err)
+	}
+
+	return nil
+}
+
+func IsRoundWinner(ctx context.Context, round types.TaskEpoch,
+	worker address.Address, brand types.BeaconEntry, mbi *MinerBase, a MinerWallet) (*types.ElectionProof, error) {
+
+	buf := new(bytes.Buffer)
+	if err := worker.MarshalCBOR(buf); err != nil {
+		return nil, xerrors.Errorf("failed to cbor marshal address: %w", err)
+	}
+
+	electionRand, err := DrawRandomness(brand.Data, crypto.DomainSeparationTag_ElectionProofProduction, round, buf.Bytes())
+	if err != nil {
+		return nil, xerrors.Errorf("failed to draw randomness: %w", err)
+	}
+
+	vrfout, err := ComputeVRF(ctx, a.WalletSign, mbi.WorkerKey, electionRand)
+	if err != nil {
+		return nil, xerrors.Errorf("failed to compute VRF: %w", err)
+	}
+
+	ep := &types.ElectionProof{VRFProof: vrfout}
+	j := ep.ComputeWinCount(mbi.MinerPower, mbi.NetworkPower)
+	ep.WinCount = j
+	if j < 1 {
+		return nil, nil
+	}
+
+	return ep, nil
+}

consensus/randomness.go

@@ -0,0 +1,31 @@
+package consensus
+
+import (
+	"encoding/binary"
+
+	"github.com/Secured-Finance/dione/types"
+	"github.com/filecoin-project/go-state-types/crypto"
+	"github.com/minio/blake2b-simd"
+	"golang.org/x/xerrors"
+)
+
+func DrawRandomness(rbase []byte, pers crypto.DomainSeparationTag, round types.TaskEpoch, entropy []byte) ([]byte, error) {
+	h := blake2b.New256()
+	if err := binary.Write(h, binary.BigEndian, int64(pers)); err != nil {
+		return nil, xerrors.Errorf("deriving randomness: %w", err)
+	}
+	VRFDigest := blake2b.Sum256(rbase)
+	_, err := h.Write(VRFDigest[:])
+	if err != nil {
+		return nil, xerrors.Errorf("hashing VRFDigest: %w", err)
+	}
+	if err := binary.Write(h, binary.BigEndian, round); err != nil {
+		return nil, xerrors.Errorf("deriving randomness: %w", err)
+	}
+	_, err = h.Write(entropy)
+	if err != nil {
+		return nil, xerrors.Errorf("hashing entropy: %w", err)
+	}
+
+	return h.Sum(nil), nil
+}

drand/drand.go

@@ -7,6 +7,7 @@ import (
 	"sync"
 	"time"
 
+	"github.com/Secured-Finance/dione/beacon"
 	"github.com/drand/drand/chain"
 	"github.com/drand/drand/client"
 	httpClient "github.com/drand/drand/client/http"
@@ -18,8 +19,10 @@ import (
 
 	"github.com/Secured-Finance/dione/config"
 	"github.com/Secured-Finance/dione/lib"
+	types "github.com/Secured-Finance/dione/types"
 )
 
+//	DrandRes structure representing response from drand network
 type DrandRes struct {
 	// PreviousSig is the previous signature generated
 	PreviousSig []byte
@@ -31,21 +34,19 @@ type DrandRes struct {
 	Randomness []byte
 }
 
-type Beacon struct {
-	DrandResponse DrandRes
-	Error         error
-}
-
 type DrandBeacon struct {
 	DrandClient      client.Client
 	PublicKey        kyber.Point
 	Interval         time.Duration
+	chainGenesisTime uint64
+	chainRoundTime   uint64
+
 	drandGenesisTime uint64
 	cacheLock        sync.Mutex
-	localCache       map[uint64]DrandRes
+	localCache       map[uint64]types.BeaconEntry
 }
 
-func NewDrandBeacon(ps *pubsub.PubSub) (*DrandBeacon, error) {
+func NewDrandBeacon(genesisTs, interval uint64, ps *pubsub.PubSub) (*DrandBeacon, error) {
 	cfg := config.NewDrandConfig()
 
 	drandChain, err := chain.InfoFromJSON(bytes.NewReader([]byte(cfg.ChainInfo)))
@@ -81,22 +82,24 @@ func NewDrandBeacon(ps *pubsub.PubSub) (*DrandBeacon, error) {
 
 	db := &DrandBeacon{
 		DrandClient: drandClient,
-		localCache:  make(map[uint64]DrandRes),
+		localCache:  make(map[uint64]types.BeaconEntry),
 	}
 
 	db.PublicKey = drandChain.PublicKey
 	db.Interval = drandChain.Period
 	db.drandGenesisTime = uint64(drandChain.GenesisTime)
+	db.chainRoundTime = interval
+	db.chainGenesisTime = genesisTs
 
 	return db, nil
 }
 
-func (db *DrandBeacon) Entry(ctx context.Context, round uint64) <-chan Beacon {
+func (db *DrandBeacon) Entry(ctx context.Context, round uint64) <-chan beacon.Response {
-	out := make(chan Beacon, 1)
+	out := make(chan beacon.Response, 1)
 	if round != 0 {
-		res := db.getCachedValue(round)
+		be := db.getCachedValue(round)
-		if res != nil {
+		if be != nil {
-			out <- Beacon{DrandResponse: *res}
+			out <- beacon.Response{Entry: *be}
 			close(out)
 			return out
 		}
@@ -107,27 +110,27 @@ func (db *DrandBeacon) Entry(ctx context.Context, round uint64) <-chan Beacon {
 		logrus.Info("start fetching randomness", "round", round)
 		resp, err := db.DrandClient.Get(ctx, round)
 
-		var res Beacon
+		var br beacon.Response
 		if err != nil {
-			res.Error = fmt.Errorf("drand failed Get request: %w", err)
+			br.Err = fmt.Errorf("drand failed Get request: %w", err)
 		} else {
-			res.DrandResponse.Round = resp.Round()
+			br.Entry.Round = resp.Round()
-			res.DrandResponse.Signature = resp.Signature()
+			br.Entry.Data = resp.Signature()
 		}
 		logrus.Info("done fetching randomness", "round", round, "took", lib.Clock.Since(start))
-		out <- res
+		out <- br
 		close(out)
 	}()
 
 	return out
 }
-func (db *DrandBeacon) cacheValue(res DrandRes) {
+func (db *DrandBeacon) cacheValue(res types.BeaconEntry) {
 	db.cacheLock.Lock()
 	defer db.cacheLock.Unlock()
 	db.localCache[res.Round] = res
 }
 
-func (db *DrandBeacon) getCachedValue(round uint64) *DrandRes {
+func (db *DrandBeacon) getCachedValue(round uint64) *types.BeaconEntry {
 	db.cacheLock.Lock()
 	defer db.cacheLock.Unlock()
 	v, ok := db.localCache[round]
@@ -137,7 +140,7 @@ func (db *DrandBeacon) getCachedValue(round uint64) *DrandRes {
 	return &v
 }
 
-func (db *DrandBeacon) VerifyEntry(curr DrandRes, prev DrandRes) error {
+func (db *DrandBeacon) VerifyEntry(curr, prev types.BeaconEntry) error {
 	if prev.Round == 0 {
 		return nil
 	}
@@ -145,9 +148,9 @@ func (db *DrandBeacon) VerifyEntry(curr DrandRes, prev DrandRes) error {
 		return nil
 	}
 	b := &chain.Beacon{
-		PreviousSig: prev.PreviousSig,
+		PreviousSig: prev.Data,
 		Round:       curr.Round,
-		Signature:   curr.Signature,
+		Signature:   curr.Data,
 	}
 	err := chain.VerifyBeacon(db.PublicKey, b)
 	if err == nil {
@@ -155,3 +158,17 @@ func (db *DrandBeacon) VerifyEntry(curr DrandRes, prev DrandRes) error {
 	}
 	return err
 }
+
+func (db *DrandBeacon) MaxBeaconRoundForEpoch(taskEpoch types.TaskEpoch) uint64 {
+	var latestTs uint64
+	if taskEpoch == 0 {
+		latestTs = db.chainGenesisTime
+	} else {
+		latestTs = ((uint64(taskEpoch) * db.chainRoundTime) + db.chainGenesisTime) - db.chainRoundTime
+	}
+
+	dround := (latestTs - db.drandGenesisTime) / uint64(db.Interval.Seconds())
+	return dround
+}
+
+var _ beacon.RandomBeacon = (*DrandBeacon)(nil)

go.mod

@@ -11,17 +11,16 @@ require (
 	github.com/drand/kyber v1.1.5
 	github.com/elastic/gosigar v0.10.5 // indirect
 	github.com/ethereum/go-ethereum v1.9.5
+	github.com/filecoin-project/go-address v0.0.4
+	github.com/filecoin-project/go-crypto v0.0.0-20191218222705-effae4ea9f03
 	github.com/filecoin-project/go-state-types v0.0.0-20201021025442-0ac4de847f4f
-	github.com/filecoin-project/lotus v1.1.0
+	github.com/filecoin-project/lotus v1.1.2
 	github.com/fjl/memsize v0.0.0-20190710130421-bcb5799ab5e5 // indirect
 	github.com/gballet/go-libpcsclite v0.0.0-20191108122812-4678299bea08 // indirect
 	github.com/go-kit/kit v0.10.0
 	github.com/golang/groupcache v0.0.0-20200121045136-8c9f03a8e57e // indirect
-	github.com/golang/protobuf v1.4.2 // indirect
 	github.com/google/uuid v1.1.1
 	github.com/gopherjs/gopherjs v0.0.0-20190812055157-5d271430af9f // indirect
-	github.com/ipfs/go-log v1.0.4
-	github.com/ipfs/go-log/v2 v2.1.2-0.20200626104915-0016c0b4b3e4
 	github.com/karalabe/usb v0.0.0-20191104083709-911d15fe12a9 // indirect
 	github.com/libp2p/go-libp2p v0.11.0
 	github.com/libp2p/go-libp2p-core v0.6.1
@@ -29,11 +28,14 @@ require (
 	github.com/libp2p/go-libp2p-kad-dht v0.8.3
 	github.com/libp2p/go-libp2p-peerstore v0.2.6
 	github.com/libp2p/go-libp2p-pubsub v0.3.6
+	github.com/minio/blake2b-simd v0.0.0-20160723061019-3f5f724cb5b1
 	github.com/multiformats/go-multiaddr v0.3.1
 	github.com/olekukonko/tablewriter v0.0.4 // indirect
+	github.com/prometheus/common v0.10.0
 	github.com/raulk/clock v1.1.0
 	github.com/rjeczalik/notify v0.9.2 // indirect
 	github.com/rs/cors v1.7.0 // indirect
+	github.com/rs/zerolog v1.20.0
 	github.com/sirupsen/logrus v1.6.0
 	github.com/smartystreets/assertions v1.0.1 // indirect
 	github.com/spf13/viper v1.7.1
@@ -41,8 +43,11 @@ require (
 	github.com/steakknife/bloomfilter v0.0.0-20180922174646-6819c0d2a570 // indirect
 	github.com/steakknife/hamming v0.0.0-20180906055917-c99c65617cd3 // indirect
 	github.com/stretchr/testify v1.6.1
+	github.com/supranational/blst v0.1.1
 	github.com/tyler-smith/go-bip39 v1.0.2 // indirect
 	github.com/wsddn/go-ecdh v0.0.0-20161211032359-48726bab9208 // indirect
+	github.com/xorcare/golden v0.6.1-0.20191112154924-b87f686d7542
+	go.opencensus.io v0.22.4
 	golang.org/x/lint v0.0.0-20200302205851-738671d3881b // indirect
 	golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1
 	gopkg.in/natefinch/npipe.v2 v2.0.0-20160621034901-c1b8fa8bdcce // indirect

go.sum

@@ -52,9 +52,11 @@ github.com/aead/siphash v1.0.1/go.mod h1:Nywa3cDsYNNK3gaciGTWPwHt0wlpNV15vwmswBA
 github.com/afex/hystrix-go v0.0.0-20180502004556-fa1af6a1f4f5/go.mod h1:SkGFH1ia65gfNATL8TAiHDNxPzPdmEL5uirI2Uyuz6c=
 github.com/akavel/rsrc v0.8.0/go.mod h1:uLoCtb9J+EyAqh+26kdrTgmzRBFPGOolLWKpdxkKq+c=
 github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
+github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751 h1:JYp7IbQjafoB+tBA3gMyHYHrpOtNuDiK/uB5uXxq5wM=
 github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
 github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
 github.com/alecthomas/units v0.0.0-20190717042225-c3de453c63f4/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
+github.com/alecthomas/units v0.0.0-20190924025748-f65c72e2690d h1:UQZhZ2O0vMHr2cI+DC1Mbh0TJxzA3RcLoMsFw+aXw7E=
 github.com/alecthomas/units v0.0.0-20190924025748-f65c72e2690d/go.mod h1:rBZYJk541a8SKzHPHnH3zbiI+7dagKZ0cgpgrD7Fyho=
 github.com/allegro/bigcache v1.2.1 h1:hg1sY1raCwic3Vnsvje6TT7/pnZba83LeFck5NrFKSc=
 github.com/allegro/bigcache v1.2.1/go.mod h1:Cb/ax3seSYIx7SuZdm2G2xzfwmv3TPSk2ucNfQESPXM=
@@ -127,6 +129,7 @@ github.com/cockroachdb/datadriven v0.0.0-20190809214429-80d97fb3cbaa/go.mod h1:z
 github.com/cockroachdb/errors v1.2.4/go.mod h1:rQD95gz6FARkaKkQXUksEje/d9a6wBJoCr5oaCLELYA=
 github.com/cockroachdb/logtags v0.0.0-20190617123548-eb05cc24525f/go.mod h1:i/u985jwjWRlyHXQbwatDASoW0RMlZ/3i9yJHE2xLkI=
 github.com/cockroachdb/pebble v0.0.0-20200916222308-4e219a90ba5b/go.mod h1:hU7vhtrqonEphNF+xt8/lHdaBprxmV1h8BOGrd9XwmQ=
+github.com/cockroachdb/pebble v0.0.0-20201001221639-879f3bfeef07/go.mod h1:hU7vhtrqonEphNF+xt8/lHdaBprxmV1h8BOGrd9XwmQ=
 github.com/cockroachdb/redact v0.0.0-20200622112456-cd282804bbd3/go.mod h1:BVNblN9mBWFyMyqK1k3AAiSxhvhfK2oOZZ2lK+dpvRg=
 github.com/codahale/hdrhistogram v0.0.0-20161010025455-3a0bb77429bd/go.mod h1:sE/e/2PUdi/liOCUjSTXgM1o87ZssimdTWN964YiIeI=
 github.com/coreos/bbolt v1.3.2/go.mod h1:iRUV2dpdMOn7Bo10OQBFzIJO9kkE559Wcmn+qkEiiKk=
@@ -147,8 +150,10 @@ github.com/coreos/pkg v0.0.0-20180928190104-399ea9e2e55f/go.mod h1:E3G3o1h8I7cfc
 github.com/cpuguy83/go-md2man v1.0.10/go.mod h1:SmD6nW6nTyfqj6ABTjUi3V3JVMnlJmwcJI5acqYI6dE=
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@@ -162,6 +167,7 @@ github.com/davidlazar/go-crypto v0.0.0-20190912175916-7055855a373f h1:BOaYiTvg8p
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@@ -206,6 +212,7 @@ github.com/eapache/go-xerial-snappy v0.0.0-20180814174437-776d5712da21/go.mod h1
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@@ -224,6 +231,7 @@ github.com/fatih/color v1.7.0/go.mod h1:Zm6kSWBoL9eyXnKyktHP6abPY2pDugNf5Kwzbycv
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@@ -240,10 +248,12 @@ github.com/filecoin-project/go-bitfield v0.2.1 h1:S6Uuqcspqu81sWJ0He4OAfFLm1tSwP
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@@ -251,9 +261,11 @@ github.com/filecoin-project/go-hamt-ipld v0.1.5 h1:uoXrKbCQZ49OHpsTCkrThPNelC4W3
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@@ -262,19 +274,24 @@ github.com/filecoin-project/go-state-types v0.0.0-20200928172055-2df22083d8ab/go
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@@ -399,6 +416,7 @@ github.com/gorilla/context v1.1.1/go.mod h1:kBGZzfjB9CEq2AlWe17Uuf7NDRt0dE0s8S51
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@@ -523,11 +541,14 @@ github.com/ipfs/go-ds-badger2 v0.1.1-0.20200708190120-187fc06f714e/go.mod h1:lJn
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@@ -559,6 +580,7 @@ github.com/ipfs/go-ipfs-exchange-offline v0.0.1/go.mod h1:WhHSFCVYX36H/anEKQboAz
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@@ -610,6 +632,7 @@ github.com/ipfs/go-merkledag v0.3.2 h1:MRqj40QkrWkvPswXs4EfSslhZ4RVPRbxwX11js0t1
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@@ -625,12 +648,15 @@ github.com/ipfs/go-verifcid v0.0.1/go.mod h1:5Hrva5KBeIog4A+UpqlaIU+DEstipcJYQQZ
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@@ -654,6 +680,7 @@ github.com/jessevdk/go-flags v0.0.0-20141203071132-1679536dcc89/go.mod h1:4FA24M
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@@ -676,6 +703,7 @@ github.com/kabukky/httpscerts v0.0.0-20150320125433-617593d7dcb3/go.mod h1:BYpt4
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@@ -1074,6 +1102,7 @@ github.com/minio/sha256-simd v0.1.1 h1:5QHSlgo3nt5yKOJrC7W8w7X+NFl8cMPZm96iu8kKU
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@@ -1286,6 +1315,9 @@ github.com/rogpeppe/go-internal v1.3.0/go.mod h1:M8bDsm7K2OlrFYOpmOWEs/qY81heoFR
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@@ -1384,6 +1416,7 @@ github.com/stretchr/testify v1.6.1 h1:hDPOHmpOpP40lSULcqw7IrRb/u7w6RpDC9399XyoNd
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@@ -1442,12 +1475,14 @@ github.com/whyrusleeping/go-smux-multiplex v3.0.16+incompatible/go.mod h1:34LEDb
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@@ -1459,13 +1494,16 @@ github.com/xdg/scram v0.0.0-20180814205039-7eeb5667e42c/go.mod h1:lB8K/P019DLNhe
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@@ -1493,8 +1531,13 @@ go.uber.org/atomic v1.5.0/go.mod h1:sABNBOSYdrvTF6hTgEIbc7YasKWGhgEQZyfxyTvoXHQ=
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@@ -1510,6 +1553,7 @@ go.uber.org/zap v1.14.1/go.mod h1:Mb2vm2krFEG5DV0W9qcHBYFtp/Wku1cvYaqPsS/WYfc=
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@@ -1642,6 +1686,7 @@ golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJ
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@@ -1742,6 +1787,7 @@ golang.org/x/tools v0.0.0-20190606124116-d0a3d012864b/go.mod h1:/rFqwRUd4F7ZHNgw
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 golang.org/x/tools v0.0.0-20190911174233-4f2ddba30aff/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20190912185636-87d9f09c5d89/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20191012152004-8de300cfc20a/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
@@ -1751,6 +1797,7 @@ golang.org/x/tools v0.0.0-20191030062658-86caa796c7ab/go.mod h1:b+2E5dAYhXwXZwtn
 golang.org/x/tools v0.0.0-20191108193012-7d206e10da11/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20191112195655-aa38f8e97acc/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20191113191852-77e3bb0ad9e7/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
+golang.org/x/tools v0.0.0-20191114200427-caa0b0f7d508/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20191115202509-3a792d9c32b2/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20191125144606-a911d9008d1f/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
@@ -1846,6 +1893,7 @@ google.golang.org/protobuf v1.24.0 h1:UhZDfRO8JRQru4/+LlLE0BRKGF8L+PICnvYZmx/fEG
 google.golang.org/protobuf v1.24.0/go.mod h1:r/3tXBNzIEhYS9I1OUVjXDlt8tc493IdKGjtUeSXeh4=
 google.golang.org/protobuf v1.25.0 h1:Ejskq+SyPohKW+1uil0JJMtmHCgJPJ/qWTxr8qp+R4c=
 google.golang.org/protobuf v1.25.0/go.mod h1:9JNX74DMeImyA3h4bdi1ymwjUzf21/xIlbajtzgsN7c=
+gopkg.in/alecthomas/kingpin.v2 v2.2.6 h1:jMFz6MfLP0/4fUyZle81rXUoxOBFi19VUFKVDOQfozc=
 gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLkstjWtayDeSgw=
 gopkg.in/bsm/ratelimit.v1 v1.0.0-20160220154919-db14e161995a/go.mod h1:KF9sEfUPAXdG8Oev9e99iLGnl2uJMjc5B+4y3O7x610=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
@@ -1901,6 +1949,7 @@ honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWh
 honnef.co/go/tools v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg=
 honnef.co/go/tools v0.0.1-2020.1.3 h1:sXmLre5bzIR6ypkjXCDI3jHPssRhc8KD/Ome589sc3U=
 honnef.co/go/tools v0.0.1-2020.1.3/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k=
+howett.net/plist v0.0.0-20181124034731-591f970eefbb h1:jhnBjNi9UFpfpl8YZhA9CrOqpnJdvzuiHsl/dnxl11M=
 howett.net/plist v0.0.0-20181124034731-591f970eefbb/go.mod h1:vMygbs4qMhSZSc4lCUl2OEE+rDiIIJAIdR4m7MiMcm0=
 launchpad.net/gocheck v0.0.0-20140225173054-000000000087/go.mod h1:hj7XX3B/0A+80Vse0e+BUHsHMTEhd0O4cpUHr/e/BUM=
 rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8=

node/beacon.go

@@ -0,0 +1,21 @@
+package node
+
+import (
+	"fmt"
+
+	"github.com/Secured-Finance/dione/beacon"
+	"github.com/Secured-Finance/dione/config"
+	"github.com/Secured-Finance/dione/drand"
+)
+
+//	NewBeaconSchedule creates a new beacon chain schedule
+func (n *Node) NewBeaconSchedule() (beacon.Schedule, error) {
+	schedule := beacon.Schedule{}
+	bc, err := drand.NewDrandBeacon(config.ChainGenesis, config.TaskEpochInterval, n.PubSubRouter.Pubsub)
+	if err != nil {
+		return nil, fmt.Errorf("creating drand beacon: %w", err)
+	}
+	schedule = append(schedule, beacon.BeaconPoint{Start: 0, Beacon: bc})
+
+	return schedule, nil
+}

node/node.go

@@ -5,10 +5,11 @@ import (
 	"crypto/rand"
 	"flag"
 	"fmt"
-	"github.com/libp2p/go-libp2p-kad-dht/dual"
 	"sync"
 	"time"
 
+	"github.com/libp2p/go-libp2p-kad-dht/dual"
+
 	"github.com/Secured-Finance/dione/config"
 	"github.com/Secured-Finance/dione/consensus"
 	"github.com/Secured-Finance/dione/pb"
@@ -212,3 +213,5 @@ func generatePrivateKey() (crypto.PrivKey, error) {
 	}
 	return prvKey, nil
 }
+
+// TODO generate MinerBase for the node

node/node_test.go

@@ -46,7 +46,6 @@ func TestConsensus(t *testing.T) {
 	cfg.ListenPort = "1239"
 	node6 := newNode(cfg)
 
-
 	time.Sleep(10 * time.Second)
 	go node2.ConsensusManager.NewTestConsensus("test", "123")
 	go node1.ConsensusManager.NewTestConsensus("test1", "123")
@@ -54,7 +53,7 @@ func TestConsensus(t *testing.T) {
 	go node4.ConsensusManager.NewTestConsensus("test1", "123")
 	go node5.ConsensusManager.NewTestConsensus("test", "123")
 	go node6.ConsensusManager.NewTestConsensus("test2", "123")
-	select{}
+	select {}
 }
 
 func newNode(cfg *config.Config) *Node {

pb/pubsub_router.go

@@ -13,7 +13,7 @@ import (
 
 type PubSubRouter struct {
 	node          host.Host
-	pubsub        *pubsub.PubSub
+	Pubsub        *pubsub.PubSub
 	context       context.Context
 	contextCancel context.CancelFunc
 	handlers      map[string][]Handler
@@ -44,7 +44,7 @@ func NewPubSubRouter(h host.Host, oracleTopic string) *PubSubRouter {
 	if err != nil {
 		logrus.Fatal("Error occurred when subscribing to service topic", err)
 	}
-	psr.pubsub = pb
+	psr.Pubsub = pb
 
 	go func() {
 		for {
@@ -109,7 +109,7 @@ func (psr *PubSubRouter) BroadcastToServiceTopic(msg *models.Message) error {
 	if err != nil {
 		return err
 	}
-	err = psr.pubsub.Publish(psr.oracleTopic, data)
+	err = psr.Pubsub.Publish(psr.oracleTopic, data)
 	return err
 }
 

store/stake.go

@@ -0,0 +1,9 @@
+package store
+
+import "math/big"
+
+// TODO: specify store for staking mechanism
+type StakeTokenInfo struct {
+	TotalTokensStaked *big.Int
+	NodeTokensStaked  *big.Int
+}

store/store.go

@@ -0,0 +1,22 @@
+package store
+
+import (
+	"database/sql"
+
+	"github.com/Secured-Finance/dione/node"
+)
+
+type Store struct {
+	db        *sql.DB
+	node      *node.Node
+	genesisTs uint64
+	// genesisTask *types.DioneTask
+}
+
+func NewStore(db *sql.DB, node *node.Node, genesisTs uint64) *Store {
+	return &Store{
+		db:        db,
+		node:      node,
+		genesisTs: genesisTs,
+	}
+}

types/beacon.go

@@ -0,0 +1,15 @@
+package types
+
+type BeaconEntry struct {
+	Round uint64
+	Data  []byte
+}
+
+type Randomness []byte
+
+func NewBeaconEntry(round uint64, data []byte) BeaconEntry {
+	return BeaconEntry{
+		Round: round,
+		Data:  data,
+	}
+}

types/bigint.go

@@ -0,0 +1,20 @@
+package types
+
+import (
+	"math/big"
+
+	big2 "github.com/filecoin-project/go-state-types/big"
+)
+
+var EmptyInt = BigInt{}
+
+type BigInt = big2.Int
+
+func NewInt(i uint64) BigInt {
+	return BigInt{Int: big.NewInt(0).SetUint64(i)}
+}
+
+func BigFromBytes(b []byte) BigInt {
+	i := big.NewInt(0).SetBytes(b)
+	return BigInt{Int: i}
+}

types/electionproof.go

@@ -0,0 +1,205 @@
+package types
+
+import (
+	"math/big"
+
+	"github.com/Secured-Finance/dione/config"
+	"github.com/minio/blake2b-simd"
+)
+
+type ElectionProof struct {
+	WinCount int64
+	VRFProof []byte
+}
+
+const precision = 256
+
+var (
+	expNumCoef  []*big.Int
+	expDenoCoef []*big.Int
+)
+
+func init() {
+	parse := func(coefs []string) []*big.Int {
+		out := make([]*big.Int, len(coefs))
+		for i, coef := range coefs {
+			c, ok := new(big.Int).SetString(coef, 10)
+			if !ok {
+				panic("could not parse exp paramemter")
+			}
+			// << 256 (Q.0 to Q.256), >> 128 to transform integer params to coefficients
+			c = c.Lsh(c, precision-128)
+			out[i] = c
+		}
+		return out
+	}
+
+	// parameters are in integer format,
+	// coefficients are *2^-128 of that
+	num := []string{
+		"-648770010757830093818553637600",
+		"67469480939593786226847644286976",
+		"-3197587544499098424029388939001856",
+		"89244641121992890118377641805348864",
+		"-1579656163641440567800982336819953664",
+		"17685496037279256458459817590917169152",
+		"-115682590513835356866803355398940131328",
+		"340282366920938463463374607431768211456",
+	}
+	expNumCoef = parse(num)
+
+	deno := []string{
+		"1225524182432722209606361",
+		"114095592300906098243859450",
+		"5665570424063336070530214243",
+		"194450132448609991765137938448",
+		"5068267641632683791026134915072",
+		"104716890604972796896895427629056",
+		"1748338658439454459487681798864896",
+		"23704654329841312470660182937960448",
+		"259380097567996910282699886670381056",
+		"2250336698853390384720606936038375424",
+		"14978272436876548034486263159246028800",
+		"72144088983913131323343765784380833792",
+		"224599776407103106596571252037123047424",
+		"340282366920938463463374607431768211456",
+	}
+	expDenoCoef = parse(deno)
+}
+
+// expneg accepts x in Q.256 format and computes e^-x.
+// It is most precise within [0, 1.725) range, where error is less than 3.4e-30.
+// Over the [0, 5) range its error is less than 4.6e-15.
+// Output is in Q.256 format.
+func expneg(x *big.Int) *big.Int {
+	// exp is approximated by rational function
+	// polynomials of the rational function are evaluated using Horner's method
+	num := polyval(expNumCoef, x)   // Q.256
+	deno := polyval(expDenoCoef, x) // Q.256
+
+	num = num.Lsh(num, precision) // Q.512
+	return num.Div(num, deno)     // Q.512 / Q.256 => Q.256
+}
+
+// polyval evaluates a polynomial given by coefficients `p` in Q.256 format
+// at point `x` in Q.256 format. Output is in Q.256.
+// Coefficients should be ordered from the highest order coefficient to the lowest.
+func polyval(p []*big.Int, x *big.Int) *big.Int {
+	// evaluation using Horner's method
+	res := new(big.Int).Set(p[0]) // Q.256
+	tmp := new(big.Int)           // big.Int.Mul doesn't like when input is reused as output
+	for _, c := range p[1:] {
+		tmp = tmp.Mul(res, x)         // Q.256 * Q.256 => Q.512
+		res = res.Rsh(tmp, precision) // Q.512 >> 256 => Q.256
+		res = res.Add(res, c)
+	}
+
+	return res
+}
+
+// computes lambda in Q.256
+func lambda(power, totalPower *big.Int) *big.Int {
+	lam := new(big.Int).Mul(power, tasksPerEpoch.Int)    // Q.0
+	lam = lam.Lsh(lam, precision)                        // Q.256
+	lam = lam.Div(lam /* Q.256 */, totalPower /* Q.0 */) // Q.256
+	return lam
+}
+
+var MaxWinCount = 3 * int64(config.TasksPerEpoch)
+
+type poiss struct {
+	lam  *big.Int
+	pmf  *big.Int
+	icdf *big.Int
+
+	tmp *big.Int // temporary variable for optimization
+
+	k uint64
+}
+
+// newPoiss starts poisson inverted CDF
+// lambda is in Q.256 format
+// returns (instance, `1-poisscdf(0, lambda)`)
+// CDF value returend is reused when calling `next`
+func newPoiss(lambda *big.Int) (*poiss, *big.Int) {
+
+	// pmf(k) = (lambda^k)*(e^lambda) / k!
+	// k = 0 here, so it simplifies to just e^-lambda
+	elam := expneg(lambda) // Q.256
+	pmf := new(big.Int).Set(elam)
+
+	// icdf(k) = 1 - ∑ᵏᵢ₌₀ pmf(i)
+	// icdf(0) = 1 - pmf(0)
+	icdf := big.NewInt(1)
+	icdf = icdf.Lsh(icdf, precision) // Q.256
+	icdf = icdf.Sub(icdf, pmf)       // Q.256
+
+	k := uint64(0)
+
+	p := &poiss{
+		lam: lambda,
+		pmf: pmf,
+
+		tmp:  elam,
+		icdf: icdf,
+
+		k: k,
+	}
+
+	return p, icdf
+}
+
+// next computes `k++, 1-poisscdf(k, lam)`
+// return is in Q.256 format
+func (p *poiss) next() *big.Int {
+	// incrementally compute next pmf and icdf
+
+	// pmf(k) = (lambda^k)*(e^lambda) / k!
+	// so pmf(k) = pmf(k-1) * lambda / k
+	p.k++
+	p.tmp.SetUint64(p.k) // Q.0
+
+	// calculate pmf for k
+	p.pmf = p.pmf.Div(p.pmf, p.tmp) // Q.256 / Q.0 => Q.256
+	// we are using `tmp` as target for multiplication as using an input as output
+	// for Int.Mul causes allocations
+	p.tmp = p.tmp.Mul(p.pmf, p.lam)     // Q.256 * Q.256 => Q.512
+	p.pmf = p.pmf.Rsh(p.tmp, precision) // Q.512 >> 256 => Q.256
+
+	// calculate output
+	// icdf(k) = icdf(k-1) - pmf(k)
+	p.icdf = p.icdf.Sub(p.icdf, p.pmf) // Q.256
+	return p.icdf
+}
+
+// ComputeWinCount uses VRFProof to compute number of wins
+// The algorithm is based on Algorand's Sortition with Binomial distribution
+// replaced by Poisson distribution.
+func (ep *ElectionProof) ComputeWinCount(power BigInt, totalPower BigInt) int64 {
+	h := blake2b.Sum256(ep.VRFProof)
+
+	lhs := BigFromBytes(h[:]).Int // 256bits, assume Q.256 so [0, 1)
+
+	// We are calculating upside-down CDF of Poisson distribution with
+	// rate λ=power*E/totalPower
+	// Steps:
+	//  1. calculate λ=power*E/totalPower
+	//  2. calculate elam = exp(-λ)
+	//  3. Check how many times we win:
+	//    j = 0
+	//    pmf = elam
+	//    rhs = 1 - pmf
+	//    for h(vrf) < rhs: j++; pmf = pmf * lam / j; rhs = rhs - pmf
+
+	lam := lambda(power.Int, totalPower.Int) // Q.256
+
+	p, rhs := newPoiss(lam)
+
+	var j int64
+	for lhs.Cmp(rhs) < 0 && j < MaxWinCount {
+		rhs = p.next()
+		j++
+	}
+
+	return j
+}

types/electionproof_test.go

@@ -0,0 +1,145 @@
+package types
+
+import (
+	"bytes"
+	"fmt"
+	"math/big"
+	"os"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/xorcare/golden"
+)
+
+func TestPoissonFunction(t *testing.T) {
+	tests := []struct {
+		lambdaBase  uint64
+		lambdaShift uint
+	}{
+		{10, 10},      // 0.0097
+		{209714, 20},  // 0.19999885
+		{1036915, 20}, // 0.9888792038
+		{1706, 10},    // 1.6660
+		{2, 0},        // 2
+		{5242879, 20}, //4.9999990
+		{5, 0},        // 5
+	}
+
+	for _, test := range tests {
+		test := test
+		t.Run(fmt.Sprintf("lam-%d-%d", test.lambdaBase, test.lambdaShift), func(t *testing.T) {
+			b := &bytes.Buffer{}
+			b.WriteString("icdf\n")
+
+			lam := new(big.Int).SetUint64(test.lambdaBase)
+			lam = lam.Lsh(lam, precision-test.lambdaShift)
+			p, icdf := newPoiss(lam)
+
+			b.WriteString(icdf.String())
+			b.WriteRune('\n')
+
+			for i := 0; i < 15; i++ {
+				b.WriteString(p.next().String())
+				b.WriteRune('\n')
+			}
+			golden.Assert(t, b.Bytes())
+		})
+	}
+}
+
+func TestLambdaFunction(t *testing.T) {
+	tests := []struct {
+		power      string
+		totalPower string
+		target     float64
+	}{
+		{"10", "100", .1 * 5.},
+		{"1024", "2048", 0.5 * 5.},
+		{"2000000000000000", "100000000000000000", 0.02 * 5.},
+	}
+
+	for _, test := range tests {
+		test := test
+		t.Run(fmt.Sprintf("%s-%s", test.power, test.totalPower), func(t *testing.T) {
+			pow, ok := new(big.Int).SetString(test.power, 10)
+			assert.True(t, ok)
+			total, ok := new(big.Int).SetString(test.totalPower, 10)
+			assert.True(t, ok)
+			lam := lambda(pow, total)
+			assert.Equal(t, test.target, q256ToF(lam))
+			golden.Assert(t, []byte(lam.String()))
+		})
+	}
+}
+
+func TestExpFunction(t *testing.T) {
+	const N = 256
+
+	step := big.NewInt(5)
+	step = step.Lsh(step, 256) // Q.256
+	step = step.Div(step, big.NewInt(N-1))
+
+	x := big.NewInt(0)
+	b := &bytes.Buffer{}
+
+	b.WriteString("x, y\n")
+	for i := 0; i < N; i++ {
+		y := expneg(x)
+		fmt.Fprintf(b, "%s,%s\n", x, y)
+		x = x.Add(x, step)
+	}
+
+	golden.Assert(t, b.Bytes())
+}
+
+func q256ToF(x *big.Int) float64 {
+	deno := big.NewInt(1)
+	deno = deno.Lsh(deno, 256)
+	rat := new(big.Rat).SetFrac(x, deno)
+	f, _ := rat.Float64()
+	return f
+}
+
+func TestElectionLam(t *testing.T) {
+	p := big.NewInt(64)
+	tot := big.NewInt(128)
+	lam := lambda(p, tot)
+	target := 64. * 5. / 128.
+	if q256ToF(lam) != target {
+		t.Fatalf("wrong lambda: %f, should be: %f", q256ToF(lam), target)
+	}
+}
+
+var Res int64
+
+func BenchmarkWinCounts(b *testing.B) {
+	totalPower := NewInt(100)
+	power := NewInt(100)
+	ep := &ElectionProof{VRFProof: nil}
+	var res int64
+
+	b.ResetTimer()
+	b.ReportAllocs()
+	for i := 0; i < b.N; i++ {
+		ep.VRFProof = []byte{byte(i), byte(i >> 8), byte(i >> 16), byte(i >> 24), byte(i >> 32)}
+		j := ep.ComputeWinCount(power, totalPower)
+		res += j
+	}
+	Res += res
+}
+
+func TestWinCounts(t *testing.T) {
+	t.SkipNow()
+	totalPower := NewInt(100)
+	power := NewInt(30)
+
+	f, _ := os.Create("output.wins")
+	fmt.Fprintf(f, "wins\n")
+	ep := &ElectionProof{VRFProof: nil}
+	for i := uint64(0); i < 1000000; i++ {
+		i := i + 1000000
+		ep.VRFProof = []byte{byte(i), byte(i >> 8), byte(i >> 16), byte(i >> 24), byte(i >> 32)}
+		j := ep.ComputeWinCount(power, totalPower)
+		fmt.Fprintf(f, "%d\n", j)
+	}
+}

types/eth-denomination.go

@@ -0,0 +1,10 @@
+package types
+
+//	All ethereum values uses bit.Int
+//  to calculate Wei values in GWei:
+//	new(big.Int).Mul(value, big.NewInt(params.GWei))
+const (
+	Wei   = 1
+	GWei  = 1e9
+	Ether = 1e18
+)

types/keystore.go

@@ -0,0 +1,72 @@
+package types
+
+import (
+	"encoding/json"
+	"fmt"
+
+	"github.com/filecoin-project/go-state-types/crypto"
+	"github.com/sirupsen/logrus"
+)
+
+var (
+	ErrKeyInfoNotFound = fmt.Errorf("key info not found")
+	ErrKeyExists       = fmt.Errorf("key already exists")
+)
+
+// KeyType defines a type of a key
+type KeyType string
+
+const (
+	KTBLS       KeyType = "bls"
+	KTSecp256k1 KeyType = "secp256k1"
+)
+
+func (kt *KeyType) UnmarshalJSON(bb []byte) error {
+	{
+		// first option, try unmarshaling as string
+		var s string
+		err := json.Unmarshal(bb, &s)
+		if err == nil {
+			*kt = KeyType(s)
+			return nil
+		}
+	}
+
+	{
+		var b byte
+		err := json.Unmarshal(bb, &b)
+		if err != nil {
+			return fmt.Errorf("could not unmarshal KeyType either as string nor integer: %w", err)
+		}
+		bst := crypto.SigType(b)
+
+		switch bst {
+		case crypto.SigTypeBLS:
+			*kt = KTBLS
+		case crypto.SigTypeSecp256k1:
+			*kt = KTSecp256k1
+		default:
+			return fmt.Errorf("unknown sigtype: %d", bst)
+		}
+		logrus.Warn("deprecation: integer style 'KeyType' is deprecated, switch to string style")
+		return nil
+	}
+}
+
+// KeyInfo is used for storing keys in KeyStore
+type KeyInfo struct {
+	Type       KeyType
+	PrivateKey []byte
+}
+
+// KeyStore is used for storing secret keys
+type KeyStore interface {
+	// List lists all the keys stored in the KeyStore
+	List() ([]string, error)
+	// Get gets a key out of keystore and returns KeyInfo corresponding to named key
+	Get(string) (KeyInfo, error)
+	// Put saves a key info under given name
+	Put(string, KeyInfo) error
+	// Delete removes a key from keystore
+	Delete(string) error
+}

types/task.go

@@ -0,0 +1,31 @@
+package types
+
+import (
+	"strconv"
+
+	"github.com/Secured-Finance/dione/config"
+	"github.com/filecoin-project/go-address"
+	"github.com/filecoin-project/go-state-types/crypto"
+)
+
+//	TaskEpoch represents the timestamp of Task computed by the Dione miner
+type TaskEpoch int64
+
+func (e TaskEpoch) String() string {
+	return strconv.FormatInt(int64(e), 10)
+}
+
+//	DioneTask represents the values of task computation
+//	Miner is an address of miner node
+type DioneTask struct {
+	Miner         address.Address
+	Ticket        *Ticket
+	ElectionProof *ElectionProof
+	BeaconEntries []BeaconEntry
+	Signature     *crypto.Signature
+	Height        TaskEpoch
+}
+
+var tasksPerEpoch = NewInt(config.TasksPerEpoch)
+
+const sha256bits = 256

types/ticket.go

@@ -0,0 +1,21 @@
+package types
+
+import (
+	"math/big"
+
+	"github.com/minio/blake2b-simd"
+)
+
+type Ticket struct {
+	VRFProof []byte
+}
+
+func (t *Ticket) Quality() float64 {
+	ticketHash := blake2b.Sum256(t.VRFProof)
+	ticketNum := BigFromBytes(ticketHash[:]).Int
+	ticketDenu := big.NewInt(1)
+	ticketDenu.Lsh(ticketDenu, 256)
+	tv, _ := new(big.Rat).SetFrac(ticketNum, ticketDenu).Float64()
+	tq := 1 - tv
+	return tq
+}

wallet/key.go

@@ -0,0 +1,75 @@
+package wallet
+
+import (
+	"fmt"
+
+	"github.com/Secured-Finance/dione/types"
+	"github.com/filecoin-project/go-address"
+	"github.com/filecoin-project/go-state-types/crypto"
+	"github.com/filecoin-project/lotus/lib/sigs"
+)
+
+type Key struct {
+	types.KeyInfo
+
+	PublicKey []byte
+	Address   address.Address
+}
+
+func GenerateKey(typ types.KeyType) (*Key, error) {
+	ctyp := ActSigType(typ)
+	if ctyp == crypto.SigTypeUnknown {
+		return nil, fmt.Errorf("unknown sig type: %s", typ)
+	}
+	pk, err := sigs.Generate(ctyp)
+	if err != nil {
+		return nil, err
+	}
+	ki := types.KeyInfo{
+		Type:       typ,
+		PrivateKey: pk,
+	}
+	return NewKey(ki)
+}
+
+// NewKey generates a new Key based on private key and signature type
+// it works with both types of signatures Secp256k1 and BLS
+func NewKey(keyinfo types.KeyInfo) (*Key, error) {
+	k := &Key{
+		KeyInfo: keyinfo,
+	}
+
+	var err error
+	k.PublicKey, err = sigs.ToPublic(ActSigType(k.Type), k.PrivateKey)
+	if err != nil {
+		return nil, err
+	}
+
+	switch k.Type {
+	case types.KTSecp256k1:
+		k.Address, err = address.NewSecp256k1Address(k.PublicKey)
+		if err != nil {
+			return nil, fmt.Errorf("converting Secp256k1 to address: %w", err)
+		}
+	case types.KTBLS:
+		k.Address, err = address.NewBLSAddress(k.PublicKey)
+		if err != nil {
+			return nil, fmt.Errorf("converting BLS to address: %w", err)
+		}
+	default:
+		return nil, fmt.Errorf("unsupported key type: %s", k.Type)
+	}
+	return k, nil
+
+}
+
+func ActSigType(typ types.KeyType) crypto.SigType {
+	switch typ {
+	case types.KTBLS:
+		return crypto.SigTypeBLS
+	case types.KTSecp256k1:
+		return crypto.SigTypeSecp256k1
+	default:
+		return crypto.SigTypeUnknown
+	}
+}

wallet/memkeystore.go

@@ -0,0 +1,48 @@
+package wallet
+
+import (
+	"github.com/Secured-Finance/dione/types"
+)
+
+type MemKeyStore struct {
+	m map[string]types.KeyInfo
+}
+
+func NewMemKeyStore() *MemKeyStore {
+	return &MemKeyStore{
+		make(map[string]types.KeyInfo),
+	}
+}
+
+// List lists all the keys stored in the KeyStore
+func (mks *MemKeyStore) List() ([]string, error) {
+	var out []string
+	for k := range mks.m {
+		out = append(out, k)
+	}
+	return out, nil
+}
+
+// Get gets a key out of keystore and returns KeyInfo corresponding to named key
+func (mks *MemKeyStore) Get(k string) (types.KeyInfo, error) {
+	ki, ok := mks.m[k]
+	if !ok {
+		return types.KeyInfo{}, types.ErrKeyInfoNotFound
+	}
+
+	return ki, nil
+}
+
+// Put saves a key info under given name
+func (mks *MemKeyStore) Put(k string, ki types.KeyInfo) error {
+	mks.m[k] = ki
+	return nil
+}
+
+// Delete removes a key from keystore
+func (mks *MemKeyStore) Delete(k string) error {
+	delete(mks.m, k)
+	return nil
+}
+
+var _ (types.KeyStore) = (*MemKeyStore)(nil)

wallet/wallet.go

@@ -0,0 +1,187 @@
+package wallet
+
+import (
+	"context"
+	"sync"
+
+	"github.com/Secured-Finance/dione/lib/sigs"
+	"github.com/Secured-Finance/dione/types"
+	"github.com/filecoin-project/go-address"
+	"github.com/filecoin-project/go-state-types/crypto"
+	"github.com/sirupsen/logrus"
+	"golang.org/x/xerrors"
+)
+
+const (
+	KNamePrefix = "wallet-"
+	KDefault    = "default"
+)
+
+type LocalWallet struct {
+	keys     map[address.Address]*Key
+	keystore types.KeyStore
+
+	lk sync.Mutex
+}
+
+type Default interface {
+	GetDefault() (address.Address, error)
+}
+
+func NewWallet(keystore types.KeyStore) (*LocalWallet, error) {
+	w := &LocalWallet{
+		keys:     make(map[address.Address]*Key),
+		keystore: keystore,
+	}
+
+	return w, nil
+}
+
+func KeyWallet(keys ...*Key) *LocalWallet {
+	m := make(map[address.Address]*Key)
+	for _, key := range keys {
+		m[key.Address] = key
+	}
+
+	return &LocalWallet{
+		keys: m,
+	}
+}
+
+func (w *LocalWallet) WalletSign(ctx context.Context, addr address.Address, msg []byte) (*crypto.Signature, error) {
+	ki, err := w.findKey(addr)
+	if err != nil {
+		return nil, err
+	}
+	if ki == nil {
+		return nil, xerrors.Errorf("signing using key '%s': %w", addr.String(), types.ErrKeyInfoNotFound)
+	}
+
+	return sigs.Sign(ActSigType(ki.Type), ki.PrivateKey, msg)
+}
+
+func (w *LocalWallet) findKey(addr address.Address) (*Key, error) {
+	w.lk.Lock()
+	defer w.lk.Unlock()
+
+	k, ok := w.keys[addr]
+	if ok {
+		return k, nil
+	}
+	if w.keystore == nil {
+		logrus.Warn("findKey didn't find the key in in-memory wallet")
+		return nil, nil
+	}
+
+	ki, err := w.tryFind(addr)
+	if err != nil {
+		if xerrors.Is(err, types.ErrKeyInfoNotFound) {
+			return nil, nil
+		}
+		return nil, xerrors.Errorf("getting from keystore: %w", err)
+	}
+	k, err = NewKey(ki)
+	if err != nil {
+		return nil, xerrors.Errorf("decoding from keystore: %w", err)
+	}
+	w.keys[k.Address] = k
+	return k, nil
+}
+
+func (w *LocalWallet) tryFind(addr address.Address) (types.KeyInfo, error) {
+
+	ki, err := w.keystore.Get(KNamePrefix + addr.String())
+	if err == nil {
+		return ki, err
+	}
+
+	if !xerrors.Is(err, types.ErrKeyInfoNotFound) {
+		return types.KeyInfo{}, err
+	}
+
+	// We got an ErrKeyInfoNotFound error
+	// Try again, this time with the testnet prefix
+
+	tAddress, err := swapMainnetForTestnetPrefix(addr.String())
+	if err != nil {
+		return types.KeyInfo{}, err
+	}
+
+	ki, err = w.keystore.Get(KNamePrefix + tAddress)
+	if err != nil {
+		return types.KeyInfo{}, err
+	}
+
+	// We found it with the testnet prefix
+	// Add this KeyInfo with the mainnet prefix address string
+	err = w.keystore.Put(KNamePrefix+addr.String(), ki)
+	if err != nil {
+		return types.KeyInfo{}, err
+	}
+
+	return ki, nil
+}
+
+func (w *LocalWallet) GetDefault() (address.Address, error) {
+	w.lk.Lock()
+	defer w.lk.Unlock()
+
+	ki, err := w.keystore.Get(KDefault)
+	if err != nil {
+		return address.Undef, xerrors.Errorf("failed to get default key: %w", err)
+	}
+
+	k, err := NewKey(ki)
+	if err != nil {
+		return address.Undef, xerrors.Errorf("failed to read default key from keystore: %w", err)
+	}
+
+	return k.Address, nil
+}
+
+func (w *LocalWallet) WalletNew(ctx context.Context, typ types.KeyType) (address.Address, error) {
+	w.lk.Lock()
+	defer w.lk.Unlock()
+
+	k, err := GenerateKey(typ)
+	if err != nil {
+		return address.Undef, err
+	}
+
+	if err := w.keystore.Put(KNamePrefix+k.Address.String(), k.KeyInfo); err != nil {
+		return address.Undef, xerrors.Errorf("saving to keystore: %w", err)
+	}
+	w.keys[k.Address] = k
+
+	_, err = w.keystore.Get(KDefault)
+	if err != nil {
+		if !xerrors.Is(err, types.ErrKeyInfoNotFound) {
+			return address.Undef, err
+		}
+
+		if err := w.keystore.Put(KDefault, k.KeyInfo); err != nil {
+			return address.Undef, xerrors.Errorf("failed to set new key as default: %w", err)
+		}
+	}
+
+	return k.Address, nil
+}
+
+func (w *LocalWallet) WalletHas(ctx context.Context, addr address.Address) (bool, error) {
+	k, err := w.findKey(addr)
+	if err != nil {
+		return false, err
+	}
+	return k != nil, nil
+}
+
+func swapMainnetForTestnetPrefix(addr string) (string, error) {
+	aChars := []rune(addr)
+	prefixRunes := []rune(address.TestnetPrefix)
+	if len(prefixRunes) != 1 {
+		return "", xerrors.Errorf("unexpected prefix length: %d", len(prefixRunes))
+	}
+
+	aChars[0] = prefixRunes[0]
+	return string(aChars), nil
+}