lotus/chain/validation/state.go

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package validation
import (
"context"
"fmt"
"math/rand"
"github.com/ipfs/go-cid"
"github.com/ipfs/go-datastore"
"github.com/ipfs/go-hamt-ipld"
blockstore "github.com/ipfs/go-ipfs-blockstore"
"github.com/minio/blake2b-simd"
cbg "github.com/whyrusleeping/cbor-gen"
"golang.org/x/xerrors"
vstate "github.com/filecoin-project/chain-validation/pkg/state"
vactors "github.com/filecoin-project/chain-validation/pkg/state/actors"
vaddress "github.com/filecoin-project/chain-validation/pkg/state/address"
vtypes "github.com/filecoin-project/chain-validation/pkg/state/types"
"github.com/filecoin-project/go-address"
"github.com/filecoin-project/lotus/chain/actors"
"github.com/filecoin-project/lotus/chain/gen"
"github.com/filecoin-project/lotus/chain/state"
"github.com/filecoin-project/lotus/chain/types"
"github.com/filecoin-project/lotus/chain/vm"
"github.com/filecoin-project/lotus/chain/wallet"
"github.com/filecoin-project/lotus/lib/crypto"
)
type StateWrapper struct {
// The blockstore underlying the state tree and storage.
bs blockstore.Blockstore
// HAMT-CBOR store on top of the blockstore.
cst *hamt.CborIpldStore
// A store for encryption keys.
keys *keyStore
// CID of the root of the state tree.
stateRoot cid.Cid
// The root node of the state tree, essentially a cache of LoadStateTree(cst, stateRoot)
//tree *state.StateTree
// A look-through storage implementation.
storage *directStorage
}
var _ vstate.Wrapper = &StateWrapper{}
func NewState() *StateWrapper {
bs := blockstore.NewBlockstore(datastore.NewMapDatastore())
cst := hamt.CSTFromBstore(bs)
// Put EmptyObjectCid value in the store. When an actor is initially created its Head is set to this value.
_, err := cst.Put(context.TODO(), map[string]string{})
if err != nil {
panic(err)
}
treeImpl, err := state.NewStateTree(cst)
if err != nil {
panic(err) // Never returns error, the error return should be removed.
}
root, err := treeImpl.Flush()
if err != nil {
panic(err)
}
storageImpl := &directStorage{cst}
return &StateWrapper{bs, cst, newKeyStore(), root, storageImpl}
}
func (s *StateWrapper) Cid() cid.Cid {
return s.stateRoot
}
func (s *StateWrapper) Actor(addr vaddress.Address) (vstate.Actor, error) {
vaddr, err := address.NewFromBytes(addr.Bytes())
if err != nil {
return nil, err
}
tree, err := state.LoadStateTree(s.cst, s.stateRoot)
if err != nil {
return nil, err
}
fcActor, err := tree.GetActor(vaddr)
if err != nil {
return nil, err
}
return &actorWrapper{*fcActor}, nil
}
func (s *StateWrapper) Storage(addr vaddress.Address) (vstate.Storage, error) {
return s.storage, nil
}
func (s *StateWrapper) NewAccountAddress() (vaddress.Address, error) {
return s.keys.NewAddress()
}
func (s *StateWrapper) SetActor(addr vaddress.Address, code vactors.ActorCodeID, balance vtypes.BigInt) (vstate.Actor, vstate.Storage, error) {
addrInt, err := address.NewFromBytes(addr.Bytes())
if err != nil {
return nil, nil, err
}
tree, err := state.LoadStateTree(s.cst, s.stateRoot)
if err != nil {
return nil, nil, err
}
actr := &actorWrapper{types.Actor{
Code: fromActorCode(code),
Balance: types.BigInt{balance.Int},
Head: vm.EmptyObjectCid,
}}
// The ID-based address is dropped here, but should be reported back to the caller.
_, err = tree.RegisterNewAddress(addrInt, &actr.Actor)
if err != nil {
return nil, nil, xerrors.Errorf("register new address for actor: %w", err)
}
return actr, s.storage, s.flush(tree)
}
func (s *StateWrapper) SetSingletonActor(addr vactors.SingletonActorID, balance vtypes.BigInt) (vstate.Actor, vstate.Storage, error) {
vaddr := fromSingletonAddress(addr)
tree, err := state.LoadStateTree(s.cst, s.stateRoot)
if err != nil {
return nil, nil, err
}
lotusAddr, err := address.NewFromBytes(vaddr.Bytes())
if err != nil {
return nil, nil, err
}
switch lotusAddr {
case actors.InitAddress:
initact, err := gen.SetupInitActor(s.bs, nil)
if err != nil {
return nil, nil, err
}
if err := tree.SetActor(actors.InitAddress, initact); err != nil {
return nil, nil, xerrors.Errorf("set init actor: %w", err)
}
return &actorWrapper{*initact}, s.storage, s.flush(tree)
case actors.StorageMarketAddress:
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nsroot, err := gen.SetupStorageMarketActor(s.bs, s.stateRoot, nil)
if err != nil {
return nil, nil, err
}
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s.stateRoot = nsroot
tree, err = state.LoadStateTree(s.cst, s.stateRoot)
if err != nil {
return nil, nil, err
}
smact, err := tree.GetActor(actors.StorageMarketAddress)
if err != nil {
return nil, nil, err
}
return &actorWrapper{*smact}, s.storage, s.flush(tree)
case actors.StoragePowerAddress:
spact, err := gen.SetupStoragePowerActor(s.bs)
if err != nil {
return nil, nil, err
}
if err := tree.SetActor(actors.StoragePowerAddress, spact); err != nil {
return nil, nil, xerrors.Errorf("set network storage market actor: %w", err)
}
return &actorWrapper{*spact}, s.storage, s.flush(tree)
case actors.NetworkAddress:
ntwkact := &types.Actor{
Code: actors.AccountCodeCid,
Balance: types.BigInt{balance.Int},
Head: vm.EmptyObjectCid,
}
if err := tree.SetActor(actors.NetworkAddress, ntwkact); err != nil {
return nil, nil, xerrors.Errorf("set network actor: %w", err)
}
return &actorWrapper{*ntwkact}, s.storage, s.flush(tree)
case actors.BurntFundsAddress:
ntwkact := &types.Actor{
Code: actors.AccountCodeCid,
Balance: types.BigInt{balance.Int},
Head: vm.EmptyObjectCid,
}
if err := tree.SetActor(actors.BurntFundsAddress, ntwkact); err != nil {
return nil, nil, xerrors.Errorf("set network actor: %w", err)
}
return &actorWrapper{*ntwkact}, s.storage, s.flush(tree)
default:
return nil, nil, xerrors.Errorf("%v is not a singleton actor address", addr)
}
}
func (s *StateWrapper) Sign(ctx context.Context, addr vaddress.Address, data []byte) (*vtypes.Signature, error) {
sig, err := s.keys.Sign(ctx, addr, data)
if err != nil {
return nil, err
}
return &vtypes.Signature{
Type: sig.Type,
Data: sig.Data,
}, nil
}
func (s *StateWrapper) Signer() *keyStore {
return s.keys
}
// Flushes a state tree to storage and sets this state's root to that tree's root CID.
func (s *StateWrapper) flush(tree *state.StateTree) (err error) {
s.stateRoot, err = tree.Flush()
return
}
//
// Key store
//
type keyStore struct {
// Private keys by address
keys map[vaddress.Address]vtypes.KeyInfo
// Seed for deterministic key generation.
seed int64
}
func newKeyStore() *keyStore {
return &keyStore{
keys: make(map[vaddress.Address]vtypes.KeyInfo),
seed: 0,
}
}
func (s *keyStore) NewAddress() (vaddress.Address, error) {
randSrc := rand.New(rand.NewSource(s.seed))
prv, err := crypto.GenerateKeyFromSeed(randSrc)
if err != nil {
return vaddress.Undef, err
}
vki := vtypes.KeyInfo{
PrivateKey: prv,
Type: types.KTSecp256k1,
}
key, err := wallet.NewKey(types.KeyInfo{
Type: vki.Type,
PrivateKey: vki.PrivateKey,
})
if err != nil {
return vaddress.Undef, err
}
vaddr, err := vaddress.NewFromBytes(key.Address.Bytes())
if err != nil {
return vaddress.Undef, err
}
s.keys[vaddr] = vki
s.seed++
return vaddress.NewFromBytes(key.Address.Bytes())
}
func (s *keyStore) Sign(ctx context.Context, addr vaddress.Address, data []byte) (*types.Signature, error) {
ki, ok := s.keys[addr]
if !ok {
return &types.Signature{}, fmt.Errorf("unknown address %v", addr)
}
b2sum := blake2b.Sum256(data)
digest, err := crypto.Sign(ki.PrivateKey, b2sum[:])
if err != nil {
return &types.Signature{}, err
}
return &types.Signature{
Type: types.KTSecp256k1,
Data: digest,
}, nil
}
//
// Actor Wrapper
//
type actorWrapper struct {
types.Actor
}
func (a *actorWrapper) Code() cid.Cid {
return a.Actor.Code
}
func (a *actorWrapper) Head() cid.Cid {
return a.Actor.Head
}
func (a *actorWrapper) Nonce() uint64 {
return a.Actor.Nonce
}
func (a *actorWrapper) Balance() vtypes.BigInt {
return vtypes.NewInt(a.Actor.Balance.Uint64())
}
//
// Storage
//
type directStorage struct {
cst *hamt.CborIpldStore
}
func (d *directStorage) Get(c cid.Cid, out interface{}) error {
if err := d.cst.Get(context.TODO(), c, out.(cbg.CBORUnmarshaler)); err != nil {
return err
}
return nil
}
func fromActorCode(code vactors.ActorCodeID) cid.Cid {
switch code {
case vactors.AccountActorCodeCid:
return actors.AccountCodeCid
case vactors.StorageMinerCodeCid:
return actors.StorageMinerCodeCid
case vactors.MultisigActorCodeCid:
return actors.MultisigCodeCid
case vactors.PaymentChannelActorCodeCid:
return actors.PaymentChannelCodeCid
default:
panic(fmt.Errorf("unknown actor code: %v", code))
}
}
func fromSingletonAddress(addr vactors.SingletonActorID) vaddress.Address {
switch addr {
case vactors.InitAddress:
out, err := vaddress.NewFromBytes(actors.InitAddress.Bytes())
if err != nil {
panic(err)
}
return out
case vactors.NetworkAddress:
out, err := vaddress.NewFromBytes(actors.NetworkAddress.Bytes())
if err != nil {
panic(err)
}
return out
case vactors.StorageMarketAddress:
out, err := vaddress.NewFromBytes(actors.StorageMarketAddress.Bytes())
if err != nil {
panic(err)
}
return out
case vactors.BurntFundsAddress:
out, err := vaddress.NewFromBytes(actors.BurntFundsAddress.Bytes())
if err != nil {
panic(err)
}
return out
case vactors.StoragePowerAddress:
out, err := vaddress.NewFromBytes(actors.StoragePowerAddress.Bytes())
if err != nil {
panic(err)
}
return out
default:
panic(fmt.Errorf("unknown singleton actor address: %v", addr))
}
}