Merge pull request #987 from filecoin-project/feat/chainget

Implement 'chain get' for easier ipld digging

api/api_full.go

@@ -35,6 +35,7 @@ type FullNode interface {
 	ChainSetHead(context.Context, *types.TipSet) error
 	ChainGetGenesis(context.Context) (*types.TipSet, error)
 	ChainTipSetWeight(context.Context, *types.TipSet) (types.BigInt, error)
+	ChainGetNode(ctx context.Context, p string) (interface{}, error)
 
 	// syncer
 	SyncState(context.Context) (*SyncState, error)

api/apistruct/struct.go

@@ -53,6 +53,7 @@ type FullNodeStruct struct {
 		ChainSetHead           func(context.Context, *types.TipSet) error                          `perm:"admin"`
 		ChainGetGenesis        func(context.Context) (*types.TipSet, error)                        `perm:"read"`
 		ChainTipSetWeight      func(context.Context, *types.TipSet) (types.BigInt, error)          `perm:"read"`
+		ChainGetNode           func(ctx context.Context, p string) (interface{}, error)            `perm:"read"`
 
 		SyncState          func(context.Context) (*api.SyncState, error)                `perm:"read"`
 		SyncSubmitBlock    func(ctx context.Context, blk *types.BlockMsg) error         `perm:"write"`
@@ -343,6 +344,10 @@ func (c *FullNodeStruct) ChainTipSetWeight(ctx context.Context, ts *types.TipSet
 	return c.Internal.ChainTipSetWeight(ctx, ts)
 }
 
+func (c *FullNodeStruct) ChainGetNode(ctx context.Context, p string) (interface{}, error) {
+	return c.Internal.ChainGetNode(ctx, p)
+}
+
 func (c *FullNodeStruct) SyncState(ctx context.Context) (*api.SyncState, error) {
 	return c.Internal.SyncState(ctx)
 }

chain/actors/actor_miner.go

@@ -391,7 +391,7 @@ func (sma StorageMinerActor) ProveCommitSector(act *types.Actor, vmctx types.VMC
 	}
 
 	_, err = vmctx.Send(StorageMarketAddress, SMAMethods.ActivateStorageDeals, types.NewInt(0), activateParams)
-	return nil, err
+	return nil, aerrors.Wrapf(err, "calling ActivateStorageDeals failed")
 }
 
 func truncateHexPrint(b []byte) string {
@@ -954,8 +954,8 @@ func onSuccessfulPoSt(self *StorageMinerActorState, vmctx types.VMContext) aerro
 	if !(oldPower.IsZero() && newPower.IsZero()) {
 		enc, err := SerializeParams(&UpdateStorageParams{
 			Delta:                 delta,
-			NextProvingPeriodEnd:     vmctx.BlockHeight() + build.SlashablePowerDelay,
+			NextSlashDeadline:     vmctx.BlockHeight() + build.SlashablePowerDelay,
-			PreviousProvingPeriodEnd: prevSlashingDeadline,
+			PreviousSlashDeadline: prevSlashingDeadline,
 		})
 		if err != nil {
 			return err
@@ -963,7 +963,7 @@ func onSuccessfulPoSt(self *StorageMinerActorState, vmctx types.VMContext) aerro
 
 		_, err = vmctx.Send(StoragePowerAddress, SPAMethods.UpdateStorage, types.NewInt(0), enc)
 		if err != nil {
-			return err
+			return aerrors.Wrap(err, "updating storage failed")
 		}
 	}
 

chain/actors/actor_storagepower.go

@@ -268,8 +268,8 @@ func shouldSlash(block1, block2 *types.BlockHeader) bool {
 
 type UpdateStorageParams struct {
 	Delta                 types.BigInt
-	NextProvingPeriodEnd     uint64
+	NextSlashDeadline     uint64
-	PreviousProvingPeriodEnd uint64
+	PreviousSlashDeadline uint64
 }
 
 func (spa StoragePowerActor) UpdateStorage(act *types.Actor, vmctx types.VMContext, params *UpdateStorageParams) ([]byte, ActorError) {
@@ -289,10 +289,10 @@ func (spa StoragePowerActor) UpdateStorage(act *types.Actor, vmctx types.VMConte
 
 	self.TotalStorage = types.BigAdd(self.TotalStorage, params.Delta)
 
-	previousBucket := params.PreviousProvingPeriodEnd % build.SlashablePowerDelay
+	previousBucket := params.PreviousSlashDeadline % build.SlashablePowerDelay
-	nextBucket := params.NextProvingPeriodEnd % build.SlashablePowerDelay
+	nextBucket := params.NextSlashDeadline % build.SlashablePowerDelay
 
-	if previousBucket == nextBucket && params.PreviousProvingPeriodEnd != 0 {
+	if previousBucket == nextBucket && params.PreviousSlashDeadline != 0 {
 		nroot, err := vmctx.Storage().Put(&self)
 		if err != nil {
 			return nil, err
@@ -310,10 +310,10 @@ func (spa StoragePowerActor) UpdateStorage(act *types.Actor, vmctx types.VMConte
 		return nil, aerrors.HandleExternalError(eerr, "loading proving buckets amt")
 	}
 
-	if params.PreviousProvingPeriodEnd != 0 { // delete from previous bucket
+	if params.PreviousSlashDeadline != 0 { // delete from previous bucket
 		err := deleteMinerFromBucket(vmctx, buckets, previousBucket)
 		if err != nil {
-			return nil, err
+			return nil, aerrors.Wrapf(err, "delete from bucket %d, next %d", previousBucket, nextBucket)
 		}
 	}
 

chain/actors/cbor_gen.go

@@ -2866,13 +2866,13 @@ func (t *UpdateStorageParams) MarshalCBOR(w io.Writer) error {
 		return err
 	}
 
-	// t.NextProvingPeriodEnd (uint64) (uint64)
+	// t.NextSlashDeadline (uint64) (uint64)
-	if _, err := w.Write(cbg.CborEncodeMajorType(cbg.MajUnsignedInt, uint64(t.NextProvingPeriodEnd))); err != nil {
+	if _, err := w.Write(cbg.CborEncodeMajorType(cbg.MajUnsignedInt, uint64(t.NextSlashDeadline))); err != nil {
 		return err
 	}
 
-	// t.PreviousProvingPeriodEnd (uint64) (uint64)
+	// t.PreviousSlashDeadline (uint64) (uint64)
-	if _, err := w.Write(cbg.CborEncodeMajorType(cbg.MajUnsignedInt, uint64(t.PreviousProvingPeriodEnd))); err != nil {
+	if _, err := w.Write(cbg.CborEncodeMajorType(cbg.MajUnsignedInt, uint64(t.PreviousSlashDeadline))); err != nil {
 		return err
 	}
 	return nil
@@ -2902,7 +2902,7 @@ func (t *UpdateStorageParams) UnmarshalCBOR(r io.Reader) error {
 		}
 
 	}
-	// t.NextProvingPeriodEnd (uint64) (uint64)
+	// t.NextSlashDeadline (uint64) (uint64)
 
 	maj, extra, err = cbg.CborReadHeader(br)
 	if err != nil {
@@ -2911,8 +2911,8 @@ func (t *UpdateStorageParams) UnmarshalCBOR(r io.Reader) error {
 	if maj != cbg.MajUnsignedInt {
 		return fmt.Errorf("wrong type for uint64 field")
 	}
-	t.NextProvingPeriodEnd = uint64(extra)
+	t.NextSlashDeadline = uint64(extra)
-	// t.PreviousProvingPeriodEnd (uint64) (uint64)
+	// t.PreviousSlashDeadline (uint64) (uint64)
 
 	maj, extra, err = cbg.CborReadHeader(br)
 	if err != nil {
@@ -2921,7 +2921,7 @@ func (t *UpdateStorageParams) UnmarshalCBOR(r io.Reader) error {
 	if maj != cbg.MajUnsignedInt {
 		return fmt.Errorf("wrong type for uint64 field")
 	}
-	t.PreviousProvingPeriodEnd = uint64(extra)
+	t.PreviousSlashDeadline = uint64(extra)
 	return nil
 }
 

chain/vm/vm.go

@@ -467,7 +467,7 @@ func (vm *VM) ApplyMessage(ctx context.Context, msg *types.Message) (*ApplyRet,
 	ret, actorErr, vmctx := vm.send(ctx, msg, nil, msgGasCost)
 
 	if aerrors.IsFatal(actorErr) {
-		return nil, xerrors.Errorf("fatal error: %w", actorErr)
+		return nil, xerrors.Errorf("[from=%s,to=%s,n=%d,m=%d,h=%d] fatal error: %w", msg.From, msg.To, msg.Nonce, msg.Method, vm.blockHeight, actorErr)
 	}
 	if actorErr != nil {
 		log.Warnf("[from=%s,to=%s,n=%d,m=%d,h=%d] Send actor error: %+v", msg.From, msg.To, msg.Nonce, msg.Method, vm.blockHeight, actorErr)

cli/chain.go

@@ -25,6 +25,7 @@ var chainCmd = &cli.Command{
 		chainGetMsgCmd,
 		chainSetHeadCmd,
 		chainListCmd,
+		chainGetCmd,
 	},
 }
 
@@ -336,6 +337,41 @@ var chainListCmd = &cli.Command{
 	},
 }
 
+var chainGetCmd = &cli.Command{
+	Name:  "get",
+	Usage: "Get chain DAG node by path",
+	Description: `Get ipld node under a specified path:
+
+   lotus chain get /ipfs/[cid]/some/path
+
+   Note:
+   You can use special path elements to traverse through some data structures:
+   - /ipfs/[cid]/@H:elem - get 'elem' from hamt
+   - /ipfs/[cid]/@Ha:t01 - get element under Addr(t01).Bytes
+   - /ipfs/[cid]/@A:10 - get 10th amt element
+`,
+	Action: func(cctx *cli.Context) error {
+		api, closer, err := GetFullNodeAPI(cctx)
+		if err != nil {
+			return err
+		}
+		defer closer()
+		ctx := ReqContext(cctx)
+
+		nd, err := api.ChainGetNode(ctx, cctx.Args().First())
+		if err != nil {
+			return err
+		}
+
+		b, err := json.MarshalIndent(nd, "", "\t")
+		if err != nil {
+			return err
+		}
+		fmt.Println(string(b))
+		return nil
+	},
+}
+
 func printTipSet(format string, ts *types.TipSet) {
 	format = strings.ReplaceAll(format, "<height>", fmt.Sprint(ts.Height()))
 	format = strings.ReplaceAll(format, "<time>", time.Unix(int64(ts.MinTimestamp()), 0).Format(time.Stamp))

go.mod

@@ -44,6 +44,7 @@ require (
 	github.com/ipfs/go-ipld-format v0.0.2
 	github.com/ipfs/go-log v1.0.0
 	github.com/ipfs/go-merkledag v0.2.4
+	github.com/ipfs/go-path v0.0.7
 	github.com/ipfs/go-unixfs v0.2.2-0.20190827150610-868af2e9e5cb
 	github.com/ipld/go-ipld-prime v0.0.2-0.20191025154717-8dff1cbec43b
 	github.com/ipsn/go-secp256k1 v0.0.0-20180726113642-9d62b9f0bc52

go.sum

@@ -48,6 +48,7 @@ github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDk
 github.com/coreos/etcd v3.3.10+incompatible/go.mod h1:uF7uidLiAD3TWHmW31ZFd/JWoc32PjwdhPthX9715RE=
 github.com/coreos/go-etcd v2.0.0+incompatible/go.mod h1:Jez6KQU2B/sWsbdaef3ED8NzMklzPG4d5KIOhIy30Tk=
 github.com/coreos/go-semver v0.2.0/go.mod h1:nnelYz7RCh+5ahJtPPxZlU+153eP4D4r3EedlOD2RNk=
+github.com/coreos/go-semver v0.2.1-0.20180108230905-e214231b295a/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/cpuguy83/go-md2man v1.0.10/go.mod h1:SmD6nW6nTyfqj6ABTjUi3V3JVMnlJmwcJI5acqYI6dE=
@@ -151,6 +152,7 @@ github.com/influxdata/influxdb1-client v0.0.0-20190809212627-fc22c7df067e/go.mod
 github.com/ipfs/bbloom v0.0.1/go.mod h1:oqo8CVWsJFMOZqTglBG4wydCE4IQA/G2/SEofB0rjUI=
 github.com/ipfs/bbloom v0.0.4 h1:Gi+8EGJ2y5qiD5FbsbpX/TMNcJw8gSqr7eyjHa4Fhvs=
 github.com/ipfs/bbloom v0.0.4/go.mod h1:cS9YprKXpoZ9lT0n/Mw/a6/aFV6DTjTLYHeA+gyqMG0=
+github.com/ipfs/go-bitswap v0.0.9/go.mod h1:kAPf5qgn2W2DrgAcscZ3HrM9qh4pH+X8Fkk3UPrwvis=
 github.com/ipfs/go-bitswap v0.1.0/go.mod h1:FFJEf18E9izuCqUtHxbWEvq+reg7o4CW5wSAE1wsxj0=
 github.com/ipfs/go-bitswap v0.1.2/go.mod h1:qxSWS4NXGs7jQ6zQvoPY3+NmOfHHG47mhkiLzBpJQIs=
 github.com/ipfs/go-bitswap v0.1.3/go.mod h1:YEQlFy0kkxops5Vy+OxWdRSEZIoS7I7KDIwoa5Chkps=
@@ -159,6 +161,7 @@ github.com/ipfs/go-bitswap v0.1.8/go.mod h1:TOWoxllhccevbWFUR2N7B1MTSVVge1s6XSMi
 github.com/ipfs/go-block-format v0.0.1/go.mod h1:DK/YYcsSUIVAFNwo/KZCdIIbpN0ROH/baNLgayt4pFc=
 github.com/ipfs/go-block-format v0.0.2 h1:qPDvcP19izTjU8rgo6p7gTXZlkMkF5bz5G3fqIsSCPE=
 github.com/ipfs/go-block-format v0.0.2/go.mod h1:AWR46JfpcObNfg3ok2JHDUfdiHRgWhJgCQF+KIgOPJY=
+github.com/ipfs/go-blockservice v0.0.7/go.mod h1:EOfb9k/Y878ZTRY/CH0x5+ATtaipfbRhbvNSdgc/7So=
 github.com/ipfs/go-blockservice v0.1.0/go.mod h1:hzmMScl1kXHg3M2BjTymbVPjv627N7sYcvYaKbop39M=
 github.com/ipfs/go-blockservice v0.1.3-0.20190908200855-f22eea50656c h1:lN5IQA07VtLiTLAp/Scezp1ljFhXErC6yq4O1cu+yJ0=
 github.com/ipfs/go-blockservice v0.1.3-0.20190908200855-f22eea50656c/go.mod h1:t+411r7psEUhLueM8C7aPA7cxCclv4O3VsUVxt9kz2I=
@@ -213,6 +216,7 @@ github.com/ipfs/go-ipfs-posinfo v0.0.1 h1:Esoxj+1JgSjX0+ylc0hUmJCOv6V2vFoZiETLR6
 github.com/ipfs/go-ipfs-posinfo v0.0.1/go.mod h1:SwyeVP+jCwiDu0C313l/8jg6ZxM0qqtlt2a0vILTc1A=
 github.com/ipfs/go-ipfs-pq v0.0.1 h1:zgUotX8dcAB/w/HidJh1zzc1yFq6Vm8J7T2F4itj/RU=
 github.com/ipfs/go-ipfs-pq v0.0.1/go.mod h1:LWIqQpqfRG3fNc5XsnIhz/wQ2XXGyugQwls7BgUmUfY=
+github.com/ipfs/go-ipfs-routing v0.0.1/go.mod h1:k76lf20iKFxQTjcJokbPM9iBXVXVZhcOwc360N4nuKs=
 github.com/ipfs/go-ipfs-routing v0.1.0 h1:gAJTT1cEeeLj6/DlLX6t+NxD9fQe2ymTO6qWRDI/HQQ=
 github.com/ipfs/go-ipfs-routing v0.1.0/go.mod h1:hYoUkJLyAUKhF58tysKpids8RNDPO42BVMgK5dNsoqY=
 github.com/ipfs/go-ipfs-util v0.0.1 h1:Wz9bL2wB2YBJqggkA4dD7oSmqB4cAnpNbGrlHJulv50=
@@ -226,12 +230,16 @@ github.com/ipfs/go-ipld-format v0.0.2/go.mod h1:4B6+FM2u9OJ9zCV+kSbgFAZlOrv1Hqbf
 github.com/ipfs/go-log v0.0.1/go.mod h1:kL1d2/hzSpI0thNYjiKfjanbVNU+IIGA/WnNESY9leM=
 github.com/ipfs/go-log v1.0.0 h1:BW3LQIiZzpNyolt84yvKNCd3FU+AK4VDw1hnHR+1aiI=
 github.com/ipfs/go-log v1.0.0/go.mod h1:JO7RzlMK6rA+CIxFMLOuB6Wf5b81GDiKElL7UPSIKjA=
+github.com/ipfs/go-merkledag v0.0.6/go.mod h1:QYPdnlvkOg7GnQRofu9XZimC5ZW5Wi3bKys/4GQQfto=
 github.com/ipfs/go-merkledag v0.1.0/go.mod h1:SQiXrtSts3KGNmgOzMICy5c0POOpUNQLvB3ClKnBAlk=
 github.com/ipfs/go-merkledag v0.2.3/go.mod h1:SQiXrtSts3KGNmgOzMICy5c0POOpUNQLvB3ClKnBAlk=
 github.com/ipfs/go-merkledag v0.2.4 h1:ZSHQSe9BENfixUjT+MaLeHEeZGxrZQfgo3KT3SLosF8=
 github.com/ipfs/go-merkledag v0.2.4/go.mod h1:SQiXrtSts3KGNmgOzMICy5c0POOpUNQLvB3ClKnBAlk=
 github.com/ipfs/go-metrics-interface v0.0.1 h1:j+cpbjYvu4R8zbleSs36gvB7jR+wsL2fGD6n0jO4kdg=
 github.com/ipfs/go-metrics-interface v0.0.1/go.mod h1:6s6euYU4zowdslK0GKHmqaIZ3j/b/tL7HTWtJ4VPgWY=
+github.com/ipfs/go-path v0.0.7 h1:H06hKMquQ0aYtHiHryOMLpQC1qC3QwXwkahcEVD51Ho=
+github.com/ipfs/go-path v0.0.7/go.mod h1:6KTKmeRnBXgqrTvzFrPV3CamxcgvXX/4z79tfAd2Sno=
+github.com/ipfs/go-peertaskqueue v0.0.4/go.mod h1:03H8fhyeMfKNFWqzYEVyMbcPUeYrqP1MX6Kd+aN+rMQ=
 github.com/ipfs/go-peertaskqueue v0.1.0/go.mod h1:Jmk3IyCcfl1W3jTW3YpghSwSEC6IJ3Vzz/jUmWw8Z0U=
 github.com/ipfs/go-peertaskqueue v0.1.1 h1:+gPjbI+V3NktXZOqJA1kzbms2pYmhjgQQal0MzZrOAY=
 github.com/ipfs/go-peertaskqueue v0.1.1/go.mod h1:Jmk3IyCcfl1W3jTW3YpghSwSEC6IJ3Vzz/jUmWw8Z0U=
@@ -287,22 +295,27 @@ github.com/libp2p/go-buffer-pool v0.0.1/go.mod h1:xtyIz9PMobb13WaxR6Zo1Pd1zXJKYg
 github.com/libp2p/go-buffer-pool v0.0.2 h1:QNK2iAFa8gjAe1SPz6mHSMuCcjs+X1wlHzeOSqcmlfs=
 github.com/libp2p/go-buffer-pool v0.0.2/go.mod h1:MvaB6xw5vOrDl8rYZGLFdKAuk/hRoRZd1Vi32+RXyFM=
 github.com/libp2p/go-conn-security v0.0.1/go.mod h1:bGmu51N0KU9IEjX7kl2PQjgZa40JQWnayTvNMgD/vyk=
+github.com/libp2p/go-conn-security-multistream v0.0.2/go.mod h1:nc9vud7inQ+d6SO0I/6dSWrdMnHnzZNHeyUQqrAJulE=
 github.com/libp2p/go-conn-security-multistream v0.1.0 h1:aqGmto+ttL/uJgX0JtQI0tD21CIEy5eYd1Hlp0juHY0=
 github.com/libp2p/go-conn-security-multistream v0.1.0/go.mod h1:aw6eD7LOsHEX7+2hJkDxw1MteijaVcI+/eP2/x3J1xc=
 github.com/libp2p/go-eventbus v0.1.0 h1:mlawomSAjjkk97QnYiEmHsLu7E136+2oCWSHRUvMfzQ=
 github.com/libp2p/go-eventbus v0.1.0/go.mod h1:vROgu5cs5T7cv7POWlWxBaVLxfSegC5UGQf8A2eEmx4=
 github.com/libp2p/go-flow-metrics v0.0.1 h1:0gxuFd2GuK7IIP5pKljLwps6TvcuYgvG7Atqi3INF5s=
 github.com/libp2p/go-flow-metrics v0.0.1/go.mod h1:Iv1GH0sG8DtYN3SVJ2eG221wMiNpZxBdp967ls1g+k8=
+github.com/libp2p/go-libp2p v0.0.30/go.mod h1:XWT8FGHlhptAv1+3V/+J5mEpzyui/5bvFsNuWYs611A=
 github.com/libp2p/go-libp2p v0.1.0/go.mod h1:6D/2OBauqLUoqcADOJpn9WbKqvaM07tDw68qHM0BxUM=
 github.com/libp2p/go-libp2p v0.1.1/go.mod h1:I00BRo1UuUSdpuc8Q2mN7yDF/oTUTRAX6JWpTiK9Rp8=
 github.com/libp2p/go-libp2p v0.4.2 h1:p0cthB0jDNHO4gH2HzS8/nAMMXbfUlFHs0jwZ4U+F2g=
 github.com/libp2p/go-libp2p v0.4.2/go.mod h1:MNmgUxUw5pMsdOzMlT0EE7oKjRasl+WyVwM0IBlpKgQ=
+github.com/libp2p/go-libp2p-autonat v0.0.6/go.mod h1:uZneLdOkZHro35xIhpbtTzLlgYturpu4J5+0cZK3MqE=
 github.com/libp2p/go-libp2p-autonat v0.1.0/go.mod h1:1tLf2yXxiE/oKGtDwPYWTSYG3PtvYlJmg7NeVtPRqH8=
 github.com/libp2p/go-libp2p-autonat v0.1.1 h1:WLBZcIRsjZlWdAZj9CiBSvU2wQXoUOiS1Zk1tM7DTJI=
 github.com/libp2p/go-libp2p-autonat v0.1.1/go.mod h1:OXqkeGOY2xJVWKAGV2inNF5aKN/djNA3fdpCWloIudE=
+github.com/libp2p/go-libp2p-blankhost v0.0.1/go.mod h1:Ibpbw/7cPPYwFb7PACIWdvxxv0t0XCCI10t7czjAjTc=
 github.com/libp2p/go-libp2p-blankhost v0.1.1/go.mod h1:pf2fvdLJPsC1FsVrNP3DUUvMzUts2dsLLBEpo1vW1ro=
 github.com/libp2p/go-libp2p-blankhost v0.1.4 h1:I96SWjR4rK9irDHcHq3XHN6hawCRTPUADzkJacgZLvk=
 github.com/libp2p/go-libp2p-blankhost v0.1.4/go.mod h1:oJF0saYsAXQCSfDq254GMNmLNz6ZTHTOvtF4ZydUvwU=
+github.com/libp2p/go-libp2p-circuit v0.0.9/go.mod h1:uU+IBvEQzCu953/ps7bYzC/D/R0Ho2A9LfKVVCatlqU=
 github.com/libp2p/go-libp2p-circuit v0.1.0/go.mod h1:Ahq4cY3V9VJcHcn1SBXjr78AbFkZeIRmfunbA7pmFh8=
 github.com/libp2p/go-libp2p-circuit v0.1.4 h1:Phzbmrg3BkVzbqd4ZZ149JxCuUWu2wZcXf/Kr6hZJj8=
 github.com/libp2p/go-libp2p-circuit v0.1.4/go.mod h1:CY67BrEjKNDhdTk8UgBX1Y/H5c3xkAcs3gnksxY7osU=
@@ -317,21 +330,28 @@ github.com/libp2p/go-libp2p-core v0.2.2/go.mod h1:8fcwTbsG2B+lTgRJ1ICZtiM5GWCWZV
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@@ -339,12 +359,16 @@ github.com/libp2p/go-libp2p-nat v0.0.4/go.mod h1:N9Js/zVtAXqaeT99cXgTV9e75KpnWCv
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@@ -352,10 +376,12 @@ github.com/libp2p/go-libp2p-peerstore v0.1.4/go.mod h1:+4BDbDiiKf4PzpANZDAT+knVd
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@@ -364,13 +390,16 @@ github.com/libp2p/go-libp2p-routing v0.1.0 h1:hFnj3WR3E2tOcKaGpyzfP4gvFZ3t8JkQmb
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@@ -378,16 +407,23 @@ github.com/libp2p/go-libp2p-testing v0.1.0 h1:WaFRj/t3HdMZGNZqnU2pS7pDRBmMeoDx7/
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@@ -405,15 +441,21 @@ github.com/libp2p/go-reuseport v0.0.1/go.mod h1:jn6RmB1ufnQwl0Q1f+YxAj8isJgDCQza
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@@ -482,6 +524,7 @@ github.com/multiformats/go-multihash v0.0.8/go.mod h1:YSLudS+Pi8NHE7o6tb3D8vrpKa
 github.com/multiformats/go-multihash v0.0.10 h1:lMoNbh2Ssd9PUF74Nz008KGzGPlfeV6wH3rit5IIGCM=
 github.com/multiformats/go-multihash v0.0.10/go.mod h1:YSLudS+Pi8NHE7o6tb3D8vrpKa63epEDmG8nTduyAew=
 github.com/multiformats/go-multistream v0.0.1/go.mod h1:fJTiDfXJVmItycydCnNx4+wSzZ5NwG2FEVAI30fiovg=
+github.com/multiformats/go-multistream v0.0.4/go.mod h1:fJTiDfXJVmItycydCnNx4+wSzZ5NwG2FEVAI30fiovg=
 github.com/multiformats/go-multistream v0.1.0 h1:UpO6jrsjqs46mqAK3n6wKRYFhugss9ArzbyUzU+4wkQ=
 github.com/multiformats/go-multistream v0.1.0/go.mod h1:fJTiDfXJVmItycydCnNx4+wSzZ5NwG2FEVAI30fiovg=
 github.com/multiformats/go-varint v0.0.1 h1:TR/0rdQtnNxuN2IhiB639xC3tWM4IUi7DkTBVTdGW/M=
@@ -676,6 +719,7 @@ golang.org/x/sys v0.0.0-20190302025703-b6889370fb10/go.mod h1:STP8DvDyc/dI5b8T5h
 golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190502145724-3ef323f4f1fd/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190524122548-abf6ff778158/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20190524152521-dbbf3f1254d4/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190526052359-791d8a0f4d09/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190610200419-93c9922d18ae/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190626221950-04f50cda93cb/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=

node/impl/full/chain.go

@@ -2,14 +2,29 @@ package full
 
 import (
 	"context"
+	"fmt"
+	"strconv"
+	"strings"
 
-	"github.com/filecoin-project/lotus/api"
+	"github.com/filecoin-project/go-amt-ipld"
-	"github.com/filecoin-project/lotus/chain/store"
+	"github.com/ipfs/go-blockservice"
-	"github.com/filecoin-project/lotus/chain/types"
+	"github.com/ipfs/go-cid"
+	"github.com/ipfs/go-hamt-ipld"
+	blockstore "github.com/ipfs/go-ipfs-blockstore"
+	offline "github.com/ipfs/go-ipfs-exchange-offline"
+	cbor "github.com/ipfs/go-ipld-cbor"
+	ipld "github.com/ipfs/go-ipld-format"
+	"github.com/ipfs/go-merkledag"
+	"github.com/ipfs/go-path"
+	"github.com/ipfs/go-path/resolver"
+	mh "github.com/multiformats/go-multihash"
+	"go.uber.org/fx"
 	"golang.org/x/xerrors"
 
-	"github.com/ipfs/go-cid"
+	"github.com/filecoin-project/lotus/api"
-	"go.uber.org/fx"
+	"github.com/filecoin-project/lotus/chain/address"
+	"github.com/filecoin-project/lotus/chain/store"
+	"github.com/filecoin-project/lotus/chain/types"
 )
 
 type ChainAPI struct {
@@ -164,3 +179,123 @@ func (a *ChainAPI) ChainGetGenesis(ctx context.Context) (*types.TipSet, error) {
 func (a *ChainAPI) ChainTipSetWeight(ctx context.Context, ts *types.TipSet) (types.BigInt, error) {
 	return a.Chain.Weight(ctx, ts)
 }
+
+func resolveOnce(bs blockstore.Blockstore) func(ctx context.Context, ds ipld.NodeGetter, nd ipld.Node, names []string) (*ipld.Link, []string, error) {
+	return func(ctx context.Context, ds ipld.NodeGetter, nd ipld.Node, names []string) (*ipld.Link, []string, error) {
+		if strings.HasPrefix(names[0], "@Ha:") {
+			addr, err := address.NewFromString(names[0][4:])
+			if err != nil {
+				return nil, nil, xerrors.Errorf("parsing addr: %w", err)
+			}
+
+			names[0] = "@H:" + string(addr.Bytes())
+		}
+
+		if strings.HasPrefix(names[0], "@H:") {
+			cst := hamt.CSTFromBstore(bs)
+
+			h, err := hamt.LoadNode(ctx, cst, nd.Cid())
+			if err != nil {
+				return nil, nil, xerrors.Errorf("resolving hamt link: %w", err)
+			}
+
+			var m interface{}
+			if err := h.Find(ctx, names[0][3:], &m); err != nil {
+				return nil, nil, xerrors.Errorf("resolve hamt: %w", err)
+			}
+			if c, ok := m.(cid.Cid); ok {
+				return &ipld.Link{
+					Name: names[0][3:],
+					Cid:  c,
+				}, names[1:], nil
+			}
+
+			n, err := cbor.WrapObject(m, mh.SHA2_256, 32)
+			if err != nil {
+				return nil, nil, err
+			}
+
+			if err := bs.Put(n); err != nil {
+				return nil, nil, xerrors.Errorf("put hamt val: %w", err)
+			}
+
+			if len(names) == 1 {
+				return &ipld.Link{
+					Name: names[0][3:],
+					Cid:  n.Cid(),
+				}, nil, nil
+			}
+
+			return resolveOnce(bs)(ctx, ds, n, names[1:])
+		}
+
+		if strings.HasPrefix(names[0], "@A:") {
+			a, err := amt.LoadAMT(amt.WrapBlockstore(bs), nd.Cid())
+			if err != nil {
+				return nil, nil, xerrors.Errorf("load amt: %w", err)
+			}
+
+			idx, err := strconv.ParseUint(names[0][3:], 10, 64)
+			if err != nil {
+				return nil, nil, xerrors.Errorf("parsing amt index: %w", err)
+			}
+
+			var m interface{}
+			if err := a.Get(idx, &m); err != nil {
+				return nil, nil, xerrors.Errorf("amt get: %w", err)
+			}
+			fmt.Printf("AG %T %v\n", m, m)
+			if c, ok := m.(cid.Cid); ok {
+				return &ipld.Link{
+					Name: names[0][3:],
+					Cid:  c,
+				}, names[1:], nil
+			}
+
+			n, err := cbor.WrapObject(m, mh.SHA2_256, 32)
+			if err != nil {
+				return nil, nil, err
+			}
+
+			if err := bs.Put(n); err != nil {
+				return nil, nil, xerrors.Errorf("put amt val: %w", err)
+			}
+
+			if len(names) == 1 {
+				return &ipld.Link{
+					Name: names[0][3:],
+					Size: 0,
+					Cid:  n.Cid(),
+				}, nil, nil
+			}
+
+			return resolveOnce(bs)(ctx, ds, n, names[1:])
+		}
+
+		return nd.ResolveLink(names)
+	}
+}
+
+func (a *ChainAPI) ChainGetNode(ctx context.Context, p string) (interface{}, error) {
+	ip, err := path.ParsePath(p)
+	if err != nil {
+		return nil, xerrors.Errorf("parsing path: %w", err)
+	}
+
+	bs := a.Chain.Blockstore()
+	bsvc := blockservice.New(bs, offline.Exchange(bs))
+
+	dag := merkledag.NewDAGService(bsvc)
+
+	r := &resolver.Resolver{
+		DAG:         dag,
+		ResolveOnce: resolveOnce(bs),
+	}
+
+	node, err := r.ResolvePath(ctx, ip)
+	if err != nil {
+		return nil, err
+	}
+
+	return node, nil
+}