chain: Use f2 code

chain/actors.go

@@ -0,0 +1,123 @@
+package chain
+
+import (
+	"context"
+	"fmt"
+	"github.com/filecoin-project/go-lotus/chain/address"
+
+	"github.com/ipfs/go-cid"
+	hamt "github.com/ipfs/go-hamt-ipld"
+	cbor "github.com/ipfs/go-ipld-cbor"
+	mh "github.com/multiformats/go-multihash"
+)
+
+func init() {
+	cbor.RegisterCborType(InitActorState{})
+	cbor.RegisterCborType(AccountActorState{})
+}
+
+var AccountActorCodeCid cid.Cid
+var StorageMarketActorCodeCid cid.Cid
+var StorageMinerCodeCid cid.Cid
+var MultisigActorCodeCid cid.Cid
+var InitActorCodeCid cid.Cid
+
+var InitActorAddress = mustIDAddress(0)
+var NetworkAddress = mustIDAddress(1)
+var StorageMarketAddress = mustIDAddress(2)
+
+func mustIDAddress(i uint64) address.Address {
+	a, err := address.NewIDAddress(i)
+	if err != nil {
+		panic(err)
+	}
+	return a
+}
+
+func init() {
+	pref := cid.NewPrefixV1(cid.Raw, mh.ID)
+	mustSum := func(s string) cid.Cid {
+		c, err := pref.Sum([]byte(s))
+		if err != nil {
+			panic(err)
+		}
+		return c
+	}
+
+	AccountActorCodeCid = mustSum("account")
+	StorageMarketActorCodeCid = mustSum("smarket")
+	StorageMinerCodeCid = mustSum("sminer")
+	MultisigActorCodeCid = mustSum("multisig")
+	InitActorCodeCid = mustSum("init")
+}
+
+type VMActor struct {
+}
+
+type InitActorState struct {
+	AddressMap cid.Cid
+
+	NextID uint64
+}
+
+func (ias *InitActorState) AddActor(vmctx *VMContext, addr address.Address) (address.Address, error) {
+	nid := ias.NextID
+	ias.NextID++
+
+	amap, err := hamt.LoadNode(context.TODO(), vmctx.Ipld(), ias.AddressMap)
+	if err != nil {
+		return address.Undef, err
+	}
+
+	if err := amap.Set(context.TODO(), string(addr.Bytes()), nid); err != nil {
+		return address.Undef, err
+	}
+
+	if err := amap.Flush(context.TODO()); err != nil {
+		return address.Undef, err
+	}
+
+	ncid, err := vmctx.Ipld().Put(context.TODO(), amap)
+	if err != nil {
+		return address.Undef, err
+	}
+	ias.AddressMap = ncid
+
+	return address.NewIDAddress(nid)
+}
+
+func (ias *InitActorState) Lookup(cst *hamt.CborIpldStore, addr address.Address) (address.Address, error) {
+	amap, err := hamt.LoadNode(context.TODO(), cst, ias.AddressMap)
+	if err != nil {
+		return address.Undef, err
+	}
+
+	val, err := amap.Find(context.TODO(), string(addr.Bytes()))
+	if err != nil {
+		return address.Undef, err
+	}
+
+	ival, ok := val.(uint64)
+	if !ok {
+		return address.Undef, fmt.Errorf("invalid value in init actor state, expected uint64, got %T", val)
+	}
+
+	return address.NewIDAddress(ival)
+}
+
+type AccountActorState struct {
+	Address address.Address
+}
+
+func DeductFunds(act *Actor, amt BigInt) error {
+	if BigCmp(act.Balance, amt) < 0 {
+		return fmt.Errorf("not enough funds")
+	}
+
+	act.Balance = BigSub(act.Balance, amt)
+	return nil
+}
+
+func DepositFunds(act *Actor, amt BigInt) {
+	act.Balance = BigAdd(act.Balance, amt)
+}

chain/address/address.go

@@ -0,0 +1,315 @@
+package address
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"strconv"
+	"strings"
+
+	"github.com/filecoin-project/go-filecoin/bls-signatures"
+
+	"github.com/filecoin-project/go-leb128"
+	cbor "github.com/ipfs/go-ipld-cbor"
+	"github.com/minio/blake2b-simd"
+	"github.com/polydawn/refmt/obj/atlas"
+)
+
+func init() {
+	cbor.RegisterCborType(addressAtlasEntry)
+}
+
+var addressAtlasEntry = atlas.BuildEntry(Address{}).Transform().
+	TransformMarshal(atlas.MakeMarshalTransformFunc(
+		func(a Address) ([]byte, error) {
+			return a.Bytes(), nil
+		})).
+	TransformUnmarshal(atlas.MakeUnmarshalTransformFunc(
+		func(x []byte) (Address, error) {
+			return NewFromBytes(x)
+		})).
+	Complete()
+
+// Address is the go type that represents an address in the filecoin network.
+type Address struct{ str string }
+
+// Undef is the type that represents an undefined address.
+var Undef = Address{}
+
+// Network represents which network an address belongs to.
+type Network = byte
+
+const (
+	// Mainnet is the main network.
+	Mainnet Network = iota
+	// Testnet is the test network.
+	Testnet
+)
+
+// MainnetPrefix is the main network prefix.
+const MainnetPrefix = "f"
+
+// TestnetPrefix is the main network prefix.
+const TestnetPrefix = "t"
+
+// Protocol represents which protocol an address uses.
+type Protocol = byte
+
+const (
+	// ID represents the address ID protocol.
+	ID Protocol = iota
+	// SECP256K1 represents the address SECP256K1 protocol.
+	SECP256K1
+	// Actor represents the address Actor protocol.
+	Actor
+	// BLS represents the address BLS protocol.
+	BLS
+)
+
+// Protocol returns the protocol used by the address.
+func (a Address) Protocol() Protocol {
+	return a.str[0]
+}
+
+// Payload returns the payload of the address.
+func (a Address) Payload() []byte {
+	return []byte(a.str[1:])
+}
+
+// Bytes returns the address as bytes.
+func (a Address) Bytes() []byte {
+	return []byte(a.str)
+}
+
+// String returns an address encoded as a string.
+func (a Address) String() string {
+	str, err := encode(Testnet, a)
+	if err != nil {
+		panic(err)
+	}
+	return str
+}
+
+// Empty returns true if the address is empty, false otherwise.
+func (a Address) Empty() bool {
+	return a == Undef
+}
+
+// Unmarshal unmarshals the cbor bytes into the address.
+func (a Address) Unmarshal(b []byte) error {
+	return cbor.DecodeInto(b, &a)
+}
+
+// Marshal marshals the address to cbor.
+func (a Address) Marshal() ([]byte, error) {
+	return cbor.DumpObject(a)
+}
+
+// UnmarshalJSON implements the json unmarshal interface.
+func (a *Address) UnmarshalJSON(b []byte) error {
+	in := strings.TrimSuffix(strings.TrimPrefix(string(b), `"`), `"`)
+	addr, err := decode(in)
+	if err != nil {
+		return err
+	}
+	*a = addr
+	return nil
+}
+
+// MarshalJSON implements the json marshal interface.
+func (a Address) MarshalJSON() ([]byte, error) {
+	return json.Marshal(a.String())
+}
+
+// Format implements the Formatter interface.
+func (a Address) Format(f fmt.State, c rune) {
+	switch c {
+	case 'v':
+		if a.Empty() {
+			fmt.Fprint(f, UndefAddressString) //nolint: errcheck
+		} else {
+			fmt.Fprintf(f, "[%x - %x]", a.Protocol(), a.Payload()) // nolint: errcheck
+		}
+	case 's':
+		fmt.Fprintf(f, "%s", a.String()) // nolint: errcheck
+	default:
+		fmt.Fprintf(f, "%"+string(c), a.Bytes()) // nolint: errcheck
+	}
+}
+
+// NewIDAddress returns an address using the ID protocol.
+func NewIDAddress(id uint64) (Address, error) {
+	return newAddress(ID, leb128.FromUInt64(id))
+}
+
+// NewSecp256k1Address returns an address using the SECP256K1 protocol.
+func NewSecp256k1Address(pubkey []byte) (Address, error) {
+	return newAddress(SECP256K1, addressHash(pubkey))
+}
+
+// NewActorAddress returns an address using the Actor protocol.
+func NewActorAddress(data []byte) (Address, error) {
+	return newAddress(Actor, addressHash(data))
+}
+
+// NewBLSAddress returns an address using the BLS protocol.
+func NewBLSAddress(pubkey []byte) (Address, error) {
+	return newAddress(BLS, pubkey)
+}
+
+// NewFromString returns the address represented by the string `addr`.
+func NewFromString(addr string) (Address, error) {
+	return decode(addr)
+}
+
+// NewFromBytes return the address represented by the bytes `addr`.
+func NewFromBytes(addr []byte) (Address, error) {
+	if len(addr) == 0 {
+		return Undef, nil
+	}
+	if len(addr) == 1 {
+		return Undef, ErrInvalidLength
+	}
+	return newAddress(addr[0], addr[1:])
+}
+
+// Checksum returns the checksum of `ingest`.
+func Checksum(ingest []byte) []byte {
+	return hash(ingest, checksumHashConfig)
+}
+
+// ValidateChecksum returns true if the checksum of `ingest` is equal to `expected`>
+func ValidateChecksum(ingest, expect []byte) bool {
+	digest := Checksum(ingest)
+	return bytes.Equal(digest, expect)
+}
+
+func addressHash(ingest []byte) []byte {
+	return hash(ingest, payloadHashConfig)
+}
+
+func newAddress(protocol Protocol, payload []byte) (Address, error) {
+	switch protocol {
+	case ID:
+	case SECP256K1, Actor:
+		if len(payload) != PayloadHashLength {
+			return Undef, ErrInvalidPayload
+		}
+	case BLS:
+		if len(payload) != bls.PublicKeyBytes {
+			return Undef, ErrInvalidPayload
+		}
+	default:
+		return Undef, ErrUnknownProtocol
+	}
+	explen := 1 + len(payload)
+	buf := make([]byte, explen)
+
+	buf[0] = protocol
+	copy(buf[1:], payload)
+
+	return Address{string(buf)}, nil
+}
+
+func encode(network Network, addr Address) (string, error) {
+	if addr == Undef {
+		return UndefAddressString, nil
+	}
+	var ntwk string
+	switch network {
+	case Mainnet:
+		ntwk = MainnetPrefix
+	case Testnet:
+		ntwk = TestnetPrefix
+	default:
+		return UndefAddressString, ErrUnknownNetwork
+	}
+
+	var strAddr string
+	switch addr.Protocol() {
+	case SECP256K1, Actor, BLS:
+		cksm := Checksum(append([]byte{addr.Protocol()}, addr.Payload()...))
+		strAddr = ntwk + fmt.Sprintf("%d", addr.Protocol()) + AddressEncoding.WithPadding(-1).EncodeToString(append(addr.Payload(), cksm[:]...))
+	case ID:
+		strAddr = ntwk + fmt.Sprintf("%d", addr.Protocol()) + fmt.Sprintf("%d", leb128.ToUInt64(addr.Payload()))
+	default:
+		return UndefAddressString, ErrUnknownProtocol
+	}
+	return strAddr, nil
+}
+
+func decode(a string) (Address, error) {
+	if len(a) == 0 {
+		return Undef, nil
+	}
+	if a == UndefAddressString {
+		return Undef, nil
+	}
+	if len(a) > MaxAddressStringLength || len(a) < 3 {
+		return Undef, ErrInvalidLength
+	}
+
+	if string(a[0]) != MainnetPrefix && string(a[0]) != TestnetPrefix {
+		return Undef, ErrUnknownNetwork
+	}
+
+	var protocol Protocol
+	switch a[1] {
+	case '0':
+		protocol = ID
+	case '1':
+		protocol = SECP256K1
+	case '2':
+		protocol = Actor
+	case '3':
+		protocol = BLS
+	default:
+		return Undef, ErrUnknownProtocol
+	}
+
+	raw := a[2:]
+	if protocol == ID {
+		// 20 is length of math.MaxUint64 as a string
+		if len(raw) > 20 {
+			return Undef, ErrInvalidLength
+		}
+		id, err := strconv.ParseUint(raw, 10, 64)
+		if err != nil {
+			return Undef, ErrInvalidPayload
+		}
+		return newAddress(protocol, leb128.FromUInt64(id))
+	}
+
+	payloadcksm, err := AddressEncoding.WithPadding(-1).DecodeString(raw)
+	if err != nil {
+		return Undef, err
+	}
+	payload := payloadcksm[:len(payloadcksm)-ChecksumHashLength]
+	cksm := payloadcksm[len(payloadcksm)-ChecksumHashLength:]
+
+	if protocol == SECP256K1 || protocol == Actor {
+		if len(payload) != 20 {
+			return Undef, ErrInvalidPayload
+		}
+	}
+
+	if !ValidateChecksum(append([]byte{protocol}, payload...), cksm) {
+		return Undef, ErrInvalidChecksum
+	}
+
+	return newAddress(protocol, payload)
+}
+
+func hash(ingest []byte, cfg *blake2b.Config) []byte {
+	hasher, err := blake2b.New(cfg)
+	if err != nil {
+		// If this happens sth is very wrong.
+		panic(fmt.Sprintf("invalid address hash configuration: %v", err))
+	}
+	if _, err := hasher.Write(ingest); err != nil {
+		// blake2bs Write implementation never returns an error in its current
+		// setup. So if this happens sth went very wrong.
+		panic(fmt.Sprintf("blake2b is unable to process hashes: %v", err))
+	}
+	return hasher.Sum(nil)
+}

chain/address/address_test.go

@@ -0,0 +1,448 @@
+package address
+
+import (
+	"encoding/base32"
+	"fmt"
+	"math"
+	"math/rand"
+	"strconv"
+	"testing"
+	"time"
+
+	"github.com/filecoin-project/go-leb128"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+
+	"github.com/filecoin-project/go-filecoin/bls-signatures"
+	"github.com/filecoin-project/go-filecoin/crypto"
+	tf "github.com/filecoin-project/go-filecoin/testhelpers/testflags"
+)
+
+func init() {
+	rand.Seed(time.Now().Unix())
+}
+
+func TestRandomIDAddress(t *testing.T) {
+	tf.UnitTest(t)
+
+	assert := assert.New(t)
+
+	addr, err := NewIDAddress(uint64(rand.Int()))
+	assert.NoError(err)
+	assert.Equal(ID, addr.Protocol())
+
+	str, err := encode(Testnet, addr)
+	assert.NoError(err)
+
+	maybe, err := decode(str)
+	assert.NoError(err)
+	assert.Equal(addr, maybe)
+
+}
+
+func TestVectorsIDAddress(t *testing.T) {
+	tf.UnitTest(t)
+
+	testCases := []struct {
+		input    uint64
+		expected string
+	}{
+		{uint64(0), "t00"},
+		{uint64(1), "t01"},
+		{uint64(10), "t010"},
+		{uint64(150), "t0150"},
+		{uint64(499), "t0499"},
+		{uint64(1024), "t01024"},
+		{uint64(1729), "t01729"},
+		{uint64(999999), "t0999999"},
+		{math.MaxUint64, fmt.Sprintf("t0%s", strconv.FormatUint(math.MaxUint64, 10))},
+	}
+
+	for _, tc := range testCases {
+		t.Run(fmt.Sprintf("testing actorID address: %s", tc.expected), func(t *testing.T) {
+			assert := assert.New(t)
+
+			// Round trip encoding and decoding from string
+			addr, err := NewIDAddress(tc.input)
+			assert.NoError(err)
+			assert.Equal(tc.expected, addr.String())
+
+			maybeAddr, err := NewFromString(tc.expected)
+			assert.NoError(err)
+			assert.Equal(ID, maybeAddr.Protocol())
+			assert.Equal(tc.input, leb128.ToUInt64(maybeAddr.Payload()))
+
+			// Round trip to and from bytes
+			maybeAddrBytes, err := NewFromBytes(maybeAddr.Bytes())
+			assert.NoError(err)
+			assert.Equal(maybeAddr, maybeAddrBytes)
+
+			// Round trip encoding and decoding json
+			b, err := addr.MarshalJSON()
+			assert.NoError(err)
+
+			var newAddr Address
+			err = newAddr.UnmarshalJSON(b)
+			assert.NoError(err)
+			assert.Equal(addr, newAddr)
+		})
+	}
+
+}
+
+func TestSecp256k1Address(t *testing.T) {
+	tf.UnitTest(t)
+
+	assert := assert.New(t)
+
+	sk, err := crypto.GenerateKey()
+	assert.NoError(err)
+
+	addr, err := NewSecp256k1Address(crypto.PublicKey(sk))
+	assert.NoError(err)
+	assert.Equal(SECP256K1, addr.Protocol())
+
+	str, err := encode(Mainnet, addr)
+	assert.NoError(err)
+
+	maybe, err := decode(str)
+	assert.NoError(err)
+	assert.Equal(addr, maybe)
+
+}
+
+func TestVectorSecp256k1Address(t *testing.T) {
+	tf.UnitTest(t)
+
+	testCases := []struct {
+		input    []byte
+		expected string
+	}{
+		{[]byte{4, 148, 2, 250, 195, 126, 100, 50, 164, 22, 163, 160, 202, 84,
+			38, 181, 24, 90, 179, 178, 79, 97, 52, 239, 162, 92, 228, 135, 200,
+			45, 46, 78, 19, 191, 69, 37, 17, 224, 210, 36, 84, 33, 248, 97, 59,
+			193, 13, 114, 250, 33, 102, 102, 169, 108, 59, 193, 57, 32, 211,
+			255, 35, 63, 208, 188, 5},
+			"t15ihq5ibzwki2b4ep2f46avlkrqzhpqgtga7pdrq"},
+
+		{[]byte{4, 118, 135, 185, 16, 55, 155, 242, 140, 190, 58, 234, 103, 75,
+			18, 0, 12, 107, 125, 186, 70, 255, 192, 95, 108, 148, 254, 42, 34,
+			187, 204, 38, 2, 255, 127, 92, 118, 242, 28, 165, 93, 54, 149, 145,
+			82, 176, 225, 232, 135, 145, 124, 57, 53, 118, 238, 240, 147, 246,
+			30, 189, 58, 208, 111, 127, 218},
+			"t12fiakbhe2gwd5cnmrenekasyn6v5tnaxaqizq6a"},
+		{[]byte{4, 222, 253, 208, 16, 1, 239, 184, 110, 1, 222, 213, 206, 52,
+			248, 71, 167, 58, 20, 129, 158, 230, 65, 188, 182, 11, 185, 41, 147,
+			89, 111, 5, 220, 45, 96, 95, 41, 133, 248, 209, 37, 129, 45, 172,
+			65, 99, 163, 150, 52, 155, 35, 193, 28, 194, 255, 53, 157, 229, 75,
+			226, 135, 234, 98, 49, 155},
+			"t1wbxhu3ypkuo6eyp6hjx6davuelxaxrvwb2kuwva"},
+		{[]byte{4, 3, 237, 18, 200, 20, 182, 177, 13, 46, 224, 157, 149, 180,
+			104, 141, 178, 209, 128, 208, 169, 163, 122, 107, 106, 125, 182, 61,
+			41, 129, 30, 233, 115, 4, 121, 216, 239, 145, 57, 233, 18, 73, 202,
+			189, 57, 50, 145, 207, 229, 210, 119, 186, 118, 222, 69, 227, 224,
+			133, 163, 118, 129, 191, 54, 69, 210},
+			"t1xtwapqc6nh4si2hcwpr3656iotzmlwumogqbuaa"},
+		{[]byte{4, 247, 150, 129, 154, 142, 39, 22, 49, 175, 124, 24, 151, 151,
+			181, 69, 214, 2, 37, 147, 97, 71, 230, 1, 14, 101, 98, 179, 206, 158,
+			254, 139, 16, 20, 65, 97, 169, 30, 208, 180, 236, 137, 8, 0, 37, 63,
+			166, 252, 32, 172, 144, 251, 241, 251, 242, 113, 48, 164, 236, 195,
+			228, 3, 183, 5, 118},
+			"t1xcbgdhkgkwht3hrrnui3jdopeejsoatkzmoltqy"},
+		{[]byte{4, 66, 131, 43, 248, 124, 206, 158, 163, 69, 185, 3, 80, 222,
+			125, 52, 149, 133, 156, 164, 73, 5, 156, 94, 136, 221, 231, 66, 133,
+			223, 251, 158, 192, 30, 186, 188, 95, 200, 98, 104, 207, 234, 235,
+			167, 174, 5, 191, 184, 214, 142, 183, 90, 82, 104, 120, 44, 248, 111,
+			200, 112, 43, 239, 138, 31, 224},
+			"t17uoq6tp427uzv7fztkbsnn64iwotfrristwpryy"},
+	}
+
+	for _, tc := range testCases {
+		t.Run(fmt.Sprintf("testing secp256k1 address: %s", tc.expected), func(t *testing.T) {
+			assert := assert.New(t)
+
+			// Round trip encoding and decoding from string
+			addr, err := NewSecp256k1Address(tc.input)
+			assert.NoError(err)
+			assert.Equal(tc.expected, addr.String())
+
+			maybeAddr, err := NewFromString(tc.expected)
+			assert.NoError(err)
+			assert.Equal(SECP256K1, maybeAddr.Protocol())
+			assert.Equal(addressHash(tc.input), maybeAddr.Payload())
+
+			// Round trip to and from bytes
+			maybeAddrBytes, err := NewFromBytes(maybeAddr.Bytes())
+			assert.NoError(err)
+			assert.Equal(maybeAddr, maybeAddrBytes)
+
+			// Round trip encoding and decoding json
+			b, err := addr.MarshalJSON()
+			assert.NoError(err)
+
+			var newAddr Address
+			err = newAddr.UnmarshalJSON(b)
+			assert.NoError(err)
+			assert.Equal(addr, newAddr)
+		})
+	}
+}
+
+func TestRandomActorAddress(t *testing.T) {
+	tf.UnitTest(t)
+
+	assert := assert.New(t)
+
+	actorMsg := make([]byte, 20)
+	rand.Read(actorMsg)
+
+	addr, err := NewActorAddress(actorMsg)
+	assert.NoError(err)
+	assert.Equal(Actor, addr.Protocol())
+
+	str, err := encode(Mainnet, addr)
+	assert.NoError(err)
+
+	maybe, err := decode(str)
+	assert.NoError(err)
+	assert.Equal(addr, maybe)
+
+}
+
+func TestVectorActorAddress(t *testing.T) {
+	tf.UnitTest(t)
+
+	testCases := []struct {
+		input    []byte
+		expected string
+	}{
+		{[]byte{118, 18, 129, 144, 205, 240, 104, 209, 65, 128, 68, 172, 192,
+			62, 11, 103, 129, 151, 13, 96},
+			"t24vg6ut43yw2h2jqydgbg2xq7x6f4kub3bg6as6i"},
+		{[]byte{44, 175, 184, 226, 224, 107, 186, 152, 234, 101, 124, 92, 245,
+			244, 32, 35, 170, 35, 232, 142},
+			"t25nml2cfbljvn4goqtclhifepvfnicv6g7mfmmvq"},
+		{[]byte{2, 44, 158, 14, 162, 157, 143, 64, 197, 106, 190, 195, 92, 141,
+			88, 125, 160, 166, 76, 24},
+			"t2nuqrg7vuysaue2pistjjnt3fadsdzvyuatqtfei"},
+		{[]byte{223, 236, 3, 14, 32, 79, 15, 89, 216, 15, 29, 94, 233, 29, 253,
+			6, 109, 127, 99, 189},
+			"t24dd4ox4c2vpf5vk5wkadgyyn6qtuvgcpxxon64a"},
+		{[]byte{61, 58, 137, 232, 221, 171, 84, 120, 50, 113, 108, 109, 70, 140,
+			53, 96, 201, 244, 127, 216},
+			"t2gfvuyh7v2sx3patm5k23wdzmhyhtmqctasbr23y"},
+	}
+
+	for _, tc := range testCases {
+		t.Run(fmt.Sprintf("testing Actor address: %s", tc.expected), func(t *testing.T) {
+			assert := assert.New(t)
+
+			// Round trip encoding and decoding from string
+			addr, err := NewActorAddress(tc.input)
+			assert.NoError(err)
+			assert.Equal(tc.expected, addr.String())
+
+			maybeAddr, err := NewFromString(tc.expected)
+			assert.NoError(err)
+			assert.Equal(Actor, maybeAddr.Protocol())
+			assert.Equal(addressHash(tc.input), maybeAddr.Payload())
+
+			// Round trip to and from bytes
+			maybeAddrBytes, err := NewFromBytes(maybeAddr.Bytes())
+			assert.NoError(err)
+			assert.Equal(maybeAddr, maybeAddrBytes)
+
+			// Round trip encoding and decoding json
+			b, err := addr.MarshalJSON()
+			assert.NoError(err)
+
+			var newAddr Address
+			err = newAddr.UnmarshalJSON(b)
+			assert.NoError(err)
+			assert.Equal(addr, newAddr)
+		})
+	}
+}
+
+func TestRandomBLSAddress(t *testing.T) {
+	tf.UnitTest(t)
+
+	assert := assert.New(t)
+
+	pk := bls.PrivateKeyPublicKey(bls.PrivateKeyGenerate())
+
+	addr, err := NewBLSAddress(pk[:])
+	assert.NoError(err)
+	assert.Equal(BLS, addr.Protocol())
+
+	str, err := encode(Mainnet, addr)
+	assert.NoError(err)
+
+	maybe, err := decode(str)
+	assert.NoError(err)
+	assert.Equal(addr, maybe)
+
+}
+
+func TestVectorBLSAddress(t *testing.T) {
+	tf.UnitTest(t)
+
+	testCases := []struct {
+		input    []byte
+		expected string
+	}{
+		{[]byte{173, 88, 223, 105, 110, 45, 78, 145, 234, 134, 200, 129, 233, 56,
+			186, 78, 168, 27, 57, 94, 18, 121, 123, 132, 185, 207, 49, 75, 149, 70,
+			112, 94, 131, 156, 122, 153, 214, 6, 178, 71, 221, 180, 249, 172, 122,
+			52, 20, 221},
+			"t3vvmn62lofvhjd2ugzca6sof2j2ubwok6cj4xxbfzz4yuxfkgobpihhd2thlanmsh3w2ptld2gqkn2jvlss4a"},
+		{[]byte{179, 41, 79, 10, 46, 41, 224, 198, 110, 188, 35, 93, 47, 237,
+			202, 86, 151, 191, 120, 74, 246, 5, 199, 90, 246, 8, 230, 166, 61, 92,
+			211, 142, 168, 92, 168, 152, 158, 14, 253, 233, 24, 139, 56, 47,
+			147, 114, 70, 13},
+			"t3wmuu6crofhqmm3v4enos73okk2l366ck6yc4owxwbdtkmpk42ohkqxfitcpa57pjdcftql4tojda2poeruwa"},
+		{[]byte{150, 161, 163, 228, 234, 122, 20, 212, 153, 133, 230, 97, 178,
+			36, 1, 212, 79, 237, 64, 45, 29, 9, 37, 178, 67, 201, 35, 88, 156,
+			15, 188, 126, 50, 205, 4, 226, 158, 215, 141, 21, 211, 125, 58, 170,
+			63, 230, 218, 51},
+			"t3s2q2hzhkpiknjgmf4zq3ejab2rh62qbndueslmsdzervrhapxr7dftie4kpnpdiv2n6tvkr743ndhrsw6d3a"},
+		{[]byte{134, 180, 84, 37, 140, 88, 148, 117, 247, 209, 111, 90, 172, 1,
+			138, 121, 246, 193, 22, 157, 32, 252, 51, 146, 29, 216, 181, 206, 28,
+			172, 108, 52, 143, 144, 163, 96, 54, 36, 246, 174, 185, 27, 100, 81,
+			140, 46, 128, 149},
+			"t3q22fijmmlckhl56rn5nkyamkph3mcfu5ed6dheq53c244hfmnq2i7efdma3cj5voxenwiummf2ajlsbxc65a"},
+		{[]byte{167, 114, 107, 3, 128, 34, 247, 90, 56, 70, 23, 88, 83, 96, 206,
+			230, 41, 7, 10, 45, 157, 40, 113, 41, 101, 229, 242, 110, 204, 64,
+			133, 131, 130, 128, 55, 36, 237, 52, 242, 114, 3, 54, 240, 157, 182,
+			49, 240, 116},
+			"t3u5zgwa4ael3vuocgc5mfgygo4yuqocrntuuhcklf4xzg5tcaqwbyfabxetwtj4tsam3pbhnwghyhijr5mixa"},
+	}
+
+	for _, tc := range testCases {
+		t.Run(fmt.Sprintf("testing bls address: %s", tc.expected), func(t *testing.T) {
+			assert := assert.New(t)
+
+			// Round trip encoding and decoding from string
+			addr, err := NewBLSAddress(tc.input)
+			assert.NoError(err)
+			assert.Equal(tc.expected, addr.String())
+
+			maybeAddr, err := NewFromString(tc.expected)
+			assert.NoError(err)
+			assert.Equal(BLS, maybeAddr.Protocol())
+			assert.Equal(tc.input, maybeAddr.Payload())
+
+			// Round trip to and from bytes
+			maybeAddrBytes, err := NewFromBytes(maybeAddr.Bytes())
+			assert.NoError(err)
+			assert.Equal(maybeAddr, maybeAddrBytes)
+
+			// Round trip encoding and decoding json
+			b, err := addr.MarshalJSON()
+			assert.NoError(err)
+
+			var newAddr Address
+			err = newAddr.UnmarshalJSON(b)
+			assert.NoError(err)
+			assert.Equal(addr, newAddr)
+		})
+	}
+}
+
+func TestInvalidStringAddresses(t *testing.T) {
+	tf.UnitTest(t)
+
+	testCases := []struct {
+		input    string
+		expetErr error
+	}{
+		{"Q2gfvuyh7v2sx3patm5k23wdzmhyhtmqctasbr23y", ErrUnknownNetwork},
+		{"t4gfvuyh7v2sx3patm5k23wdzmhyhtmqctasbr23y", ErrUnknownProtocol},
+		{"t2gfvuyh7v2sx3patm5k23wdzmhyhtmqctasbr24y", ErrInvalidChecksum},
+		{"t0banananananannnnnnnnn", ErrInvalidLength},
+		{"t0banananananannnnnnnn", ErrInvalidPayload},
+		{"t2gfvuyh7v2sx3patm1k23wdzmhyhtmqctasbr24y", base32.CorruptInputError(16)}, // '1' is not in base32 alphabet
+		{"t2gfvuyh7v2sx3paTm1k23wdzmhyhtmqctasbr24y", base32.CorruptInputError(14)}, // 'T' is not in base32 alphabet
+		{"t2", ErrInvalidLength},
+	}
+
+	for _, tc := range testCases {
+		t.Run(fmt.Sprintf("testing string address: %s", tc.expetErr), func(t *testing.T) {
+			assert := assert.New(t)
+
+			_, err := NewFromString(tc.input)
+			assert.Equal(tc.expetErr, err)
+		})
+	}
+
+}
+
+func TestInvalidByteAddresses(t *testing.T) {
+	tf.UnitTest(t)
+
+	testCases := []struct {
+		input    []byte
+		expetErr error
+	}{
+		// Unknown Protocol
+		{[]byte{4, 4, 4}, ErrUnknownProtocol},
+
+		// ID protocol
+		{[]byte{0}, ErrInvalidLength},
+
+		// SECP256K1 Protocol
+		{append([]byte{1}, make([]byte, PayloadHashLength-1)...), ErrInvalidPayload},
+		{append([]byte{1}, make([]byte, PayloadHashLength+1)...), ErrInvalidPayload},
+		// Actor Protocol
+		{append([]byte{2}, make([]byte, PayloadHashLength-1)...), ErrInvalidPayload},
+		{append([]byte{2}, make([]byte, PayloadHashLength+1)...), ErrInvalidPayload},
+
+		// BLS Protocol
+		{append([]byte{3}, make([]byte, bls.PublicKeyBytes-1)...), ErrInvalidPayload},
+		{append([]byte{3}, make([]byte, bls.PrivateKeyBytes+1)...), ErrInvalidPayload},
+	}
+
+	for _, tc := range testCases {
+		t.Run(fmt.Sprintf("testing byte address: %s", tc.expetErr), func(t *testing.T) {
+			assert := assert.New(t)
+
+			_, err := NewFromBytes(tc.input)
+			assert.Equal(tc.expetErr, err)
+		})
+	}
+
+}
+
+func TestChecksum(t *testing.T) {
+	tf.UnitTest(t)
+
+	assert := assert.New(t)
+
+	data := []byte("helloworld")
+	bata := []byte("kittinmittins")
+
+	cksm := Checksum(data)
+	assert.Len(cksm, ChecksumHashLength)
+
+	assert.True(ValidateChecksum(data, cksm))
+	assert.False(ValidateChecksum(bata, cksm))
+
+}
+
+func TestAddressFormat(t *testing.T) {
+	tf.UnitTest(t)
+
+	assert := assert.New(t)
+	require := require.New(t)
+
+	a, err := NewActorAddress([]byte("hello"))
+	require.NoError(err)
+
+	assert.Equal("t2wvjry4bx6bwj6kkhcmvgu5zafqyi5cjzbtet3va", a.String())
+	assert.Equal("02B5531C7037F06C9F2947132A6A77202C308E8939", fmt.Sprintf("%X", a))
+	assert.Equal("[2 - b5531c7037f06c9f2947132a6a77202c308e8939]", fmt.Sprintf("%v", a))
+
+	assert.Equal("", fmt.Sprintf("%X", Undef))
+	assert.Equal(UndefAddressString, Undef.String())
+	assert.Equal(UndefAddressString, fmt.Sprintf("%v", Undef))
+}

chain/address/constants.go

@@ -0,0 +1,88 @@
+package address
+
+
+import (
+	"encoding/base32"
+
+	"github.com/minio/blake2b-simd"
+	errors "github.com/pkg/errors"
+)
+
+func init() {
+
+	var err error
+
+	TestAddress, err = NewActorAddress([]byte("satoshi"))
+	if err != nil {
+		panic(err)
+	}
+
+	TestAddress2, err = NewActorAddress([]byte("nakamoto"))
+	if err != nil {
+		panic(err)
+	}
+
+	NetworkAddress, err = NewActorAddress([]byte("filecoin"))
+	if err != nil {
+		panic(err)
+	}
+
+	StorageMarketAddress, err = NewActorAddress([]byte("storage"))
+	if err != nil {
+		panic(err)
+	}
+
+	PaymentBrokerAddress, err = NewActorAddress([]byte("payments"))
+	if err != nil {
+		panic(err)
+	}
+}
+
+var (
+	// TestAddress is an account with some initial funds in it.
+	TestAddress Address
+	// TestAddress2 is an account with some initial funds in it.
+	TestAddress2 Address
+
+	// NetworkAddress is the filecoin network.
+	NetworkAddress Address
+	// StorageMarketAddress is the hard-coded address of the filecoin storage market.
+	StorageMarketAddress Address
+	// PaymentBrokerAddress is the hard-coded address of the filecoin storage market.
+	PaymentBrokerAddress Address
+)
+
+var (
+	// ErrUnknownNetwork is returned when encountering an unknown network in an address.
+	ErrUnknownNetwork = errors.New("unknown address network")
+
+	// ErrUnknownProtocol is returned when encountering an unknown protocol in an address.
+	ErrUnknownProtocol = errors.New("unknown address protocol")
+	// ErrInvalidPayload is returned when encountering an invalid address payload.
+	ErrInvalidPayload = errors.New("invalid address payload")
+	// ErrInvalidLength is returned when encountering an address of invalid length.
+	ErrInvalidLength = errors.New("invalid address length")
+	// ErrInvalidChecksum is returned when encountering an invalid address checksum.
+	ErrInvalidChecksum = errors.New("invalid address checksum")
+)
+
+// UndefAddressString is the string used to represent an empty address when encoded to a string.
+var UndefAddressString = "empty"
+
+// PayloadHashLength defines the hash length taken over addresses using the Actor and SECP256K1 protocols.
+const PayloadHashLength = 20
+
+// ChecksumHashLength defines the hash length used for calculating address checksums.
+const ChecksumHashLength = 4
+
+// MaxAddressStringLength is the max length of an address encoded as a string
+// it include the network prefx, protocol, and bls publickey
+const MaxAddressStringLength = 2 + 84
+
+var payloadHashConfig = &blake2b.Config{Size: PayloadHashLength}
+var checksumHashConfig = &blake2b.Config{Size: ChecksumHashLength}
+
+const encodeStd = "abcdefghijklmnopqrstuvwxyz234567"
+
+// AddressEncoding defines the base32 config used for address encoding and decoding.
+var AddressEncoding = base32.NewEncoding(encodeStd)

chain/address/testing.go

@@ -0,0 +1,20 @@
+package address
+
+import (
+	"fmt"
+)
+
+// NewForTestGetter returns a closure that returns an address unique to that invocation.
+// The address is unique wrt the closure returned, not globally.
+func NewForTestGetter() func() Address {
+	i := 0
+	return func() Address {
+		s := fmt.Sprintf("address%d", i)
+		i++
+		newAddr, err := NewActorAddress([]byte(s))
+		if err != nil {
+			panic(err)
+		}
+		return newAddr
+	}
+}

chain/blocksync.go

@@ -0,0 +1,431 @@
+package chain
+
+
+import (
+	"bufio"
+	"context"
+	"fmt"
+	"math/rand"
+	"sync"
+
+	"github.com/ipfs/go-bitswap"
+	"github.com/ipfs/go-cid"
+	cbor "github.com/ipfs/go-ipld-cbor"
+	inet "github.com/libp2p/go-libp2p-core/network"
+	"github.com/libp2p/go-libp2p-peer"
+	//"github.com/libp2p/go-libp2p-protocol"
+)
+
+const BlockSyncProtocolID = "/fil/sync/blk/0.0.1"
+
+func init() {
+	cbor.RegisterCborType(BlockSyncRequest{})
+	cbor.RegisterCborType(BlockSyncResponse{})
+	cbor.RegisterCborType(BSTipSet{})
+}
+
+type BlockSyncService struct {
+	cs *ChainStore
+}
+
+type BlockSyncRequest struct {
+	Start         []cid.Cid
+	RequestLength uint64
+
+	Options uint64
+}
+
+type BSOptions struct {
+	IncludeBlocks   bool
+	IncludeMessages bool
+}
+
+func ParseBSOptions(optfield uint64) *BSOptions {
+	return &BSOptions{
+		IncludeBlocks:   optfield&(BSOptBlocks) != 0,
+		IncludeMessages: optfield&(BSOptMessages) != 0,
+	}
+}
+
+const (
+	BSOptBlocks   = 1 << 0
+	BSOptMessages = 1 << 1
+)
+
+type BlockSyncResponse struct {
+	Chain []*BSTipSet
+
+	Status  uint
+	Message string
+}
+
+type BSTipSet struct {
+	Blocks []*BlockHeader
+
+	Messages    []*SignedMessage
+	MsgIncludes [][]int
+}
+
+func NewBlockSyncService(cs *ChainStore) *BlockSyncService {
+	return &BlockSyncService{
+		cs: cs,
+	}
+}
+
+func (bss *BlockSyncService) HandleStream(s inet.Stream) {
+	defer s.Close()
+	log.Error("handling block sync request")
+
+	var req BlockSyncRequest
+	if err := ReadCborRPC(bufio.NewReader(s), &req); err != nil {
+		log.Errorf("failed to read block sync request: %s", err)
+		return
+	}
+	log.Errorf("block sync request for: %s %d", req.Start, req.RequestLength)
+
+	resp, err := bss.processRequest(&req)
+	if err != nil {
+		log.Error("failed to process block sync request: ", err)
+		return
+	}
+
+	if err := WriteCborRPC(s, resp); err != nil {
+		log.Error("failed to write back response for handle stream: ", err)
+		return
+	}
+}
+
+func (bss *BlockSyncService) processRequest(req *BlockSyncRequest) (*BlockSyncResponse, error) {
+	opts := ParseBSOptions(req.Options)
+	chain, err := bss.collectChainSegment(req.Start, req.RequestLength, opts)
+	if err != nil {
+		log.Error("encountered error while responding to block sync request: ", err)
+		return &BlockSyncResponse{
+			Status: 203,
+		}, nil
+	}
+
+	return &BlockSyncResponse{
+		Chain:  chain,
+		Status: 0,
+	}, nil
+}
+
+func (bss *BlockSyncService) collectChainSegment(start []cid.Cid, length uint64, opts *BSOptions) ([]*BSTipSet, error) {
+	var bstips []*BSTipSet
+	cur := start
+	for {
+		var bst BSTipSet
+		ts, err := bss.cs.LoadTipSet(cur)
+		if err != nil {
+			return nil, err
+		}
+
+		if opts.IncludeMessages {
+			log.Error("INCLUDING MESSAGES IN SYNC RESPONSE")
+			msgs, mincl, err := bss.gatherMessages(ts)
+			if err != nil {
+				return nil, err
+			}
+			log.Errorf("messages: ", msgs)
+
+			bst.Messages = msgs
+			bst.MsgIncludes = mincl
+		}
+
+		if opts.IncludeBlocks {
+			log.Error("INCLUDING BLOCKS IN SYNC RESPONSE")
+			bst.Blocks = ts.Blocks()
+		}
+
+		bstips = append(bstips, &bst)
+
+		if uint64(len(bstips)) >= length || ts.Height() == 0 {
+			return bstips, nil
+		}
+
+		cur = ts.Parents()
+	}
+}
+
+func (bss *BlockSyncService) gatherMessages(ts *TipSet) ([]*SignedMessage, [][]int, error) {
+	msgmap := make(map[cid.Cid]int)
+	var allmsgs []*SignedMessage
+	var msgincl [][]int
+
+	for _, b := range ts.Blocks() {
+		msgs, err := bss.cs.MessagesForBlock(b)
+		if err != nil {
+			return nil, nil, err
+		}
+		log.Errorf("MESSAGES FOR BLOCK: %d", len(msgs))
+
+		msgindexes := make([]int, 0, len(msgs))
+		for _, m := range msgs {
+			i, ok := msgmap[m.Cid()]
+			if !ok {
+				i = len(allmsgs)
+				allmsgs = append(allmsgs, m)
+				msgmap[m.Cid()] = i
+			}
+
+			msgindexes = append(msgindexes, i)
+		}
+		msgincl = append(msgincl, msgindexes)
+	}
+
+	return allmsgs, msgincl, nil
+}
+
+type BlockSync struct {
+	bswap     *bitswap.Bitswap
+	newStream NewStreamFunc
+
+	syncPeersLk sync.Mutex
+	syncPeers   map[peer.ID]struct{}
+}
+
+func NewBlockSyncClient(bswap *bitswap.Bitswap, newStreamF NewStreamFunc) *BlockSync {
+	return &BlockSync{
+		bswap:     bswap,
+		newStream: newStreamF,
+		syncPeers: make(map[peer.ID]struct{}),
+	}
+}
+
+func (bs *BlockSync) getPeers() []peer.ID {
+	bs.syncPeersLk.Lock()
+	defer bs.syncPeersLk.Unlock()
+	var out []peer.ID
+	for p := range bs.syncPeers {
+		out = append(out, p)
+	}
+	return out
+}
+
+func (bs *BlockSync) GetBlocks(ctx context.Context, tipset []cid.Cid, count int) ([]*TipSet, error) {
+	peers := bs.getPeers()
+	perm := rand.Perm(len(peers))
+	// TODO: round robin through these peers on error
+
+	req := &BlockSyncRequest{
+		Start:         tipset,
+		RequestLength: uint64(count),
+		Options:       BSOptBlocks,
+	}
+
+	res, err := bs.sendRequestToPeer(ctx, peers[perm[0]], req)
+	if err != nil {
+		return nil, err
+	}
+
+	switch res.Status {
+	case 0: // Success
+		return bs.processBlocksResponse(req, res)
+	case 101: // Partial Response
+		panic("not handled")
+	case 201: // req.Start not found
+		return nil, fmt.Errorf("not found")
+	case 202: // Go Away
+		panic("not handled")
+	case 203: // Internal Error
+		return nil, fmt.Errorf("block sync peer errored: %s", res.Message)
+	default:
+		return nil, fmt.Errorf("unrecognized response code")
+	}
+}
+
+func (bs *BlockSync) GetFullTipSet(ctx context.Context, p peer.ID, h []cid.Cid) (*FullTipSet, error) {
+	// TODO: round robin through these peers on error
+
+	req := &BlockSyncRequest{
+		Start:         h,
+		RequestLength: 1,
+		Options:       BSOptBlocks | BSOptMessages,
+	}
+
+	res, err := bs.sendRequestToPeer(ctx, p, req)
+	if err != nil {
+		return nil, err
+	}
+
+	switch res.Status {
+	case 0: // Success
+		if len(res.Chain) == 0 {
+			return nil, fmt.Errorf("got zero length chain response")
+		}
+		bts := res.Chain[0]
+
+		return bstsToFullTipSet(bts)
+	case 101: // Partial Response
+		panic("not handled")
+	case 201: // req.Start not found
+		return nil, fmt.Errorf("not found")
+	case 202: // Go Away
+		panic("not handled")
+	case 203: // Internal Error
+		return nil, fmt.Errorf("block sync peer errored: %s", res.Message)
+	default:
+		return nil, fmt.Errorf("unrecognized response code")
+	}
+}
+
+func (bs *BlockSync) GetChainMessages(ctx context.Context, h *TipSet, count uint64) ([]*BSTipSet, error) {
+	peers := bs.getPeers()
+	perm := rand.Perm(len(peers))
+	// TODO: round robin through these peers on error
+
+	req := &BlockSyncRequest{
+		Start:         h.Cids(),
+		RequestLength: count,
+		Options:       BSOptMessages,
+	}
+
+	res, err := bs.sendRequestToPeer(ctx, peers[perm[0]], req)
+	if err != nil {
+		return nil, err
+	}
+
+	switch res.Status {
+	case 0: // Success
+		return res.Chain, nil
+	case 101: // Partial Response
+		panic("not handled")
+	case 201: // req.Start not found
+		return nil, fmt.Errorf("not found")
+	case 202: // Go Away
+		panic("not handled")
+	case 203: // Internal Error
+		return nil, fmt.Errorf("block sync peer errored: %s", res.Message)
+	default:
+		return nil, fmt.Errorf("unrecognized response code")
+	}
+}
+
+func bstsToFullTipSet(bts *BSTipSet) (*FullTipSet, error) {
+	fts := &FullTipSet{}
+	for i, b := range bts.Blocks {
+		fb := &FullBlock{
+			Header: b,
+		}
+		for _, mi := range bts.MsgIncludes[i] {
+			fb.Messages = append(fb.Messages, bts.Messages[mi])
+		}
+		fts.Blocks = append(fts.Blocks, fb)
+	}
+
+	return fts, nil
+}
+
+func (bs *BlockSync) sendRequestToPeer(ctx context.Context, p peer.ID, req *BlockSyncRequest) (*BlockSyncResponse, error) {
+	s, err := bs.newStream(inet.WithNoDial(ctx, "should already have connection"), p, BlockSyncProtocolID)
+	if err != nil {
+		return nil, err
+	}
+
+	if err := WriteCborRPC(s, req); err != nil {
+		return nil, err
+	}
+
+	var res BlockSyncResponse
+	if err := ReadCborRPC(bufio.NewReader(s), &res); err != nil {
+		return nil, err
+	}
+
+	return &res, nil
+}
+
+func (bs *BlockSync) processBlocksResponse(req *BlockSyncRequest, res *BlockSyncResponse) ([]*TipSet, error) {
+	cur, err := NewTipSet(res.Chain[0].Blocks)
+	if err != nil {
+		return nil, err
+	}
+
+	out := []*TipSet{cur}
+	for bi := 1; bi < len(res.Chain); bi++ {
+		next := res.Chain[bi].Blocks
+		nts, err := NewTipSet(next)
+		if err != nil {
+			return nil, err
+		}
+
+		if !cidArrsEqual(cur.Parents(), nts.Cids()) {
+			return nil, fmt.Errorf("parents of tipset[%d] were not tipset[%d]", bi-1, bi)
+		}
+
+		out = append(out, nts)
+		cur = nts
+	}
+	return out, nil
+}
+
+func cidArrsEqual(a, b []cid.Cid) bool {
+	if len(a) != len(b) {
+		return false
+	}
+	for i, v := range a {
+		if b[i] != v {
+			return false
+		}
+	}
+	return true
+}
+
+func (bs *BlockSync) GetBlock(ctx context.Context, c cid.Cid) (*BlockHeader, error) {
+	sb, err := bs.bswap.GetBlock(ctx, c)
+	if err != nil {
+		return nil, err
+	}
+
+	return DecodeBlock(sb.RawData())
+}
+
+func (bs *BlockSync) AddPeer(p peer.ID) {
+	bs.syncPeersLk.Lock()
+	defer bs.syncPeersLk.Unlock()
+	bs.syncPeers[p] = struct{}{}
+}
+
+func (bs *BlockSync) FetchMessagesByCids(cids []cid.Cid) ([]*SignedMessage, error) {
+	out := make([]*SignedMessage, len(cids))
+
+	resp, err := bs.bswap.GetBlocks(context.TODO(), cids)
+	if err != nil {
+		return nil, err
+	}
+
+	m := make(map[cid.Cid]int)
+	for i, c := range cids {
+		m[c] = i
+	}
+
+	for i := 0; i < len(cids); i++ {
+		select {
+		case v, ok := <-resp:
+			if !ok {
+				if i == len(cids)-1 {
+					break
+				}
+
+				return nil, fmt.Errorf("failed to fetch all messages")
+			}
+
+			sm, err := DecodeSignedMessage(v.RawData())
+			if err != nil {
+				return nil, err
+			}
+			ix, ok := m[sm.Cid()]
+			if !ok {
+				return nil, fmt.Errorf("received message we didnt ask for")
+			}
+
+			if out[ix] != nil {
+				return nil, fmt.Errorf("received duplicate message")
+			}
+
+			out[ix] = sm
+		}
+	}
+
+	return out, nil
+}

chain/buf_bstore.go

@@ -0,0 +1,117 @@
+package chain
+
+import (
+	"context"
+
+	block "github.com/ipfs/go-block-format"
+	"github.com/ipfs/go-cid"
+	ds "github.com/ipfs/go-datastore"
+	bstore "github.com/ipfs/go-ipfs-blockstore"
+)
+
+type BufferedBS struct {
+	read  bstore.Blockstore
+	write bstore.Blockstore
+}
+
+func NewBufferedBstore(base bstore.Blockstore) *BufferedBS {
+	buf := bstore.NewBlockstore(ds.NewMapDatastore())
+	return &BufferedBS{
+		read:  base,
+		write: buf,
+	}
+}
+
+var _ (bstore.Blockstore) = &BufferedBS{}
+
+func (bs *BufferedBS) AllKeysChan(ctx context.Context) (<-chan cid.Cid, error) {
+	a, err := bs.read.AllKeysChan(ctx)
+	if err != nil {
+		return nil, err
+	}
+
+	b, err := bs.write.AllKeysChan(ctx)
+	if err != nil {
+		return nil, err
+	}
+
+	out := make(chan cid.Cid)
+	go func() {
+		defer close(out)
+		for a != nil || b != nil {
+			select {
+			case val, ok := <-a:
+				if !ok {
+					a = nil
+				} else {
+					select {
+					case out <- val:
+					case <-ctx.Done():
+						return
+					}
+				}
+			case val, ok := <-b:
+				if !ok {
+					b = nil
+				} else {
+					select {
+					case out <- val:
+					case <-ctx.Done():
+						return
+					}
+				}
+			}
+		}
+	}()
+
+	return out, nil
+}
+
+func (bs *BufferedBS) DeleteBlock(c cid.Cid) error {
+	if err := bs.read.DeleteBlock(c); err != nil {
+		return err
+	}
+
+	return bs.write.DeleteBlock(c)
+}
+
+func (bs *BufferedBS) Get(c cid.Cid) (block.Block, error) {
+	if out, err := bs.read.Get(c); err != nil {
+		if err != bstore.ErrNotFound {
+			return nil, err
+		}
+	} else {
+		return out, nil
+	}
+
+	return bs.write.Get(c)
+}
+
+func (bs *BufferedBS) GetSize(c cid.Cid) (int, error) {
+	panic("nyi")
+}
+
+func (bs *BufferedBS) Put(blk block.Block) error {
+	return bs.write.Put(blk)
+}
+
+func (bs *BufferedBS) Has(c cid.Cid) (bool, error) {
+	has, err := bs.read.Has(c)
+	if err != nil {
+		return false, err
+	}
+	if has {
+		return true, nil
+	}
+
+	return bs.write.Has(c)
+}
+
+func (bs *BufferedBS) HashOnRead(hor bool) {
+	bs.read.HashOnRead(hor)
+	bs.write.HashOnRead(hor)
+}
+
+func (bs *BufferedBS) PutMany(blks []block.Block) error {
+	return bs.write.PutMany(blks)
+}

chain/chain.go

@@ -0,0 +1,459 @@
+package chain
+
+import (
+	"context"
+	"fmt"
+	"github.com/filecoin-project/go-lotus/chain/address"
+	"sync"
+
+	"github.com/ipfs/go-cid"
+	datastore "github.com/ipfs/go-datastore"
+	dstore "github.com/ipfs/go-datastore"
+	hamt "github.com/ipfs/go-hamt-ipld"
+	bstore "github.com/ipfs/go-ipfs-blockstore"
+	logging "github.com/ipfs/go-log"
+	"github.com/pkg/errors"
+	sharray "github.com/whyrusleeping/sharray"
+	pubsub "github.com/whyrusleeping/pubsub"
+)
+
+const ForkLengthThreshold = 20
+
+var log = logging.Logger("f2")
+
+type GenesisBootstrap struct {
+	Genesis  *BlockHeader
+	MinerKey address.Address
+}
+
+func SetupInitActor(bs bstore.Blockstore, addrs []address.Address) (*Actor, error) {
+	var ias InitActorState
+	ias.NextID = 100
+
+	cst := hamt.CSTFromBstore(bs)
+	amap := hamt.NewNode(cst)
+
+	for i, a := range addrs {
+		if err := amap.Set(context.TODO(), string(a.Bytes()), 100+uint64(i)); err != nil {
+			return nil, err
+		}
+	}
+
+	ias.NextID += uint64(len(addrs))
+	if err := amap.Flush(context.TODO()); err != nil {
+		return nil, err
+	}
+	amapcid, err := cst.Put(context.TODO(), amap)
+	if err != nil {
+		return nil, err
+	}
+
+	ias.AddressMap = amapcid
+
+	statecid, err := cst.Put(context.TODO(), &ias)
+	if err != nil {
+		return nil, err
+	}
+
+	act := &Actor{
+		Code: InitActorCodeCid,
+		Head: statecid,
+	}
+
+	return act, nil
+}
+
+func init() {
+	bs := bstore.NewBlockstore(dstore.NewMapDatastore())
+	cst := hamt.CSTFromBstore(bs)
+	emptyobject, err := cst.Put(context.TODO(), map[string]string{})
+	if err != nil {
+		panic(err)
+	}
+
+	EmptyObjectCid = emptyobject
+}
+
+var EmptyObjectCid cid.Cid
+
+func MakeGenesisBlock(bs bstore.Blockstore, w *Wallet) (*GenesisBootstrap, error) {
+	cst := hamt.CSTFromBstore(bs)
+	state, err := NewStateTree(cst)
+	if err != nil {
+		return nil, err
+	}
+
+	emptyobject, err := cst.Put(context.TODO(), map[string]string{})
+	if err != nil {
+		return nil, err
+	}
+
+	minerAddr, err := w.GenerateKey(KTSecp256k1)
+	if err != nil {
+		return nil, err
+	}
+
+	initact, err := SetupInitActor(bs, []address.Address{minerAddr})
+	if err != nil {
+		return nil, err
+	}
+
+	if err := state.SetActor(InitActorAddress, initact); err != nil {
+		return nil, err
+	}
+
+	err = state.SetActor(NetworkAddress, &Actor{
+		Code:    AccountActorCodeCid,
+		Balance: NewInt(100000000000),
+		Head:    emptyobject,
+	})
+	if err != nil {
+		return nil, err
+	}
+
+	err = state.SetActor(minerAddr, &Actor{
+		Code:    AccountActorCodeCid,
+		Balance: NewInt(5000000),
+		Head:    emptyobject,
+	})
+	if err != nil {
+		return nil, err
+	}
+	fmt.Println("about to flush state...")
+
+	stateroot, err := state.Flush()
+	if err != nil {
+		return nil, err
+	}
+	fmt.Println("at end of make genesis block")
+
+	emptyroot, err := sharray.Build(context.TODO(), 4, []interface{}{}, cst)
+	if err != nil {
+		return nil, err
+	}
+	fmt.Println("Empty genesis root: ", emptyroot)
+
+	b := &BlockHeader{
+		Miner:           InitActorAddress,
+		Tickets:         []Ticket{},
+		ElectionProof:   []byte("the genesis block"),
+		Parents:         []cid.Cid{},
+		Height:          0,
+		ParentWeight:    NewInt(0),
+		StateRoot:       stateroot,
+		Messages:        emptyroot,
+		MessageReceipts: emptyroot,
+	}
+
+	sb, err := b.ToStorageBlock()
+	if err != nil {
+		return nil, err
+	}
+
+	if err := bs.Put(sb); err != nil {
+		return nil, err
+	}
+
+	return &GenesisBootstrap{
+		Genesis:  b,
+		MinerKey: minerAddr,
+	}, nil
+}
+
+type ChainStore struct {
+	bs bstore.Blockstore
+	ds datastore.Datastore
+
+	heaviestLk sync.Mutex
+	heaviest   *TipSet
+
+	bestTips *pubsub.PubSub
+
+	headChange func(rev, app []*TipSet) error
+}
+
+func NewChainStore(bs bstore.Blockstore, ds datastore.Datastore) *ChainStore {
+	return &ChainStore{
+		bs:       bs,
+		ds:       ds,
+		bestTips: pubsub.New(64),
+	}
+}
+
+func (cs *ChainStore) SubNewTips() chan interface{} {
+	return cs.bestTips.Sub("best")
+}
+
+func (cs *ChainStore) SetGenesis(b *BlockHeader) error {
+	gents, err := NewTipSet([]*BlockHeader{b})
+	if err != nil {
+		return err
+	}
+
+	fts := &FullTipSet{
+		Blocks: []*FullBlock{
+			{Header: b},
+		},
+	}
+
+	cs.heaviest = gents
+
+	if err := cs.PutTipSet(fts); err != nil {
+		return err
+	}
+
+	return cs.ds.Put(datastore.NewKey("0"), b.Cid().Bytes())
+}
+
+func (cs *ChainStore) PutTipSet(ts *FullTipSet) error {
+	for _, b := range ts.Blocks {
+		if err := cs.persistBlock(b); err != nil {
+			return err
+		}
+	}
+
+	cs.maybeTakeHeavierTipSet(ts.TipSet())
+	return nil
+}
+
+func (cs *ChainStore) maybeTakeHeavierTipSet(ts *TipSet) error {
+	cs.heaviestLk.Lock()
+	defer cs.heaviestLk.Unlock()
+	if cs.heaviest == nil || cs.Weight(ts) > cs.Weight(cs.heaviest) {
+		revert, apply, err := cs.ReorgOps(cs.heaviest, ts)
+		if err != nil {
+			return err
+		}
+		cs.headChange(revert, apply)
+		log.Errorf("New heaviest tipset! %s", ts.Cids())
+		cs.heaviest = ts
+	}
+	return nil
+}
+
+func (cs *ChainStore) Contains(ts *TipSet) (bool, error) {
+	for _, c := range ts.cids {
+		has, err := cs.bs.Has(c)
+		if err != nil {
+			return false, err
+		}
+
+		if !has {
+			return false, nil
+		}
+	}
+	return true, nil
+}
+
+func (cs *ChainStore) GetBlock(c cid.Cid) (*BlockHeader, error) {
+	sb, err := cs.bs.Get(c)
+	if err != nil {
+		return nil, err
+	}
+
+	return DecodeBlock(sb.RawData())
+}
+
+func (cs *ChainStore) LoadTipSet(cids []cid.Cid) (*TipSet, error) {
+	var blks []*BlockHeader
+	for _, c := range cids {
+		b, err := cs.GetBlock(c)
+		if err != nil {
+			return nil, err
+		}
+
+		blks = append(blks, b)
+	}
+
+	return NewTipSet(blks)
+}
+
+// returns true if 'a' is an ancestor of 'b'
+func (cs *ChainStore) IsAncestorOf(a, b *TipSet) (bool, error) {
+	if b.Height() <= a.Height() {
+		return false, nil
+	}
+
+	cur := b
+	for !a.Equals(cur) && cur.Height() > a.Height() {
+		next, err := cs.LoadTipSet(b.Parents())
+		if err != nil {
+			return false, err
+		}
+
+		cur = next
+	}
+
+	return cur.Equals(a), nil
+}
+
+func (cs *ChainStore) NearestCommonAncestor(a, b *TipSet) (*TipSet, error) {
+	l, _, err := cs.ReorgOps(a, b)
+	if err != nil {
+		return nil, err
+	}
+
+	return cs.LoadTipSet(l[len(l)-1].Parents())
+}
+
+func (cs *ChainStore) ReorgOps(a, b *TipSet) ([]*TipSet, []*TipSet, error) {
+	left := a
+	right := b
+
+	var leftChain, rightChain []*TipSet
+	for !left.Equals(right) {
+		if left.Height() > right.Height() {
+			leftChain = append(leftChain, left)
+			par, err := cs.LoadTipSet(left.Parents())
+			if err != nil {
+				return nil, nil, err
+			}
+
+			left = par
+		} else {
+			rightChain = append(rightChain, right)
+			par, err := cs.LoadTipSet(right.Parents())
+			if err != nil {
+				return nil, nil, err
+			}
+
+			right = par
+		}
+	}
+
+	return leftChain, rightChain, nil
+}
+
+func (cs *ChainStore) Weight(ts *TipSet) uint64 {
+	return ts.Blocks()[0].ParentWeight.Uint64() + uint64(len(ts.Cids()))
+}
+
+func (cs *ChainStore) GetHeaviestTipSet() *TipSet {
+	cs.heaviestLk.Lock()
+	defer cs.heaviestLk.Unlock()
+	return cs.heaviest
+}
+
+func (cs *ChainStore) persistBlockHeader(b *BlockHeader) error {
+	sb, err := b.ToStorageBlock()
+	if err != nil {
+		return err
+	}
+
+	return cs.bs.Put(sb)
+}
+
+func (cs *ChainStore) persistBlock(b *FullBlock) error {
+	if err := cs.persistBlockHeader(b.Header); err != nil {
+		return err
+	}
+
+	for _, m := range b.Messages {
+		if err := cs.PutMessage(m); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func (cs *ChainStore) PutMessage(m *SignedMessage) error {
+	sb, err := m.ToStorageBlock()
+	if err != nil {
+		return err
+	}
+
+	return cs.bs.Put(sb)
+}
+
+func (cs *ChainStore) AddBlock(b *BlockHeader) error {
+	if err := cs.persistBlockHeader(b); err != nil {
+		return err
+	}
+
+	ts, _ := NewTipSet([]*BlockHeader{b})
+	cs.maybeTakeHeavierTipSet(ts)
+
+	return nil
+}
+
+func (cs *ChainStore) GetGenesis() (*BlockHeader, error) {
+	data, err := cs.ds.Get(datastore.NewKey("0"))
+	if err != nil {
+		return nil, err
+	}
+
+	c, err := cid.Cast(data)
+	if err != nil {
+		return nil, err
+	}
+
+	genb, err := cs.bs.Get(c)
+	if err != nil {
+		return nil, err
+	}
+
+	return DecodeBlock(genb.RawData())
+}
+
+func (cs *ChainStore) TipSetState(cids []cid.Cid) (cid.Cid, error) {
+	ts, err := cs.LoadTipSet(cids)
+	if err != nil {
+		log.Error("failed loading tipset: ", cids)
+		return cid.Undef, err
+	}
+
+	if len(ts.Blocks()) == 1 {
+		return ts.Blocks()[0].StateRoot, nil
+	}
+
+	panic("cant handle multiblock tipsets yet")
+
+}
+
+func (cs *ChainStore) GetMessage(c cid.Cid) (*SignedMessage, error) {
+	sb, err := cs.bs.Get(c)
+	if err != nil {
+		return nil, err
+	}
+
+	return DecodeSignedMessage(sb.RawData())
+}
+
+func (cs *ChainStore) MessagesForBlock(b *BlockHeader) ([]*SignedMessage, error) {
+	cst := hamt.CSTFromBstore(cs.bs)
+	shar, err := sharray.Load(context.TODO(), b.Messages, 4, cst)
+	if err != nil {
+		return nil, errors.Wrap(err, "sharray load")
+	}
+
+	var cids []cid.Cid
+	err = shar.ForEach(context.TODO(), func(i interface{}) error {
+		c, ok := i.(cid.Cid)
+		if !ok {
+			return fmt.Errorf("value in message sharray was not a cid")
+		}
+
+		cids = append(cids, c)
+		return nil
+	})
+	if err != nil {
+		return nil, err
+	}
+
+	return cs.LoadMessagesFromCids(cids)
+}
+
+func (cs *ChainStore) LoadMessagesFromCids(cids []cid.Cid) ([]*SignedMessage, error) {
+	msgs := make([]*SignedMessage, 0, len(cids))
+	for _, c := range cids {
+		m, err := cs.GetMessage(c)
+		if err != nil {
+			return nil, err
+		}
+
+		msgs = append(msgs, m)
+	}
+
+	return msgs, nil
+}
+

chain/statetree.go

@@ -0,0 +1,256 @@
+package chain
+
+
+import (
+	"context"
+	"fmt"
+	"github.com/filecoin-project/go-lotus/chain/address"
+
+	"github.com/ipfs/go-cid"
+	hamt "github.com/ipfs/go-hamt-ipld"
+	cbor "github.com/ipfs/go-ipld-cbor"
+)
+
+var ErrActorNotFound = fmt.Errorf("actor not found")
+
+type StateTree struct {
+	root  *hamt.Node
+	store *hamt.CborIpldStore
+
+	actorcache map[address.Address]*Actor
+	snapshot   cid.Cid
+}
+
+func NewStateTree(cst *hamt.CborIpldStore) (*StateTree, error) {
+	return &StateTree{
+		root:       hamt.NewNode(cst),
+		store:      cst,
+		actorcache: make(map[address.Address]*Actor),
+	}, nil
+}
+
+func LoadStateTree(cst *hamt.CborIpldStore, c cid.Cid) (*StateTree, error) {
+	nd, err := hamt.LoadNode(context.Background(), cst, c)
+	if err != nil {
+		log.Errorf("loading hamt node failed: %s", err)
+		return nil, err
+	}
+
+	return &StateTree{
+		root:       nd,
+		store:      cst,
+		actorcache: make(map[address.Address]*Actor),
+	}, nil
+}
+
+func (st *StateTree) SetActor(addr address.Address, act *Actor) error {
+	if addr.Protocol() != address.ID {
+		iaddr, err := st.lookupID(addr)
+		if err != nil {
+			return err
+		}
+		addr = iaddr
+	}
+
+	cact, ok := st.actorcache[addr]
+	if ok {
+		if act == cact {
+			return nil
+		}
+	}
+
+	return st.root.Set(context.TODO(), string(addr.Bytes()), act)
+}
+
+func (st *StateTree) lookupID(addr address.Address) (address.Address, error) {
+	act, err := st.GetActor(InitActorAddress)
+	if err != nil {
+		return address.Undef, err
+	}
+
+	var ias InitActorState
+	if err := st.store.Get(context.TODO(), act.Head, &ias); err != nil {
+		return address.Undef, err
+	}
+
+	return ias.Lookup(st.store, addr)
+}
+
+func (st *StateTree) GetActor(addr address.Address) (*Actor, error) {
+	if addr.Protocol() != address.ID {
+		iaddr, err := st.lookupID(addr)
+		if err != nil {
+			if err == hamt.ErrNotFound {
+				return nil, ErrActorNotFound
+			}
+			return nil, err
+		}
+		addr = iaddr
+	}
+
+	cact, ok := st.actorcache[addr]
+	if ok {
+		return cact, nil
+	}
+
+	thing, err := st.root.Find(context.TODO(), string(addr.Bytes()))
+	if err != nil {
+		if err == hamt.ErrNotFound {
+			return nil, ErrActorNotFound
+		}
+		return nil, err
+	}
+
+	var act Actor
+	badout, err := cbor.DumpObject(thing)
+	if err != nil {
+		return nil, err
+	}
+
+	if err := cbor.DecodeInto(badout, &act); err != nil {
+		return nil, err
+	}
+
+	st.actorcache[addr] = &act
+
+	return &act, nil
+}
+
+func (st *StateTree) Flush() (cid.Cid, error) {
+	for addr, act := range st.actorcache {
+		if err := st.root.Set(context.TODO(), string(addr.Bytes()), act); err != nil {
+			return cid.Undef, err
+		}
+	}
+	st.actorcache = make(map[address.Address]*Actor)
+
+	if err := st.root.Flush(context.TODO()); err != nil {
+		return cid.Undef, err
+	}
+
+	return st.store.Put(context.TODO(), st.root)
+}
+
+func (st *StateTree) Snapshot() error {
+	ss, err := st.Flush()
+	if err != nil {
+		return err
+	}
+
+	st.snapshot = ss
+	return nil
+}
+
+func (st *StateTree) RegisterNewAddress(addr address.Address, act *Actor) (address.Address, error) {
+	var out address.Address
+	err := st.MutateActor(InitActorAddress, func(initact *Actor) error {
+		var ias InitActorState
+		if err := st.store.Get(context.TODO(), initact.Head, &ias); err != nil {
+			return err
+		}
+
+		fvm := &VMContext{cst: st.store}
+		oaddr, err := ias.AddActor(fvm, addr)
+		if err != nil {
+			return err
+		}
+		out = oaddr
+
+		ncid, err := st.store.Put(context.TODO(), &ias)
+		if err != nil {
+			return err
+		}
+
+		initact.Head = ncid
+		return nil
+	})
+	if err != nil {
+		return address.Undef, err
+	}
+
+	if err := st.SetActor(out, act); err != nil {
+		return address.Undef, err
+	}
+
+	return out, nil
+}
+
+func (st *StateTree) Revert() error {
+	nd, err := hamt.LoadNode(context.Background(), st.store, st.snapshot)
+	if err != nil {
+		return err
+	}
+
+	st.root = nd
+	return nil
+}
+
+func (st *StateTree) MutateActor(addr address.Address, f func(*Actor) error) error {
+	act, err := st.GetActor(addr)
+	if err != nil {
+		return err
+	}
+
+	if err := f(act); err != nil {
+		return err
+	}
+
+	return st.SetActor(addr, act)
+}
+
+func NewBLSAccountActor(st *StateTree, addr address.Address) (*Actor, error) {
+	var acstate AccountActorState
+	acstate.Address = addr
+
+	c, err := st.store.Put(context.TODO(), acstate)
+	if err != nil {
+		return nil, err
+	}
+
+	nact := &Actor{
+		Code:    AccountActorCodeCid,
+		Balance: NewInt(0),
+		Head:    c,
+	}
+
+	return nact, nil
+}
+
+func NewSecp256k1AccountActor(st *StateTree, addr address.Address) (*Actor, error) {
+	nact := &Actor{
+		Code:    AccountActorCodeCid,
+		Balance: NewInt(0),
+		Head:    EmptyObjectCid,
+	}
+
+	return nact, nil
+}
+
+func TryCreateAccountActor(st *StateTree, addr address.Address) (*Actor, error) {
+	act, err := makeActor(st, addr)
+	if err != nil {
+		return nil, err
+	}
+
+	_, err = st.RegisterNewAddress(addr, act)
+	if err != nil {
+		return nil, err
+	}
+
+	return act, nil
+}
+
+func makeActor(st *StateTree, addr address.Address) (*Actor, error) {
+	switch addr.Protocol() {
+	case address.BLS:
+		return NewBLSAccountActor(st, addr)
+	case address.SECP256K1:
+		return NewSecp256k1AccountActor(st, addr)
+	case address.ID:
+		return nil, fmt.Errorf("no actor with given ID")
+	case address.Actor:
+		return nil, fmt.Errorf("no such actor")
+	default:
+		return nil, fmt.Errorf("address has unsupported protocol: %d", addr.Protocol())
+	}
+}

chain/sync.go

@@ -0,0 +1,696 @@
+package chain
+
+
+import (
+	"context"
+	"fmt"
+	"sync"
+
+	"github.com/ipfs/go-cid"
+	dstore "github.com/ipfs/go-datastore"
+	"github.com/ipfs/go-hamt-ipld"
+	bstore "github.com/ipfs/go-ipfs-blockstore"
+	peer "github.com/libp2p/go-libp2p-peer"
+	"github.com/pkg/errors"
+	"github.com/whyrusleeping/sharray"
+)
+
+type Syncer struct {
+	// The heaviest known tipset in the network.
+	head *TipSet
+
+	// The interface for accessing and putting tipsets into local storage
+	store *ChainStore
+
+	// The known genesis tipset
+	genesis *TipSet
+
+	// the current mode the syncer is in
+	syncMode SyncMode
+
+	syncLock sync.Mutex
+
+	// TipSets known to be invalid
+	bad BadTipSetCache
+
+	// handle to the block sync service
+	bsync *BlockSync
+
+	// peer heads
+	// Note: clear cache on disconnects
+	peerHeads   map[peer.ID]*TipSet
+	peerHeadsLk sync.Mutex
+}
+
+func NewSyncer(cs *ChainStore, bsync *BlockSync) (*Syncer, error) {
+	gen, err := cs.GetGenesis()
+	if err != nil {
+		return nil, err
+	}
+
+	gent, err := NewTipSet([]*BlockHeader{gen})
+	if err != nil {
+		return nil, err
+	}
+
+	return &Syncer{
+		syncMode:  Bootstrap,
+		genesis:   gent,
+		bsync:     bsync,
+		peerHeads: make(map[peer.ID]*TipSet),
+		head:      cs.GetHeaviestTipSet(),
+		store:     cs,
+	}, nil
+}
+
+type SyncMode int
+
+const (
+	Unknown = SyncMode(iota)
+	Bootstrap
+	CaughtUp
+)
+
+type BadTipSetCache struct {
+	badBlocks map[cid.Cid]struct{}
+}
+
+type BlockSet struct {
+	tset map[uint64]*TipSet
+	head *TipSet
+}
+
+func (bs *BlockSet) Insert(ts *TipSet) {
+	if bs.tset == nil {
+		bs.tset = make(map[uint64]*TipSet)
+	}
+
+	if bs.head == nil || ts.Height() > bs.head.Height() {
+		bs.head = ts
+	}
+	bs.tset[ts.Height()] = ts
+}
+
+func (bs *BlockSet) GetByHeight(h uint64) *TipSet {
+	return bs.tset[h]
+}
+
+func (bs *BlockSet) PersistTo(cs *ChainStore) error {
+	for _, ts := range bs.tset {
+		for _, b := range ts.Blocks() {
+			if err := cs.persistBlockHeader(b); err != nil {
+				return err
+			}
+		}
+	}
+	return nil
+}
+
+func (bs *BlockSet) Head() *TipSet {
+	return bs.head
+}
+
+const BootstrapPeerThreshold = 1
+
+// InformNewHead informs the syncer about a new potential tipset
+// This should be called when connecting to new peers, and additionally
+// when receiving new blocks from the network
+func (syncer *Syncer) InformNewHead(from peer.ID, fts *FullTipSet) {
+	if fts == nil {
+		panic("bad")
+	}
+	syncer.peerHeadsLk.Lock()
+	syncer.peerHeads[from] = fts.TipSet()
+	syncer.peerHeadsLk.Unlock()
+	syncer.bsync.AddPeer(from)
+
+	go func() {
+		syncer.syncLock.Lock()
+		defer syncer.syncLock.Unlock()
+
+		switch syncer.syncMode {
+		case Bootstrap:
+			syncer.SyncBootstrap()
+		case CaughtUp:
+			if err := syncer.SyncCaughtUp(fts); err != nil {
+				log.Errorf("sync error: %s", err)
+			}
+		case Unknown:
+			panic("invalid syncer state")
+		}
+	}()
+}
+
+func (syncer *Syncer) GetPeers() []peer.ID {
+	syncer.peerHeadsLk.Lock()
+	defer syncer.peerHeadsLk.Unlock()
+	var out []peer.ID
+	for p, _ := range syncer.peerHeads {
+		out = append(out, p)
+	}
+	return out
+}
+
+func (syncer *Syncer) InformNewBlock(from peer.ID, blk *FullBlock) {
+	// TODO: search for other blocks that could form a tipset with this block
+	// and then send that tipset to InformNewHead
+
+	fts := &FullTipSet{Blocks: []*FullBlock{blk}}
+	syncer.InformNewHead(from, fts)
+}
+
+// SyncBootstrap is used to synchronise your chain when first joining
+// the network, or when rejoining after significant downtime.
+func (syncer *Syncer) SyncBootstrap() {
+	fmt.Println("Sync bootstrap!")
+	defer fmt.Println("bye bye sync bootstrap")
+	ctx := context.Background()
+
+	if syncer.syncMode == CaughtUp {
+		log.Errorf("Called SyncBootstrap while in caught up mode")
+		return
+	}
+
+	selectedHead, err := syncer.selectHead(syncer.peerHeads)
+	if err != nil {
+		log.Error("failed to select head: ", err)
+		return
+	}
+
+	blockSet := []*TipSet{selectedHead}
+	cur := selectedHead.Cids()
+	for /* would be cool to have a terminating condition maybe */ {
+		// NB: GetBlocks validates that the blocks are in-fact the ones we
+		// requested, and that they are correctly linked to eachother. It does
+		// not validate any state transitions
+		fmt.Println("Get blocks: ", cur)
+		blks, err := syncer.bsync.GetBlocks(context.TODO(), cur, 10)
+		if err != nil {
+			log.Error("failed to get blocks: ", err)
+			return
+		}
+
+		for _, b := range blks {
+			blockSet = append(blockSet, b)
+		}
+		if blks[len(blks)-1].Height() == 0 {
+			break
+		}
+
+		cur = blks[len(blks)-1].Parents()
+	}
+
+	// hacks. in the case that we request X blocks starting at height X+1, we
+	// won't get the genesis block in the returned blockset. This hacks around it
+	if blockSet[len(blockSet)-1].Height() != 0 {
+		blockSet = append(blockSet, syncer.genesis)
+	}
+
+	blockSet = reverse(blockSet)
+
+	genesis := blockSet[0]
+	if !genesis.Equals(syncer.genesis) {
+		// TODO: handle this...
+		log.Errorf("We synced to the wrong chain! %s != %s", genesis, syncer.genesis)
+		return
+	}
+
+	for _, ts := range blockSet {
+		for _, b := range ts.Blocks() {
+			if err := syncer.store.persistBlockHeader(b); err != nil {
+				log.Errorf("failed to persist synced blocks to the chainstore: %s", err)
+				return
+			}
+		}
+	}
+
+	// Fetch all the messages for all the blocks in this chain
+
+	windowSize := uint64(10)
+	for i := uint64(0); i <= selectedHead.Height(); i += windowSize {
+		bs := bstore.NewBlockstore(dstore.NewMapDatastore())
+		cst := hamt.CSTFromBstore(bs)
+
+		nextHeight := i + windowSize - 1
+		if nextHeight > selectedHead.Height() {
+			nextHeight = selectedHead.Height()
+		}
+
+		next := blockSet[nextHeight]
+		bstips, err := syncer.bsync.GetChainMessages(ctx, next, (nextHeight+1)-i)
+		if err != nil {
+			log.Errorf("failed to fetch messages: %s", err)
+			return
+		}
+
+		for bsi := 0; bsi < len(bstips); bsi++ {
+			cur := blockSet[i+uint64(bsi)]
+			bstip := bstips[len(bstips)-(bsi+1)]
+			fmt.Println("that loop: ", bsi, len(bstips))
+			fts, err := zipTipSetAndMessages(cst, cur, bstip.Messages, bstip.MsgIncludes)
+			if err != nil {
+				log.Error("zipping failed: ", err, bsi, i)
+				log.Error("height: ", selectedHead.Height())
+				log.Error("bstips: ", bstips)
+				log.Error("next height: ", nextHeight)
+				return
+			}
+
+			if err := syncer.ValidateTipSet(fts); err != nil {
+				log.Errorf("failed to validate tipset: %s", err)
+				return
+			}
+		}
+
+		for _, bst := range bstips {
+			for _, m := range bst.Messages {
+				if _, err := cst.Put(context.TODO(), m); err != nil {
+					log.Error("failed to persist messages: ", err)
+					return
+				}
+			}
+		}
+
+		if err := copyBlockstore(bs, syncer.store.bs); err != nil {
+			log.Errorf("failed to persist temp blocks: %s", err)
+			return
+		}
+	}
+
+	head := blockSet[len(blockSet)-1]
+	log.Errorf("Finished syncing! new head: %s", head.Cids())
+	syncer.store.maybeTakeHeavierTipSet(selectedHead)
+	syncer.head = head
+	syncer.syncMode = CaughtUp
+}
+
+func reverse(tips []*TipSet) []*TipSet {
+	out := make([]*TipSet, len(tips))
+	for i := 0; i < len(tips); i++ {
+		out[i] = tips[len(tips)-(i+1)]
+	}
+	return out
+}
+
+func copyBlockstore(from, to bstore.Blockstore) error {
+	cids, err := from.AllKeysChan(context.TODO())
+	if err != nil {
+		return err
+	}
+
+	for c := range cids {
+		b, err := from.Get(c)
+		if err != nil {
+			return err
+		}
+
+		if err := to.Put(b); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+func zipTipSetAndMessages(cst *hamt.CborIpldStore, ts *TipSet, messages []*SignedMessage, msgincl [][]int) (*FullTipSet, error) {
+	if len(ts.Blocks()) != len(msgincl) {
+		return nil, fmt.Errorf("msgincl length didnt match tipset size")
+	}
+	fmt.Println("zipping messages: ", msgincl)
+	fmt.Println("into block: ", ts.Blocks()[0].Height)
+
+	fts := &FullTipSet{}
+	for bi, b := range ts.Blocks() {
+		var msgs []*SignedMessage
+		var msgCids []interface{}
+		for _, m := range msgincl[bi] {
+			msgs = append(msgs, messages[m])
+			msgCids = append(msgCids, messages[m].Cid())
+		}
+
+		mroot, err := sharray.Build(context.TODO(), 4, msgCids, cst)
+		if err != nil {
+			return nil, err
+		}
+
+		fmt.Println("messages: ", msgCids)
+		fmt.Println("message root: ", b.Messages, mroot)
+		if b.Messages != mroot {
+			return nil, fmt.Errorf("messages didnt match message root in header")
+		}
+
+		fb := &FullBlock{
+			Header:   b,
+			Messages: msgs,
+		}
+
+		fts.Blocks = append(fts.Blocks, fb)
+	}
+
+	return fts, nil
+}
+
+func (syncer *Syncer) selectHead(heads map[peer.ID]*TipSet) (*TipSet, error) {
+	var headsArr []*TipSet
+	for _, ts := range heads {
+		headsArr = append(headsArr, ts)
+	}
+
+	sel := headsArr[0]
+	for i := 1; i < len(headsArr); i++ {
+		cur := headsArr[i]
+
+		yes, err := syncer.store.IsAncestorOf(cur, sel)
+		if err != nil {
+			return nil, err
+		}
+		if yes {
+			continue
+		}
+
+		yes, err = syncer.store.IsAncestorOf(sel, cur)
+		if err != nil {
+			return nil, err
+		}
+		if yes {
+			sel = cur
+			continue
+		}
+
+		nca, err := syncer.store.NearestCommonAncestor(cur, sel)
+		if err != nil {
+			return nil, err
+		}
+
+		if sel.Height()-nca.Height() > ForkLengthThreshold {
+			// TODO: handle this better than refusing to sync
+			return nil, fmt.Errorf("Conflict exists in heads set")
+		}
+
+		if syncer.store.Weight(cur) > syncer.store.Weight(sel) {
+			sel = cur
+		}
+	}
+	return sel, nil
+}
+
+func (syncer *Syncer) FetchTipSet(ctx context.Context, p peer.ID, cids []cid.Cid) (*FullTipSet, error) {
+	if fts, err := syncer.tryLoadFullTipSet(cids); err == nil {
+		return fts, nil
+	}
+
+	return syncer.bsync.GetFullTipSet(ctx, p, cids)
+}
+
+func (syncer *Syncer) tryLoadFullTipSet(cids []cid.Cid) (*FullTipSet, error) {
+	ts, err := syncer.store.LoadTipSet(cids)
+	if err != nil {
+		return nil, err
+	}
+
+	fts := &FullTipSet{}
+	for _, b := range ts.Blocks() {
+		messages, err := syncer.store.MessagesForBlock(b)
+		if err != nil {
+			return nil, err
+		}
+
+		fb := &FullBlock{
+			Header:   b,
+			Messages: messages,
+		}
+		fts.Blocks = append(fts.Blocks, fb)
+	}
+
+	return fts, nil
+}
+
+// FullTipSet is an expanded version of the TipSet that contains all the blocks and messages
+type FullTipSet struct {
+	Blocks []*FullBlock
+	tipset *TipSet
+	cids   []cid.Cid
+}
+
+func NewFullTipSet(blks []*FullBlock) *FullTipSet {
+	return &FullTipSet{
+		Blocks: blks,
+	}
+}
+
+func (fts *FullTipSet) Cids() []cid.Cid {
+	if fts.cids != nil {
+		return fts.cids
+	}
+
+	var cids []cid.Cid
+	for _, b := range fts.Blocks {
+		cids = append(cids, b.Cid())
+	}
+	fts.cids = cids
+
+	return cids
+}
+
+func (fts *FullTipSet) TipSet() *TipSet {
+	if fts.tipset != nil {
+		return fts.tipset
+	}
+
+	var headers []*BlockHeader
+	for _, b := range fts.Blocks {
+		headers = append(headers, b.Header)
+	}
+
+	ts, err := NewTipSet(headers)
+	if err != nil {
+		panic(err)
+	}
+
+	return ts
+}
+
+// SyncCaughtUp is used to stay in sync once caught up to
+// the rest of the network.
+func (syncer *Syncer) SyncCaughtUp(maybeHead *FullTipSet) error {
+	ts := maybeHead.TipSet()
+	if syncer.genesis.Equals(ts) {
+		return nil
+	}
+
+	chain, err := syncer.collectChainCaughtUp(maybeHead)
+	if err != nil {
+		return err
+	}
+
+	for i := len(chain) - 1; i >= 0; i-- {
+		ts := chain[i]
+		if err := syncer.ValidateTipSet(ts); err != nil {
+			return errors.Wrap(err, "validate tipset failed")
+		}
+
+		syncer.store.PutTipSet(ts)
+	}
+
+	if err := syncer.store.PutTipSet(maybeHead); err != nil {
+		return errors.Wrap(err, "failed to put synced tipset to chainstore")
+	}
+
+	if syncer.store.Weight(chain[0].TipSet()) > syncer.store.Weight(syncer.head) {
+		fmt.Println("Accepted new head: ", chain[0].Cids())
+		syncer.head = chain[0].TipSet()
+	}
+	return nil
+}
+
+func (syncer *Syncer) ValidateTipSet(fts *FullTipSet) error {
+	ts := fts.TipSet()
+	if ts.Equals(syncer.genesis) {
+		return nil
+	}
+
+	for _, b := range fts.Blocks {
+		if err := syncer.ValidateBlock(b); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func (syncer *Syncer) ValidateBlock(b *FullBlock) error {
+	h := b.Header
+	stateroot, err := syncer.store.TipSetState(h.Parents)
+	if err != nil {
+		log.Error("get tipsetstate failed: ", h.Height, h.Parents, err)
+		return err
+	}
+	baseTs, err := syncer.store.LoadTipSet(b.Header.Parents)
+	if err != nil {
+		return err
+	}
+
+	vm, err := NewVM(stateroot, b.Header.Height, b.Header.Miner, syncer.store)
+	if err != nil {
+		return err
+	}
+
+	if err := vm.TransferFunds(NetworkAddress, b.Header.Miner, miningRewardForBlock(baseTs)); err != nil {
+		return err
+	}
+
+	var receipts []interface{}
+	for _, m := range b.Messages {
+		receipt, err := vm.ApplyMessage(&m.Message)
+		if err != nil {
+			return err
+		}
+
+		receipts = append(receipts, receipt)
+	}
+
+	cst := hamt.CSTFromBstore(syncer.store.bs)
+	recptRoot, err := sharray.Build(context.TODO(), 4, receipts, cst)
+	if err != nil {
+		return err
+	}
+	if recptRoot != b.Header.MessageReceipts {
+		return fmt.Errorf("receipts mismatched")
+	}
+
+	final, err := vm.Flush(context.TODO())
+	if err != nil {
+		return err
+	}
+
+	if b.Header.StateRoot != final {
+		return fmt.Errorf("final state root does not match block")
+	}
+
+	return nil
+
+}
+
+func DeductFunds(act *Actor, amt BigInt) error {
+	if BigCmp(act.Balance, amt) < 0 {
+		return fmt.Errorf("not enough funds")
+	}
+
+	act.Balance = BigSub(act.Balance, amt)
+	return nil
+}
+
+func DepositFunds(act *Actor, amt BigInt) {
+	act.Balance = BigAdd(act.Balance, amt)
+}
+
+func TryCreateAccountActor(st *StateTree, addr address.Address) (*Actor, error) {
+	act, err := makeActor(st, addr)
+	if err != nil {
+		return nil, err
+	}
+
+	_, err = st.RegisterNewAddress(addr, act)
+	if err != nil {
+		return nil, err
+	}
+
+	return act, nil
+}
+
+func makeActor(st *StateTree, addr address.Address) (*Actor, error) {
+	switch addr.Protocol() {
+	case address.BLS:
+		return NewBLSAccountActor(st, addr)
+	case address.SECP256K1:
+		return NewSecp256k1AccountActor(st, addr)
+	case address.ID:
+		return nil, fmt.Errorf("no actor with given ID")
+	case address.Actor:
+		return nil, fmt.Errorf("no such actor")
+	default:
+		return nil, fmt.Errorf("address has unsupported protocol: %d", addr.Protocol())
+	}
+}
+
+func NewBLSAccountActor(st *StateTree, addr address.Address) (*Actor, error) {
+	var acstate AccountActorState
+	acstate.Address = addr
+
+	c, err := st.store.Put(context.TODO(), acstate)
+	if err != nil {
+		return nil, err
+	}
+
+	nact := &Actor{
+		Code:    AccountActorCodeCid,
+		Balance: NewInt(0),
+		Head:    c,
+	}
+
+	return nact, nil
+}
+
+func NewSecp256k1AccountActor(st *StateTree, addr address.Address) (*Actor, error) {
+	nact := &Actor{
+		Code:    AccountActorCodeCid,
+		Balance: NewInt(0),
+		Head:    EmptyObjectCid,
+	}
+
+	return nact, nil
+}
+
+func (syncer *Syncer) Punctual(ts *TipSet) bool {
+	return true
+}
+
+func (syncer *Syncer) collectChainCaughtUp(fts *FullTipSet) ([]*FullTipSet, error) {
+	// fetch tipset and messages via bitswap
+
+	chain := []*FullTipSet{fts}
+	cur := fts.TipSet()
+
+	for {
+		ts, err := syncer.store.LoadTipSet(cur.Parents())
+		if err != nil {
+			panic("should do something better, like fetch? or error?")
+		}
+
+		return chain, nil // return the chain because we have this last block in our cache already.
+
+		if ts.Equals(syncer.genesis) {
+			break
+		}
+
+		/*
+			if !syncer.Punctual(ts) {
+				syncer.bad.InvalidateChain(chain)
+				syncer.bad.InvalidateTipSet(ts)
+				return nil, errors.New("tipset forks too far back from head")
+			}
+		*/
+
+		chain = append(chain, fts)
+		log.Error("received unknown chain in caught up mode...")
+		panic("for now, we panic...")
+
+		has, err := syncer.store.Contains(ts)
+		if err != nil {
+			return nil, err
+		}
+		if has {
+			// Store has record of this tipset.
+			return chain, nil
+		}
+
+		/*
+			parent, err := syncer.FetchTipSet(context.TODO(), ts.Parents())
+			if err != nil {
+				return nil, err
+			}
+			ts = parent
+		*/
+	}
+
+	return chain, nil
+}

chain/types.go

@@ -0,0 +1,593 @@
+package chain
+
+import (
+	"bytes"
+	"encoding/binary"
+	"fmt"
+	"github.com/filecoin-project/go-lotus/chain/address"
+	"math/big"
+
+	block "github.com/ipfs/go-block-format"
+	"github.com/ipfs/go-cid"
+	cbor "github.com/ipfs/go-ipld-cbor"
+	ipld "github.com/ipfs/go-ipld-format"
+	"github.com/multiformats/go-multihash"
+	"github.com/polydawn/refmt/obj/atlas"
+)
+
+func init() {
+	ipld.Register(0x1f, IpldDecode)
+
+	cbor.RegisterCborType(MessageReceipt{})
+	cbor.RegisterCborType(Actor{})
+	cbor.RegisterCborType(BlockMsg{})
+
+	///*
+	cbor.RegisterCborType(atlas.BuildEntry(BigInt{}).UseTag(2).Transform().
+		TransformMarshal(atlas.MakeMarshalTransformFunc(
+			func(i BigInt) ([]byte, error) {
+				if i.Int == nil {
+					return []byte{}, nil
+				}
+
+				return i.Bytes(), nil
+			})).
+		TransformUnmarshal(atlas.MakeUnmarshalTransformFunc(
+			func(x []byte) (BigInt, error) {
+				return BigFromBytes(x), nil
+			})).
+		Complete())
+	//*/
+	cbor.RegisterCborType(atlas.BuildEntry(SignedMessage{}).UseTag(45).Transform().
+		TransformMarshal(atlas.MakeMarshalTransformFunc(
+			func(sm SignedMessage) ([]interface{}, error) {
+				return []interface{}{
+					sm.Message,
+					sm.Signature,
+				}, nil
+			})).
+		TransformUnmarshal(atlas.MakeUnmarshalTransformFunc(
+			func(x []interface{}) (SignedMessage, error) {
+				sigb, ok := x[1].([]byte)
+				if !ok {
+					return SignedMessage{}, fmt.Errorf("signature in signed message was not bytes")
+				}
+
+				sig, err := SignatureFromBytes(sigb)
+				if err != nil {
+					return SignedMessage{}, err
+				}
+
+				return SignedMessage{
+					Message:   x[0].(Message),
+					Signature: sig,
+				}, nil
+			})).
+		Complete())
+	cbor.RegisterCborType(atlas.BuildEntry(Signature{}).Transform().
+		TransformMarshal(atlas.MakeMarshalTransformFunc(
+			func(s Signature) ([]byte, error) {
+				buf := make([]byte, 4)
+				n := binary.PutUvarint(buf, uint64(s.TypeCode()))
+				return append(buf[:n], s.Data...), nil
+			})).
+		TransformUnmarshal(atlas.MakeUnmarshalTransformFunc(
+			func(x []byte) (Signature, error) {
+				return SignatureFromBytes(x)
+			})).
+		Complete())
+	cbor.RegisterCborType(atlas.BuildEntry(Message{}).UseTag(44).Transform().
+		TransformMarshal(atlas.MakeMarshalTransformFunc(
+			func(m Message) ([]interface{}, error) {
+				return []interface{}{
+					m.To.Bytes(),
+					m.From.Bytes(),
+					m.Nonce,
+					m.Value,
+					m.GasPrice,
+					m.GasLimit,
+					m.Method,
+					m.Params,
+				}, nil
+			})).
+		TransformUnmarshal(atlas.MakeUnmarshalTransformFunc(
+			func(arr []interface{}) (Message, error) {
+				to, err := address.NewFromBytes(arr[0].([]byte))
+				if err != nil {
+					return Message{}, err
+				}
+
+				from, err := address.NewFromBytes(arr[1].([]byte))
+				if err != nil {
+					return Message{}, err
+				}
+
+				nonce, ok := arr[2].(uint64)
+				if !ok {
+					return Message{}, fmt.Errorf("expected uint64 nonce at index 2")
+				}
+
+				value := arr[3].(BigInt)
+				gasPrice := arr[4].(BigInt)
+				gasLimit := arr[5].(BigInt)
+				method, _ := arr[6].(uint64)
+				params, _ := arr[7].([]byte)
+
+				if gasPrice.Nil() {
+					gasPrice = NewInt(0)
+				}
+
+				if gasLimit.Nil() {
+					gasLimit = NewInt(0)
+				}
+
+				return Message{
+					To:       to,
+					From:     from,
+					Nonce:    nonce,
+					Value:    value,
+					GasPrice: gasPrice,
+					GasLimit: gasLimit,
+					Method:   method,
+					Params:   params,
+				}, nil
+			})).
+		Complete())
+	cbor.RegisterCborType(atlas.BuildEntry(BlockHeader{}).UseTag(43).Transform().
+		TransformMarshal(atlas.MakeMarshalTransformFunc(
+			func(blk BlockHeader) ([]interface{}, error) {
+				if blk.Tickets == nil {
+					blk.Tickets = []Ticket{}
+				}
+				if blk.Parents == nil {
+					blk.Parents = []cid.Cid{}
+				}
+				return []interface{}{
+					blk.Miner.Bytes(),
+					blk.Tickets,
+					blk.ElectionProof,
+					blk.Parents,
+					blk.ParentWeight,
+					blk.Height,
+					blk.StateRoot,
+					blk.Messages,
+					blk.MessageReceipts,
+				}, nil
+			})).
+		TransformUnmarshal(atlas.MakeUnmarshalTransformFunc(
+			func(arr []interface{}) (BlockHeader, error) {
+				miner, err := address.NewFromBytes(arr[0].([]byte))
+				if err != nil {
+					return BlockHeader{}, err
+				}
+
+				tickets := []Ticket{}
+				ticketarr, _ := arr[1].([]interface{})
+				for _, t := range ticketarr {
+					tickets = append(tickets, Ticket(t.([]byte)))
+				}
+				electionProof, _ := arr[2].([]byte)
+
+				parents := []cid.Cid{}
+				parentsArr, _ := arr[3].([]interface{})
+				for _, p := range parentsArr {
+					parents = append(parents, p.(cid.Cid))
+				}
+				parentWeight := arr[4].(BigInt)
+				height := arr[5].(uint64)
+				stateRoot := arr[6].(cid.Cid)
+
+				msgscid := arr[7].(cid.Cid)
+				recscid := arr[8].(cid.Cid)
+
+				return BlockHeader{
+					Miner:           miner,
+					Tickets:         tickets,
+					ElectionProof:   electionProof,
+					Parents:         parents,
+					ParentWeight:    parentWeight,
+					Height:          height,
+					StateRoot:       stateRoot,
+					Messages:        msgscid,
+					MessageReceipts: recscid,
+				}, nil
+			})).
+		Complete())
+}
+
+type BigInt struct {
+	*big.Int
+}
+
+func NewInt(i uint64) BigInt {
+	return BigInt{big.NewInt(0).SetUint64(i)}
+}
+
+func BigFromBytes(b []byte) BigInt {
+	i := big.NewInt(0).SetBytes(b)
+	return BigInt{i}
+}
+
+func BigMul(a, b BigInt) BigInt {
+	return BigInt{big.NewInt(0).Mul(a.Int, b.Int)}
+}
+
+func BigAdd(a, b BigInt) BigInt {
+	return BigInt{big.NewInt(0).Add(a.Int, b.Int)}
+}
+
+func BigSub(a, b BigInt) BigInt {
+	return BigInt{big.NewInt(0).Sub(a.Int, b.Int)}
+}
+
+func BigCmp(a, b BigInt) int {
+	return a.Int.Cmp(b.Int)
+}
+
+func (bi *BigInt) Nil() bool {
+	return bi.Int == nil
+}
+
+type Actor struct {
+	Code    cid.Cid
+	Head    cid.Cid
+	Nonce   uint64
+	Balance BigInt
+}
+
+type BlockHeader struct {
+	Miner address.Address
+
+	Tickets []Ticket
+
+	ElectionProof []byte
+
+	Parents []cid.Cid
+
+	ParentWeight BigInt
+
+	Height uint64
+
+	StateRoot cid.Cid
+
+	Messages cid.Cid
+
+	BLSAggregate Signature
+
+	MessageReceipts cid.Cid
+}
+
+func (b *BlockHeader) ToStorageBlock() (block.Block, error) {
+	data, err := b.Serialize()
+	if err != nil {
+		return nil, err
+	}
+
+	pref := cid.NewPrefixV1(0x1f, multihash.BLAKE2B_MIN+31)
+	c, err := pref.Sum(data)
+	if err != nil {
+		return nil, err
+	}
+
+	return block.NewBlockWithCid(data, c)
+}
+
+func (b *BlockHeader) Cid() cid.Cid {
+	sb, err := b.ToStorageBlock()
+	if err != nil {
+		panic(err)
+	}
+
+	return sb.Cid()
+}
+
+func DecodeBlock(b []byte) (*BlockHeader, error) {
+	var blk BlockHeader
+	if err := cbor.DecodeInto(b, &blk); err != nil {
+		return nil, err
+	}
+
+	return &blk, nil
+}
+
+func (blk *BlockHeader) Serialize() ([]byte, error) {
+	return cbor.DumpObject(blk)
+}
+
+type Message struct {
+	To   address.Address
+	From address.Address
+
+	Nonce uint64
+
+	Value BigInt
+
+	GasPrice BigInt
+	GasLimit BigInt
+
+	Method uint64
+	Params []byte
+}
+
+func DecodeMessage(b []byte) (*Message, error) {
+	var msg Message
+	if err := cbor.DecodeInto(b, &msg); err != nil {
+		return nil, err
+	}
+
+	return &msg, nil
+}
+
+func (m *Message) Serialize() ([]byte, error) {
+	return cbor.DumpObject(m)
+}
+
+func (m *Message) ToStorageBlock() (block.Block, error) {
+	data, err := m.Serialize()
+	if err != nil {
+		return nil, err
+	}
+
+	pref := cid.NewPrefixV1(0x1f, multihash.BLAKE2B_MIN+31)
+	c, err := pref.Sum(data)
+	if err != nil {
+		return nil, err
+	}
+
+	return block.NewBlockWithCid(data, c)
+}
+
+func (m *SignedMessage) ToStorageBlock() (block.Block, error) {
+	data, err := m.Serialize()
+	if err != nil {
+		return nil, err
+	}
+
+	pref := cid.NewPrefixV1(0x1f, multihash.BLAKE2B_MIN+31)
+	c, err := pref.Sum(data)
+	if err != nil {
+		return nil, err
+	}
+
+	return block.NewBlockWithCid(data, c)
+}
+
+func (m *SignedMessage) Cid() cid.Cid {
+	sb, err := m.ToStorageBlock()
+	if err != nil {
+		panic(err)
+	}
+
+	return sb.Cid()
+}
+
+type MessageReceipt struct {
+	ExitCode uint8
+
+	Return []byte
+
+	GasUsed BigInt
+}
+
+func (mr *MessageReceipt) Equals(o *MessageReceipt) bool {
+	return mr.ExitCode == o.ExitCode && bytes.Equal(mr.Return, o.Return) && BigCmp(mr.GasUsed, o.GasUsed) == 0
+}
+
+type SignedMessage struct {
+	Message   Message
+	Signature Signature
+}
+
+func DecodeSignedMessage(data []byte) (*SignedMessage, error) {
+	var msg SignedMessage
+	if err := cbor.DecodeInto(data, &msg); err != nil {
+		return nil, err
+	}
+
+	return &msg, nil
+}
+
+func (sm *SignedMessage) Serialize() ([]byte, error) {
+	data, err := cbor.DumpObject(sm)
+	if err != nil {
+		return nil, err
+	}
+	return data, nil
+}
+
+type TipSet struct {
+	cids   []cid.Cid
+	blks   []*BlockHeader
+	height uint64
+}
+
+func NewTipSet(blks []*BlockHeader) (*TipSet, error) {
+	var ts TipSet
+	ts.cids = []cid.Cid{blks[0].Cid()}
+	ts.blks = blks
+	for _, b := range blks[1:] {
+		if b.Height != blks[0].Height {
+			return nil, fmt.Errorf("cannot create tipset with mismatching heights")
+		}
+		ts.cids = append(ts.cids, b.Cid())
+	}
+	ts.height = blks[0].Height
+
+	return &ts, nil
+}
+
+func (ts *TipSet) Cids() []cid.Cid {
+	return ts.cids
+}
+
+func (ts *TipSet) Height() uint64 {
+	return ts.height
+}
+
+func (ts *TipSet) Parents() []cid.Cid {
+	return ts.blks[0].Parents
+}
+
+func (ts *TipSet) Blocks() []*BlockHeader {
+	return ts.blks
+}
+
+func (ts *TipSet) Equals(ots *TipSet) bool {
+	if len(ts.blks) != len(ots.blks) {
+		return false
+	}
+
+	for i, b := range ts.blks {
+		if b.Cid() != ots.blks[i].Cid() {
+			return false
+		}
+	}
+
+	return true
+}
+
+type Ticket []byte
+type ElectionProof []byte
+
+func IpldDecode(block block.Block) (ipld.Node, error) {
+	var i interface{}
+	if err := cbor.DecodeInto(block.RawData(), &i); err != nil {
+		panic(err)
+	}
+
+	fmt.Println("IPLD DECODE!")
+	return &filecoinIpldNode{i}, nil
+}
+
+type filecoinIpldNode struct {
+	val interface{}
+}
+
+func (f *filecoinIpldNode) Cid() cid.Cid {
+	switch t := f.val.(type) {
+	case BlockHeader:
+		return t.Cid()
+	case SignedMessage:
+		return t.Cid()
+	default:
+		panic("whats going on")
+	}
+}
+
+func (f *filecoinIpldNode) Copy() ipld.Node {
+	panic("no")
+}
+
+func (f *filecoinIpldNode) Links() []*ipld.Link {
+	switch t := f.val.(type) {
+	case BlockHeader:
+		fmt.Println("block links!", t.StateRoot)
+		return []*ipld.Link{
+			{
+				Cid: t.StateRoot,
+			},
+			{
+				Cid: t.Messages,
+			},
+			{
+				Cid: t.MessageReceipts,
+			},
+		}
+	case Message:
+		return nil
+	default:
+		panic("whats going on")
+	}
+
+}
+
+func (f *filecoinIpldNode) Resolve(path []string) (interface{}, []string, error) {
+	/*
+		switch t := f.val.(type) {
+		case Block:
+			switch path[0] {
+			}
+		case Message:
+		default:
+			panic("whats going on")
+		}
+	*/
+	panic("please dont call this")
+}
+
+// Tree lists all paths within the object under 'path', and up to the given depth.
+// To list the entire object (similar to `find .`) pass "" and -1
+func (f *filecoinIpldNode) Tree(path string, depth int) []string {
+	panic("dont call this either")
+}
+
+func (f *filecoinIpldNode) ResolveLink(path []string) (*ipld.Link, []string, error) {
+	panic("please no")
+}
+
+func (f *filecoinIpldNode) Stat() (*ipld.NodeStat, error) {
+	panic("dont call this")
+
+}
+
+func (f *filecoinIpldNode) Size() (uint64, error) {
+	panic("dont call this")
+}
+
+func (f *filecoinIpldNode) Loggable() map[string]interface{} {
+	return nil
+}
+
+func (f *filecoinIpldNode) RawData() []byte {
+	switch t := f.val.(type) {
+	case BlockHeader:
+		sb, err := t.ToStorageBlock()
+		if err != nil {
+			panic(err)
+		}
+		return sb.RawData()
+	case SignedMessage:
+		sb, err := t.ToStorageBlock()
+		if err != nil {
+			panic(err)
+		}
+		return sb.RawData()
+	default:
+		panic("whats going on")
+	}
+}
+
+func (f *filecoinIpldNode) String() string {
+	return "cats"
+}
+
+type FullBlock struct {
+	Header   *BlockHeader
+	Messages []*SignedMessage
+}
+
+func (fb *FullBlock) Cid() cid.Cid {
+	return fb.Header.Cid()
+}
+
+type BlockMsg struct {
+	Header   *BlockHeader
+	Messages []cid.Cid
+}
+
+func DecodeBlockMsg(b []byte) (*BlockMsg, error) {
+	var bm BlockMsg
+	if err := cbor.DecodeInto(b, &bm); err != nil {
+		return nil, err
+	}
+
+	return &bm, nil
+}
+
+func (bm *BlockMsg) Cid() cid.Cid {
+	return bm.Header.Cid()
+}
+
+func (bm *BlockMsg) Serialize() ([]byte, error) {
+	return cbor.DumpObject(bm)
+}

chain/vm.go

@@ -0,0 +1,207 @@
+package chain
+
+import (
+	"context"
+	"fmt"
+	"github.com/filecoin-project/go-lotus/chain/address"
+	"github.com/pkg/errors"
+	"math/big"
+
+	bserv "github.com/ipfs/go-blockservice"
+	cid "github.com/ipfs/go-cid"
+	hamt "github.com/ipfs/go-hamt-ipld"
+	ipld "github.com/ipfs/go-ipld-format"
+	dag "github.com/ipfs/go-merkledag"
+)
+
+type VMContext struct {
+	state  *StateTree
+	msg    *Message
+	height uint64
+	cst    *hamt.CborIpldStore
+}
+
+// Message is the message that kicked off the current invocation
+func (vmc *VMContext) Message() *Message {
+	return vmc.msg
+}
+
+/*
+// Storage provides access to the VM storage layer
+func (vmc *VMContext) Storage() Storage {
+	panic("nyi")
+}
+*/
+
+func (vmc *VMContext) Ipld() *hamt.CborIpldStore {
+	return vmc.cst
+}
+
+// Send allows the current execution context to invoke methods on other actors in the system
+func (vmc *VMContext) Send(to address.Address, method string, value *big.Int, params []interface{}) ([][]byte, uint8, error) {
+	panic("nyi")
+}
+
+// BlockHeight returns the height of the block this message was added to the chain in
+func (vmc *VMContext) BlockHeight() uint64 {
+	return vmc.height
+}
+
+func (vmc *VMContext) GasUsed() BigInt {
+	return NewInt(0)
+}
+
+func makeVMContext(state *StateTree, msg *Message, height uint64) *VMContext {
+	return &VMContext{
+		state:  state,
+		msg:    msg,
+		height: height,
+	}
+}
+
+type VM struct {
+	cstate      *StateTree
+	base        cid.Cid
+	cs          *ChainStore
+	buf         *BufferedBS
+	blockHeight uint64
+	blockMiner  address.Address
+}
+
+func NewVM(base cid.Cid, height uint64, maddr address.Address, cs *ChainStore) (*VM, error) {
+	buf := NewBufferedBstore(cs.bs)
+	cst := hamt.CSTFromBstore(buf)
+	state, err := LoadStateTree(cst, base)
+	if err != nil {
+		return nil, err
+	}
+
+	return &VM{
+		cstate:      state,
+		base:        base,
+		cs:          cs,
+		buf:         buf,
+		blockHeight: height,
+		blockMiner:  maddr,
+	}, nil
+}
+
+func (vm *VM) ApplyMessage(msg *Message) (*MessageReceipt, error) {
+	st := vm.cstate
+	st.Snapshot()
+	fromActor, err := st.GetActor(msg.From)
+	if err != nil {
+		return nil, errors.Wrap(err, "from actor not found")
+	}
+
+	gascost := BigMul(msg.GasLimit, msg.GasPrice)
+	totalCost := BigAdd(gascost, msg.Value)
+	if BigCmp(fromActor.Balance, totalCost) < 0 {
+		return nil, fmt.Errorf("not enough funds")
+	}
+
+	if msg.Nonce != fromActor.Nonce {
+		return nil, fmt.Errorf("invalid nonce")
+	}
+	fromActor.Nonce++
+
+	toActor, err := st.GetActor(msg.To)
+	if err != nil {
+		if err == ErrActorNotFound {
+			a, err := TryCreateAccountActor(st, msg.To)
+			if err != nil {
+				return nil, err
+			}
+			toActor = a
+		} else {
+			return nil, err
+		}
+	}
+
+	if err := DeductFunds(fromActor, totalCost); err != nil {
+		return nil, errors.Wrap(err, "failed to deduct funds")
+	}
+	DepositFunds(toActor, msg.Value)
+
+	vmctx := makeVMContext(st, msg, vm.blockHeight)
+
+	var errcode byte
+	var ret []byte
+	if msg.Method != 0 {
+		ret, errcode, err = vm.Invoke(toActor, vmctx, msg.Method, msg.Params)
+		if err != nil {
+			return nil, err
+		}
+
+		if errcode != 0 {
+			// revert all state changes since snapshot
+			st.Revert()
+			gascost := BigMul(vmctx.GasUsed(), msg.GasPrice)
+			if err := DeductFunds(fromActor, gascost); err != nil {
+				panic("invariant violated: " + err.Error())
+			}
+		} else {
+			// refund unused gas
+			refund := BigMul(BigSub(msg.GasLimit, vmctx.GasUsed()), msg.GasPrice)
+			DepositFunds(fromActor, refund)
+		}
+	}
+
+	// reward miner gas fees
+	miner, err := st.GetActor(vm.blockMiner)
+	if err != nil {
+		return nil, errors.Wrap(err, "getting block miner actor failed")
+	}
+
+	gasReward := BigMul(msg.GasPrice, vmctx.GasUsed())
+	DepositFunds(miner, gasReward)
+
+	return &MessageReceipt{
+		ExitCode: errcode,
+		Return:   ret,
+		GasUsed:  vmctx.GasUsed(),
+	}, nil
+}
+
+func (vm *VM) Flush(ctx context.Context) (cid.Cid, error) {
+	from := dag.NewDAGService(bserv.New(vm.buf, nil))
+	to := dag.NewDAGService(bserv.New(vm.buf.read, nil))
+
+	root, err := vm.cstate.Flush()
+	if err != nil {
+		return cid.Undef, err
+	}
+
+	if err := ipld.Copy(ctx, from, to, root); err != nil {
+		return cid.Undef, err
+	}
+
+	return root, nil
+}
+
+func (vm *VM) TransferFunds(from, to address.Address, amt BigInt) error {
+	if from == to {
+		return nil
+	}
+
+	fromAct, err := vm.cstate.GetActor(from)
+	if err != nil {
+		return err
+	}
+
+	toAct, err := vm.cstate.GetActor(from)
+	if err != nil {
+		return err
+	}
+
+	if err := DeductFunds(fromAct, amt); err != nil {
+		return errors.Wrap(err, "failed to deduct funds")
+	}
+	DepositFunds(toAct, amt)
+
+	return nil
+}
+
+func (vm *VM) Invoke(act *Actor, vmctx *VMContext, method uint64, params []byte) ([]byte, byte, error) {
+	panic("Implement me")
+}

chain/wallet.go

@@ -0,0 +1,196 @@
+package chain
+
+
+import (
+	"encoding/binary"
+	"fmt"
+	"github.com/filecoin-project/go-lotus/chain/address"
+
+	"github.com/minio/blake2b-simd"
+
+	bls "github.com/filecoin-project/go-filecoin/bls-signatures"
+	crypto "github.com/filecoin-project/go-filecoin/crypto"
+)
+
+const (
+	KTSecp256k1 = "secp256k1"
+	KTBLS       = "bls"
+)
+
+type Wallet struct {
+	keys map[address.Address]*KeyInfo
+}
+
+func NewWallet() *Wallet {
+	return &Wallet{keys: make(map[address.Address]*KeyInfo)}
+}
+
+type Signature struct {
+	Type string
+	Data []byte
+}
+
+func SignatureFromBytes(x []byte) (Signature, error) {
+	val, nr := binary.Uvarint(x)
+	if nr != 1 {
+		return Signature{}, fmt.Errorf("signatures with type field longer than one byte are invalid")
+	}
+	var ts string
+	switch val {
+	case 1:
+		ts = KTSecp256k1
+	default:
+		return Signature{}, fmt.Errorf("unsupported signature type: %d", val)
+	}
+
+	return Signature{
+		Type: ts,
+		Data: x[1:],
+	}, nil
+}
+
+func (s *Signature) Verify(addr address.Address, msg []byte) error {
+	b2sum := blake2b.Sum256(msg)
+
+	switch s.Type {
+	case KTSecp256k1:
+		pubk, err := crypto.EcRecover(b2sum[:], s.Data)
+		if err != nil {
+			return err
+		}
+
+		maybeaddr, err := address.NewSecp256k1Address(pubk)
+		if err != nil {
+			return err
+		}
+
+		if addr != maybeaddr {
+			return fmt.Errorf("signature did not match")
+		}
+
+		return nil
+	default:
+		return fmt.Errorf("cannot verify signature of unsupported type: %s", s.Type)
+	}
+}
+
+func (s *Signature) TypeCode() int {
+	switch s.Type {
+	case KTSecp256k1:
+		return 1
+	case KTBLS:
+		return 2
+	default:
+		panic("unsupported signature type")
+	}
+}
+
+func (w *Wallet) Sign(addr address.Address, msg []byte) (*Signature, error) {
+	ki, err := w.findKey(addr)
+	if err != nil {
+		return nil, err
+	}
+
+	switch ki.Type {
+	case KTSecp256k1:
+		b2sum := blake2b.Sum256(msg)
+		sig, err := crypto.Sign(ki.PrivateKey, b2sum[:])
+		if err != nil {
+			return nil, err
+		}
+
+		return &Signature{
+			Type: KTSecp256k1,
+			Data: sig,
+		}, nil
+	case KTBLS:
+		var pk bls.PrivateKey
+		copy(pk[:], ki.PrivateKey)
+		sig := bls.PrivateKeySign(pk, msg)
+
+		return &Signature{
+			Type: KTBLS,
+			Data: sig[:],
+		}, nil
+
+	default:
+		panic("cant do it sir")
+	}
+}
+
+func (w *Wallet) findKey(addr address.Address) (*KeyInfo, error) {
+	ki, ok := w.keys[addr]
+	if !ok {
+		return nil, fmt.Errorf("key not for given address not found in wallet")
+	}
+	return ki, nil
+}
+
+func (w *Wallet) Export(addr address.Address) ([]byte, error) {
+	panic("nyi")
+}
+
+func (w *Wallet) Import(kdata []byte) (address.Address, error) {
+	panic("nyi")
+}
+
+func (w *Wallet) GenerateKey(typ string) (address.Address, error) {
+	switch typ {
+	case KTSecp256k1:
+		k, err := crypto.GenerateKey()
+		if err != nil {
+			return address.Undef, err
+		}
+		ki := &KeyInfo{
+			PrivateKey: k,
+			Type:       typ,
+		}
+
+		addr := ki.Address()
+		w.keys[addr] = ki
+		return addr, nil
+	case KTBLS:
+		priv := bls.PrivateKeyGenerate()
+
+		ki := &KeyInfo{
+			PrivateKey: priv[:],
+			Type:       KTBLS,
+		}
+
+		addr := ki.Address()
+		w.keys[addr] = ki
+		return addr, nil
+	default:
+		return address.Undef, fmt.Errorf("invalid key type: %s", typ)
+	}
+}
+
+type KeyInfo struct {
+	PrivateKey []byte
+
+	Type string
+}
+
+func (ki *KeyInfo) Address() address.Address {
+	switch ki.Type {
+	case KTSecp256k1:
+		pub := crypto.PublicKey(ki.PrivateKey)
+		addr, err := address.NewSecp256k1Address(pub)
+		if err != nil {
+			panic(err)
+		}
+
+		return addr
+	case KTBLS:
+		var pk bls.PrivateKey
+		copy(pk[:], ki.PrivateKey)
+		pub := bls.PrivateKeyPublicKey(pk)
+		a, err := address.NewBLSAddress(pub[:])
+		if err != nil {
+			panic(err)
+		}
+		return a
+	default:
+		panic("unsupported key type")
+	}
+}

go.mod

@@ -4,10 +4,12 @@ go 1.12
 
 require (
 	github.com/BurntSushi/toml v0.3.1
-	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/filecoin-project/go-filecoin v0.0.1 // indirect
 	github.com/golang/protobuf v1.3.1 // indirect
 	github.com/ipfs/go-datastore v0.0.5
 	github.com/ipfs/go-ipfs-routing v0.1.0
+	github.com/ipfs/go-ipld-cbor v0.0.2 // indirect
+	github.com/ipfs/go-ipld-format v0.0.2 // indirect
 	github.com/ipfs/go-log v0.0.2-0.20190703113630-0c3cfb1eccc4
 	github.com/libp2p/go-libp2p v0.2.0
 	github.com/libp2p/go-libp2p-circuit v0.1.0
@@ -28,11 +30,16 @@ require (
 	github.com/libp2p/go-maddr-filter v0.0.4
 	github.com/multiformats/go-multiaddr v0.0.4
 	github.com/multiformats/go-multihash v0.0.5
+	github.com/polydawn/refmt v0.0.0-20190408063855-01bf1e26dd14 // indirect
 	github.com/stretchr/testify v1.3.0
 	github.com/whyrusleeping/multiaddr-filter v0.0.0-20160516205228-e903e4adabd7
+	github.com/whyrusleeping/pubsub v0.0.0-20131020042734-02de8aa2db3d // indirect
+	github.com/whyrusleeping/sharray v0.0.0-20190520213710-bd32aab369f8 // indirect
 	go.uber.org/dig v1.7.0 // indirect
 	go.uber.org/fx v1.9.0
 	go.uber.org/goleak v0.10.0 // indirect
+	golang.org/x/lint v0.0.0-20190301231843-5614ed5bae6f // indirect
+	golang.org/x/oauth2 v0.0.0-20190226205417-e64efc72b421 // indirect
+	golang.org/x/tools v0.0.0-20190312170243-e65039ee4138 // indirect
 	gopkg.in/urfave/cli.v2 v2.0.0-20180128182452-d3ae77c26ac8
-	gopkg.in/yaml.v2 v2.2.2 // indirect
 )

go.sum

@@ -1,9 +1,26 @@
 cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+git.apache.org/thrift.git v0.12.0/go.mod h1:fPE2ZNJGynbRyZ4dJvy6G277gSllfV2HJqblrnkyeyg=
+github.com/AndreasBriese/bbloom v0.0.0-20180913140656-343706a395b7 h1:PqzgE6kAMi81xWQA2QIVxjWkFHptGgC547vchpUbtFo=
 github.com/AndreasBriese/bbloom v0.0.0-20180913140656-343706a395b7/go.mod h1:bOvUY6CB00SOBii9/FifXqc0awNKxLFCL/+pkDPuyl8=
+github.com/Azure/go-ansiterm v0.0.0-20170929234023-d6e3b3328b78/go.mod h1:LmzpDX56iTiv29bbRTIsUNlaFfuhWRQBWjQdVyAevI8=
 github.com/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
+github.com/Kubuxu/go-os-helper v0.0.1 h1:EJiD2VUQyh5A9hWJLmc6iWg6yIcJ7jpBcwC8GMGXfDk=
 github.com/Kubuxu/go-os-helper v0.0.1/go.mod h1:N8B+I7vPCT80IcP58r50u4+gEEcsZETFUpAzWW2ep1Y=
+github.com/Microsoft/go-winio v0.4.12/go.mod h1:VhR8bwka0BXejwEJY73c50VrPtXAaKcyvVC4A4RozmA=
+github.com/OpenPeeDeeP/depguard v0.0.0-20180806142446-a69c782687b2/go.mod h1:7/4sitnI9YlQgTLLk734QlzXT8DuHVnAyztLplQjk+o=
+github.com/Shopify/sarama v1.19.0/go.mod h1:FVkBWblsNy7DGZRfXLU0O9RCGt5g3g3yEuWXgklEdEo=
+github.com/Shopify/toxiproxy v2.1.4+incompatible/go.mod h1:OXgGpZ6Cli1/URJOF1DMxUHB2q5Ap20/P/eIdh4G0pI=
+github.com/StackExchange/wmi v0.0.0-20180116203802-5d049714c4a6/go.mod h1:3eOhrUMpNV+6aFIbp5/iudMxNCF27Vw2OZgy4xEx0Fg=
+github.com/Stebalien/go-bitfield v0.0.0-20180330043415-076a62f9ce6e h1:2Z+EBRrOJsA3psnUPcEWMIH2EIga1xHflQcr/EZslx8=
+github.com/Stebalien/go-bitfield v0.0.0-20180330043415-076a62f9ce6e/go.mod h1:3oM7gXIttpYDAJXpVNnSCiUMYBLIZ6cb1t+Ip982MRo=
 github.com/aead/siphash v1.0.1/go.mod h1:Nywa3cDsYNNK3gaciGTWPwHt0wlpNV15vwmswBAUSII=
+github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
+github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
+github.com/apache/thrift v0.12.0/go.mod h1:cp2SuWMxlEZw2r+iP2GNCdIi4C1qmUzdZFSVb+bacwQ=
+github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973 h1:xJ4a3vCFaGF/jqvzLMYoU8P317H5OQ+Via4RmuPwCS0=
+github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24TaqPxmxbtue+5NUziq4I4S80YR8gNf3Q=
 github.com/btcsuite/btcd v0.0.0-20190213025234-306aecffea32/go.mod h1:DrZx5ec/dmnfpw9KyYoQyYo7d0KEvTkk/5M/vbZjAr8=
 github.com/btcsuite/btcd v0.0.0-20190523000118-16327141da8c h1:aEbSeNALREWXk0G7UdNhR3ayBV7tZ4M2PNmnrCAph6Q=
 github.com/btcsuite/btcd v0.0.0-20190523000118-16327141da8c/go.mod h1:3J08xEfcugPacsc34/LKRU2yO7YmuT8yt28J8k2+rrI=
@@ -18,8 +35,11 @@ github.com/btcsuite/winsvc v1.0.0/go.mod h1:jsenWakMcC0zFBFurPLEAyrnc/teJEM1O46f
 github.com/cheekybits/genny v1.0.0 h1:uGGa4nei+j20rOSeDeP5Of12XVm7TGUd4dJA9RDitfE=
 github.com/cheekybits/genny v1.0.0/go.mod h1:+tQajlRqAUrPI7DOSpB0XAqZYtQakVtB7wXkRAgjxjQ=
 github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
+github.com/coreos/go-semver v0.2.0/go.mod h1:nnelYz7RCh+5ahJtPPxZlU+153eP4D4r3EedlOD2RNk=
 github.com/coreos/go-semver v0.3.0 h1:wkHLiw0WNATZnSG7epLsujiMCgPAc9xhjJ4tgnAxmfM=
 github.com/coreos/go-semver v0.3.0/go.mod h1:nnelYz7RCh+5ahJtPPxZlU+153eP4D4r3EedlOD2RNk=
+github.com/cskr/pubsub v1.0.2 h1:vlOzMhl6PFn60gRlTQQsIfVwaPB/B/8MziK8FhEPt/0=
+github.com/cskr/pubsub v1.0.2/go.mod h1:/8MzYXk/NJAz782G8RPkFzXTZVu63VotefPnR9TIRis=
 github.com/davecgh/go-spew v0.0.0-20171005155431-ecdeabc65495/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
@@ -27,16 +47,51 @@ github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davidlazar/go-crypto v0.0.0-20170701192655-dcfb0a7ac018 h1:6xT9KW8zLC5IlbaIF5Q7JNieBoACT7iW0YTxQHR0in0=
 github.com/davidlazar/go-crypto v0.0.0-20170701192655-dcfb0a7ac018/go.mod h1:rQYf4tfk5sSwFsnDg3qYaBxSjsD9S8+59vW0dKUgme4=
+github.com/dgraph-io/badger v1.5.5-0.20190226225317-8115aed38f8f h1:6itBiEUtu+gOzXZWn46bM5/qm8LlV6/byR7Yflx/y6M=
 github.com/dgraph-io/badger v1.5.5-0.20190226225317-8115aed38f8f/go.mod h1:VZxzAIRPHRVNRKRo6AXrX9BJegn6il06VMTZVJYCIjQ=
+github.com/dgryski/go-farm v0.0.0-20190104051053-3adb47b1fb0f h1:dDxpBYafY/GYpcl+LS4Bn3ziLPuEdGRkRjYAbSlWxSA=
 github.com/dgryski/go-farm v0.0.0-20190104051053-3adb47b1fb0f/go.mod h1:SqUrOPUnsFjfmXRMNPybcSiG0BgUW2AuFH8PAnS2iTw=
+github.com/docker/distribution v2.7.1+incompatible/go.mod h1:J2gT2udsDAN96Uj4KfcMRqY0/ypR+oyYUYmja8H+y+w=
+github.com/docker/docker v0.7.3-0.20190315170154-87d593639c77/go.mod h1:eEKB0N0r5NX/I1kEveEz05bcu8tLC/8azJZsviup8Sk=
+github.com/docker/go-connections v0.4.0/go.mod h1:Gbd7IOopHjR8Iph03tsViu4nIes5XhDvyHbTtUxmeec=
+github.com/docker/go-units v0.3.3/go.mod h1:fgPhTUdO+D/Jk86RDLlptpiXQzgHJF7gydDDbaIK4Dk=
+github.com/dustin/go-humanize v1.0.0 h1:VSnTsYCnlFHaM2/igO1h6X3HA71jcobQuxemgkq4zYo=
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+github.com/eapache/go-resiliency v1.1.0/go.mod h1:kFI+JgMyC7bLPUVY133qvEBtVayf5mFgVsvEsIPBvNs=
+github.com/eapache/go-xerial-snappy v0.0.0-20180814174437-776d5712da21/go.mod h1:+020luEh2TKB4/GOp8oxxtq0Daoen/Cii55CzbTV6DU=
+github.com/eapache/queue v1.1.0/go.mod h1:6eCeP0CKFpHLu8blIFXhExK/dRa7WDZfr6jVFPTqq+I=
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+github.com/go-toolsmith/astequal v0.0.0-20180903214952-dcb477bfacd6/go.mod h1:H+xSiq0+LtiDC11+h1G32h7Of5O3CYFJ99GVbS5lDKY=
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@@ -46,14 +101,39 @@ github.com/golang/protobuf v1.3.0/go.mod h1:Qd/q+1AKNOZr9uGQzbzCmRO6sUih6GTPZv6a
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@@ -307,7 +597,11 @@ go.uber.org/multierr v1.1.0 h1:HoEmRHQPVSqub6w2z2d2EOVs2fjyFRGyofhKuyDq0QI=
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@@ -317,12 +611,21 @@ golang.org/x/crypto v0.0.0-20190513172903-22d7a77e9e5f/go.mod h1:yigFU9vqHzYiE8U
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