vendor: Update github.com/hashicorp/go-memdb

go.mod

@@ -39,8 +39,7 @@ require (
 	github.com/hashicorp/go-connlimit v0.3.0
 	github.com/hashicorp/go-discover v0.0.0-20200501174627-ad1e96bde088
 	github.com/hashicorp/go-hclog v0.12.0
-	github.com/hashicorp/go-immutable-radix v1.2.0 // indirect
-	github.com/hashicorp/go-memdb v1.1.0
+	github.com/hashicorp/go-memdb v1.3.0
 	github.com/hashicorp/go-msgpack v0.5.5
 	github.com/hashicorp/go-multierror v1.1.0
 	github.com/hashicorp/go-raftchunking v0.6.1

go.sum

@@ -235,12 +235,11 @@ github.com/hashicorp/go-hclog v0.9.2/go.mod h1:5CU+agLiy3J7N7QjHK5d05KxGsuXiQLrj
 github.com/hashicorp/go-hclog v0.12.0 h1:d4QkX8FRTYaKaCZBoXYY8zJX2BXjWxurN/GA2tkrmZM=
 github.com/hashicorp/go-hclog v0.12.0/go.mod h1:whpDNt7SSdeAju8AWKIWsul05p54N/39EeqMAyrmvFQ=
 github.com/hashicorp/go-immutable-radix v1.0.0/go.mod h1:0y9vanUI8NX6FsYoO3zeMjhV/C5i9g4Q3DwcSNZ4P60=
-github.com/hashicorp/go-immutable-radix v1.1.0/go.mod h1:0y9vanUI8NX6FsYoO3zeMjhV/C5i9g4Q3DwcSNZ4P60=
-github.com/hashicorp/go-immutable-radix v1.2.0 h1:l6UW37iCXwZkZoAbEYnptSHVE/cQ5bOTPYG5W3vf9+8=
-github.com/hashicorp/go-immutable-radix v1.2.0/go.mod h1:0y9vanUI8NX6FsYoO3zeMjhV/C5i9g4Q3DwcSNZ4P60=
+github.com/hashicorp/go-immutable-radix v1.3.0 h1:8exGP7ego3OmkfksihtSouGMZ+hQrhxx+FVELeXpVPE=
+github.com/hashicorp/go-immutable-radix v1.3.0/go.mod h1:0y9vanUI8NX6FsYoO3zeMjhV/C5i9g4Q3DwcSNZ4P60=
 github.com/hashicorp/go-kms-wrapping/entropy v0.1.0/go.mod h1:d1g9WGtAunDNpek8jUIEJnBlbgKS1N2Q61QkHiZyR1g=
-github.com/hashicorp/go-memdb v1.1.0 h1:ClvpUXpBA6UDs5+vc1h3wqe4UJU+rwum7CU219SeCbk=
-github.com/hashicorp/go-memdb v1.1.0/go.mod h1:LWQ8R70vPrS4OEY9k28D2z8/Zzyu34NVzeRibGAzHO0=
+github.com/hashicorp/go-memdb v1.3.0 h1:xdXq34gBOMEloa9rlGStLxmfX/dyIK8htOv36dQUwHU=
+github.com/hashicorp/go-memdb v1.3.0/go.mod h1:Mluclgwib3R93Hk5fxEfiRhB+6Dar64wWh71LpNSe3g=
 github.com/hashicorp/go-msgpack v0.5.3/go.mod h1:ahLV/dePpqEmjfWmKiqvPkv/twdG7iPBM1vqhUKIvfM=
 github.com/hashicorp/go-msgpack v0.5.5 h1:i9R9JSrqIz0QVLz3sz+i3YJdT7TTSLcfLLzJi9aZTuI=
 github.com/hashicorp/go-msgpack v0.5.5/go.mod h1:ahLV/dePpqEmjfWmKiqvPkv/twdG7iPBM1vqhUKIvfM=

vendor/github.com/hashicorp/go-immutable-radix/CHANGELOG.md

@@ -1,4 +1,16 @@
-# UNRELEASED
+# 1.3.0 (September 17th, 2020)
+
+FEATURES
+
+* Add reverse tree traversal [[GH-30](https://github.com/hashicorp/go-immutable-radix/pull/30)]
+
+# 1.2.0 (March 18th, 2020)
+
+FEATURES
+
+* Adds a `Clone` method to `Txn` allowing transactions to be split either into two independently mutable trees. [[GH-26](https://github.com/hashicorp/go-immutable-radix/pull/26)]
+
+# 1.1.0 (May 22nd, 2019)
 
 FEATURES
 

vendor/github.com/hashicorp/go-immutable-radix/iter.go

@@ -155,7 +155,7 @@ func (i *Iterator) Next() ([]byte, interface{}, bool) {
 	// Initialize our stack if needed
 	if i.stack == nil && i.node != nil {
 		i.stack = []edges{
-			edges{
+			{
 				edge{node: i.node},
 			},
 		}

vendor/github.com/hashicorp/go-immutable-radix/node.go

@@ -211,6 +211,12 @@ func (n *Node) Iterator() *Iterator {
 	return &Iterator{node: n}
 }
 
+// ReverseIterator is used to return an iterator at
+// the given node to walk the tree backwards
+func (n *Node) ReverseIterator() *ReverseIterator {
+	return NewReverseIterator(n)
+}
+
 // rawIterator is used to return a raw iterator at the given node to walk the
 // tree.
 func (n *Node) rawIterator() *rawIterator {
@@ -224,6 +230,11 @@ func (n *Node) Walk(fn WalkFn) {
 	recursiveWalk(n, fn)
 }
 
+// WalkBackwards is used to walk the tree in reverse order
+func (n *Node) WalkBackwards(fn WalkFn) {
+	reverseRecursiveWalk(n, fn)
+}
+
 // WalkPrefix is used to walk the tree under a prefix
 func (n *Node) WalkPrefix(prefix []byte, fn WalkFn) {
 	search := prefix
@@ -302,3 +313,22 @@ func recursiveWalk(n *Node, fn WalkFn) bool {
 	}
 	return false
 }
+
+// reverseRecursiveWalk is used to do a reverse pre-order
+// walk of a node recursively. Returns true if the walk
+// should be aborted
+func reverseRecursiveWalk(n *Node, fn WalkFn) bool {
+	// Visit the leaf values if any
+	if n.leaf != nil && fn(n.leaf.key, n.leaf.val) {
+		return true
+	}
+
+	// Recurse on the children in reverse order
+	for i := len(n.edges) - 1; i >= 0; i-- {
+		e := n.edges[i]
+		if reverseRecursiveWalk(e.node, fn) {
+			return true
+		}
+	}
+	return false
+}

vendor/github.com/hashicorp/go-immutable-radix/raw_iter.go

@@ -41,7 +41,7 @@ func (i *rawIterator) Next() {
 	// Initialize our stack if needed.
 	if i.stack == nil && i.node != nil {
 		i.stack = []rawStackEntry{
-			rawStackEntry{
+			{
 				edges: edges{
 					edge{node: i.node},
 				},

vendor/github.com/hashicorp/go-immutable-radix/reverse_iter.go

@@ -0,0 +1,177 @@
+package iradix
+
+import (
+	"bytes"
+)
+
+// ReverseIterator is used to iterate over a set of nodes
+// in reverse in-order
+type ReverseIterator struct {
+	i *Iterator
+}
+
+// NewReverseIterator returns a new ReverseIterator at a node
+func NewReverseIterator(n *Node) *ReverseIterator {
+	return &ReverseIterator{
+		i: &Iterator{node: n},
+	}
+}
+
+// SeekPrefixWatch is used to seek the iterator to a given prefix
+// and returns the watch channel of the finest granularity
+func (ri *ReverseIterator) SeekPrefixWatch(prefix []byte) (watch <-chan struct{}) {
+	return ri.i.SeekPrefixWatch(prefix)
+}
+
+// SeekPrefix is used to seek the iterator to a given prefix
+func (ri *ReverseIterator) SeekPrefix(prefix []byte) {
+	ri.i.SeekPrefixWatch(prefix)
+}
+
+func (ri *ReverseIterator) recurseMax(n *Node) *Node {
+	// Traverse to the maximum child
+	if n.leaf != nil {
+		return n
+	}
+	if len(n.edges) > 0 {
+		// Add all the other edges to the stack (the max node will be added as
+		// we recurse)
+		m := len(n.edges)
+		ri.i.stack = append(ri.i.stack, n.edges[:m-1])
+		return ri.recurseMax(n.edges[m-1].node)
+	}
+	// Shouldn't be possible
+	return nil
+}
+
+// SeekReverseLowerBound is used to seek the iterator to the largest key that is
+// lower or equal to the given key. There is no watch variant as it's hard to
+// predict based on the radix structure which node(s) changes might affect the
+// result.
+func (ri *ReverseIterator) SeekReverseLowerBound(key []byte) {
+	// Wipe the stack. Unlike Prefix iteration, we need to build the stack as we
+	// go because we need only a subset of edges of many nodes in the path to the
+	// leaf with the lower bound.
+	ri.i.stack = []edges{}
+	n := ri.i.node
+	search := key
+
+	found := func(n *Node) {
+		ri.i.node = n
+		ri.i.stack = append(ri.i.stack, edges{edge{node: n}})
+	}
+
+	for {
+		// Compare current prefix with the search key's same-length prefix.
+		var prefixCmp int
+		if len(n.prefix) < len(search) {
+			prefixCmp = bytes.Compare(n.prefix, search[0:len(n.prefix)])
+		} else {
+			prefixCmp = bytes.Compare(n.prefix, search)
+		}
+
+		if prefixCmp < 0 {
+			// Prefix is smaller than search prefix, that means there is no lower bound.
+			// But we are looking in reverse, so the reverse lower bound will be the
+			// largest leaf under this subtree, since it is the value that would come
+			// right before the current search prefix if it were in the tree. So we need
+			// to follow the maximum path in this subtree to find it.
+			n = ri.recurseMax(n)
+			if n != nil {
+				found(n)
+			}
+			return
+		}
+
+		if prefixCmp > 0 {
+			// Prefix is larger than search prefix, that means there is no reverse lower
+			// bound since nothing comes before our current search prefix.
+			ri.i.node = nil
+			return
+		}
+
+		// Prefix is equal, we are still heading for an exact match. If this is a
+		// leaf we're done.
+		if n.leaf != nil {
+			if bytes.Compare(n.leaf.key, key) < 0 {
+				ri.i.node = nil
+				return
+			}
+			found(n)
+			return
+		}
+
+		// Consume the search prefix
+		if len(n.prefix) > len(search) {
+			search = []byte{}
+		} else {
+			search = search[len(n.prefix):]
+		}
+
+		// Otherwise, take the lower bound next edge.
+		idx, lbNode := n.getLowerBoundEdge(search[0])
+
+		// From here, we need to update the stack with all values lower than
+		// the lower bound edge. Since getLowerBoundEdge() returns -1 when the
+		// search prefix is larger than all edges, we need to place idx at the
+		// last edge index so they can all be place in the stack, since they
+		// come before our search prefix.
+		if idx == -1 {
+			idx = len(n.edges)
+		}
+
+		// Create stack edges for the all strictly lower edges in this node.
+		if len(n.edges[:idx]) > 0 {
+			ri.i.stack = append(ri.i.stack, n.edges[:idx])
+		}
+
+		// Exit if there's not lower bound edge. The stack will have the
+		// previous nodes already.
+		if lbNode == nil {
+			ri.i.node = nil
+			return
+		}
+
+		ri.i.node = lbNode
+		// Recurse
+		n = lbNode
+	}
+}
+
+// Previous returns the previous node in reverse order
+func (ri *ReverseIterator) Previous() ([]byte, interface{}, bool) {
+	// Initialize our stack if needed
+	if ri.i.stack == nil && ri.i.node != nil {
+		ri.i.stack = []edges{
+			{
+				edge{node: ri.i.node},
+			},
+		}
+	}
+
+	for len(ri.i.stack) > 0 {
+		// Inspect the last element of the stack
+		n := len(ri.i.stack)
+		last := ri.i.stack[n-1]
+		m := len(last)
+		elem := last[m-1].node
+
+		// Update the stack
+		if m > 1 {
+			ri.i.stack[n-1] = last[:m-1]
+		} else {
+			ri.i.stack = ri.i.stack[:n-1]
+		}
+
+		// Push the edges onto the frontier
+		if len(elem.edges) > 0 {
+			ri.i.stack = append(ri.i.stack, elem.edges)
+		}
+
+		// Return the leaf values if any
+		if elem.leaf != nil {
+			return elem.leaf.key, elem.leaf.val, true
+		}
+	}
+	return nil, nil, false
+}

vendor/github.com/hashicorp/go-memdb/README.md

@@ -32,7 +32,7 @@ For the underlying immutable radix trees, see [go-immutable-radix](https://githu
 Documentation
 =============
 
-The full documentation is available on [Godoc](http://godoc.org/github.com/hashicorp/go-memdb).
+The full documentation is available on [Godoc](https://pkg.go.dev/github.com/hashicorp/go-memdb).
 
 Example
 =======

vendor/github.com/hashicorp/go-memdb/go.mod

@@ -2,4 +2,7 @@ module github.com/hashicorp/go-memdb
 
 go 1.12
 
-require github.com/hashicorp/go-immutable-radix v1.1.0
+require (
+	github.com/hashicorp/go-immutable-radix v1.3.0
+	github.com/hashicorp/golang-lru v0.5.4 // indirect
+)

vendor/github.com/hashicorp/go-memdb/go.sum

@@ -1,6 +1,8 @@
-github.com/hashicorp/go-immutable-radix v1.1.0 h1:vN9wG1D6KG6YHRTWr8512cxGOVgTMEfgEdSj/hr8MPc=
-github.com/hashicorp/go-immutable-radix v1.1.0/go.mod h1:0y9vanUI8NX6FsYoO3zeMjhV/C5i9g4Q3DwcSNZ4P60=
+github.com/hashicorp/go-immutable-radix v1.3.0 h1:8exGP7ego3OmkfksihtSouGMZ+hQrhxx+FVELeXpVPE=
+github.com/hashicorp/go-immutable-radix v1.3.0/go.mod h1:0y9vanUI8NX6FsYoO3zeMjhV/C5i9g4Q3DwcSNZ4P60=
 github.com/hashicorp/go-uuid v1.0.0 h1:RS8zrF7PhGwyNPOtxSClXXj9HA8feRnJzgnI1RJCSnM=
 github.com/hashicorp/go-uuid v1.0.0/go.mod h1:6SBZvOh/SIDV7/2o3Jml5SYk/TvGqwFJ/bN7x4byOro=
 github.com/hashicorp/golang-lru v0.5.0 h1:CL2msUPvZTLb5O648aiLNJw3hnBxN2+1Jq8rCOH9wdo=
 github.com/hashicorp/golang-lru v0.5.0/go.mod h1:/m3WP610KZHVQ1SGc6re/UDhFvYD7pJ4Ao+sR/qLZy8=
+github.com/hashicorp/golang-lru v0.5.4 h1:YDjusn29QI/Das2iO9M0BHnIbxPeyuCHsjMW+lJfyTc=
+github.com/hashicorp/golang-lru v0.5.4/go.mod h1:iADmTwqILo4mZ8BN3D2Q6+9jd8WM5uGBxy+E8yxSoD4=

vendor/github.com/hashicorp/go-memdb/index.go

@@ -428,6 +428,41 @@ func IsUintType(k reflect.Kind) (size int, okay bool) {
 	}
 }
 
+// BoolFieldIndex is used to extract an boolean field from an object using
+// reflection and builds an index on that field.
+type BoolFieldIndex struct {
+	Field string
+}
+
+func (i *BoolFieldIndex) FromObject(obj interface{}) (bool, []byte, error) {
+	v := reflect.ValueOf(obj)
+	v = reflect.Indirect(v) // Dereference the pointer if any
+
+	fv := v.FieldByName(i.Field)
+	if !fv.IsValid() {
+		return false, nil,
+			fmt.Errorf("field '%s' for %#v is invalid", i.Field, obj)
+	}
+
+	// Check the type
+	k := fv.Kind()
+	if k != reflect.Bool {
+		return false, nil, fmt.Errorf("field %q is of type %v; want a bool", i.Field, k)
+	}
+
+	// Get the value and encode it
+	buf := make([]byte, 1)
+	if fv.Bool() {
+		buf[0] = 1
+	}
+
+	return true, buf, nil
+}
+
+func (i *BoolFieldIndex) FromArgs(args ...interface{}) ([]byte, error) {
+	return fromBoolArgs(args)
+}
+
 // UUIDFieldIndex is used to extract a field from an object
 // using reflection and builds an index on that field by treating
 // it as a UUID. This is an optimization to using a StringFieldIndex

vendor/github.com/hashicorp/go-memdb/txn.go

@@ -536,6 +536,34 @@ func (txn *Txn) FirstWatch(table, index string, args ...interface{}) (<-chan str
 	return watch, value, nil
 }
 
+// LastWatch is used to return the last matching object for
+// the given constraints on the index along with the watch channel
+func (txn *Txn) LastWatch(table, index string, args ...interface{}) (<-chan struct{}, interface{}, error) {
+	// Get the index value
+	indexSchema, val, err := txn.getIndexValue(table, index, args...)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	// Get the index itself
+	indexTxn := txn.readableIndex(table, indexSchema.Name)
+
+	// Do an exact lookup
+	if indexSchema.Unique && val != nil && indexSchema.Name == index {
+		watch, obj, ok := indexTxn.GetWatch(val)
+		if !ok {
+			return watch, nil, nil
+		}
+		return watch, obj, nil
+	}
+
+	// Handle non-unique index by using an iterator and getting the last value
+	iter := indexTxn.Root().ReverseIterator()
+	watch := iter.SeekPrefixWatch(val)
+	_, value, _ := iter.Previous()
+	return watch, value, nil
+}
+
 // First is used to return the first matching object for
 // the given constraints on the index
 func (txn *Txn) First(table, index string, args ...interface{}) (interface{}, error) {
@@ -543,6 +571,13 @@ func (txn *Txn) First(table, index string, args ...interface{}) (interface{}, er
 	return val, err
 }
 
+// Last is used to return the last matching object for
+// the given constraints on the index
+func (txn *Txn) Last(table, index string, args ...interface{}) (interface{}, error) {
+	_, val, err := txn.LastWatch(table, index, args...)
+	return val, err
+}
+
 // LongestPrefix is used to fetch the longest prefix match for the given
 // constraints on the index. Note that this will not work with the memdb
 // StringFieldIndex because it adds null terminators which prevent the
@@ -654,6 +689,26 @@ func (txn *Txn) Get(table, index string, args ...interface{}) (ResultIterator, e
 	return iter, nil
 }
 
+// GetReverse is used to construct a Reverse ResultIterator over all the
+// rows that match the given constraints of an index.
+// The returned ResultIterator's Next() will return the next Previous value
+func (txn *Txn) GetReverse(table, index string, args ...interface{}) (ResultIterator, error) {
+	indexIter, val, err := txn.getIndexIteratorReverse(table, index, args...)
+	if err != nil {
+		return nil, err
+	}
+
+	// Seek the iterator to the appropriate sub-set
+	watchCh := indexIter.SeekPrefixWatch(val)
+
+	// Create an iterator
+	iter := &radixReverseIterator{
+		iter:    indexIter,
+		watchCh: watchCh,
+	}
+	return iter, nil
+}
+
 // LowerBound is used to construct a ResultIterator over all the the range of
 // rows that have an index value greater than or equal to the provide args.
 // Calling this then iterating until the rows are larger than required allows
@@ -676,6 +731,29 @@ func (txn *Txn) LowerBound(table, index string, args ...interface{}) (ResultIter
 	return iter, nil
 }
 
+// ReverseLowerBound is used to construct a Reverse ResultIterator over all the
+// the range of rows that have an index value less than or equal to the
+// provide args.  Calling this then iterating until the rows are lower than
+// required allows range scans within an index. It is not possible to watch the
+// resulting iterator since the radix tree doesn't efficiently allow watching
+// on lower bound changes. The WatchCh returned will be nill and so will block
+// forever.
+func (txn *Txn) ReverseLowerBound(table, index string, args ...interface{}) (ResultIterator, error) {
+	indexIter, val, err := txn.getIndexIteratorReverse(table, index, args...)
+	if err != nil {
+		return nil, err
+	}
+
+	// Seek the iterator to the appropriate sub-set
+	indexIter.SeekReverseLowerBound(val)
+
+	// Create an iterator
+	iter := &radixReverseIterator{
+		iter: indexIter,
+	}
+	return iter, nil
+}
+
 // objectID is a tuple of table name and the raw internal id byte slice
 // converted to a string. It's only converted to a string to make it comparable
 // so this struct can be used as a map index.
@@ -744,6 +822,15 @@ func (txn *Txn) Changes() Changes {
 			// case it's different. Note that m is not a pointer so we are not
 			// modifying the txn.changeSet here - it's already a copy.
 			m.Before = mi.firstBefore
+
+			// Edge case - if the object was inserted and then eventually deleted in
+			// the same transaction, then the net affect on that key is a no-op. Don't
+			// emit a mutation with nil for before and after as it's meaningless and
+			// might violate expectations and cause a panic in code that assumes at
+			// least one must be set.
+			if m.Before == nil && m.After == nil {
+				continue
+			}
 			cs = append(cs, m)
 		}
 	}
@@ -768,6 +855,22 @@ func (txn *Txn) getIndexIterator(table, index string, args ...interface{}) (*ira
 	return indexIter, val, nil
 }
 
+func (txn *Txn) getIndexIteratorReverse(table, index string, args ...interface{}) (*iradix.ReverseIterator, []byte, error) {
+	// Get the index value to scan
+	indexSchema, val, err := txn.getIndexValue(table, index, args...)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	// Get the index itself
+	indexTxn := txn.readableIndex(table, indexSchema.Name)
+	indexRoot := indexTxn.Root()
+
+	// Get an interator over the index
+	indexIter := indexRoot.ReverseIterator()
+	return indexIter, val, nil
+}
+
 // Defer is used to push a new arbitrary function onto a stack which
 // gets called when a transaction is committed and finished. Deferred
 // functions are called in LIFO order, and only invoked at the end of
@@ -795,3 +898,43 @@ func (r *radixIterator) Next() interface{} {
 	}
 	return value
 }
+
+type radixReverseIterator struct {
+	iter    *iradix.ReverseIterator
+	watchCh <-chan struct{}
+}
+
+func (r *radixReverseIterator) Next() interface{} {
+	_, value, ok := r.iter.Previous()
+	if !ok {
+		return nil
+	}
+	return value
+}
+
+func (r *radixReverseIterator) WatchCh() <-chan struct{} {
+	return r.watchCh
+}
+
+// Snapshot creates a snapshot of the current state of the transaction.
+// Returns a new read-only transaction or nil if the transaction is already
+// aborted or committed.
+func (txn *Txn) Snapshot() *Txn {
+	if txn.rootTxn == nil {
+		return nil
+	}
+
+	snapshot := &Txn{
+		db:      txn.db,
+		rootTxn: txn.rootTxn.Clone(),
+	}
+
+	// Commit sub-transactions into the snapshot
+	for key, subTxn := range txn.modified {
+		path := indexPath(key.Table, key.Index)
+		final := subTxn.CommitOnly()
+		snapshot.rootTxn.Insert(path, final)
+	}
+
+	return snapshot
+}

vendor/github.com/hashicorp/go-memdb/watch.go

@@ -127,3 +127,18 @@ func (w WatchSet) watchMany(ctx context.Context) error {
 		return ctx.Err()
 	}
 }
+
+// WatchCh returns a channel that is used to wait for either the watch set to trigger
+// or for the context to be cancelled. WatchCh creates a new goroutine each call, so
+// callers may need to cache the returned channel to avoid creating extra goroutines.
+func (w WatchSet) WatchCh(ctx context.Context) <-chan error {
+	// Create the outgoing channel
+	triggerCh := make(chan error, 1)
+
+	// Create a goroutine to collect the error from WatchCtx
+	go func() {
+		triggerCh <- w.WatchCtx(ctx)
+	}()
+
+	return triggerCh
+}

vendor/modules.txt

@@ -229,9 +229,9 @@ github.com/hashicorp/go-discover/provider/triton
 github.com/hashicorp/go-discover/provider/vsphere
 # github.com/hashicorp/go-hclog v0.12.0
 github.com/hashicorp/go-hclog
-# github.com/hashicorp/go-immutable-radix v1.2.0
+# github.com/hashicorp/go-immutable-radix v1.3.0
 github.com/hashicorp/go-immutable-radix
-# github.com/hashicorp/go-memdb v1.1.0
+# github.com/hashicorp/go-memdb v1.3.0
 github.com/hashicorp/go-memdb
 # github.com/hashicorp/go-msgpack v0.5.5
 github.com/hashicorp/go-msgpack/codec