#18 WIP on binary graph serialization

xrb/graph.go

@@ -6,6 +6,7 @@ import (
 	sdk "github.com/cosmos/cosmos-sdk/types"
 	"github.com/regen-network/regen-ledger/types"
 	"github.com/regen-network/regen-ledger/x/schema"
+	"golang.org/x/crypto/blake2b"
 	"net/url"
 	"strconv"
 )
@@ -22,6 +23,7 @@ type Graph interface {
 	Nodes() []types.HasURI
 	RootNode() Node
 	GetNode(id types.HasURI) Node
+	Hash() []byte
 	fmt.Stringer
 }
 
@@ -81,6 +83,15 @@ func (g graph) String() string {
 	return w.String()
 }
 
+func (g graph) Hash() []byte {
+	h, err := blake2b.New256(nil)
+	if err != nil {
+		panic(err)
+	}
+	h.Write([]byte(g.String()))
+	return h.Sum(nil)
+}
+
 type node struct {
 	id types.HasURI
 	// TODO classes    []string

xrb/xrb_test.go

@@ -11,6 +11,7 @@ import (
 	"github.com/leanovate/gopter/gen"
 	"github.com/leanovate/gopter/prop"
 	"github.com/regen-network/regen-ledger/types"
+	"github.com/regen-network/regen-ledger/util"
 	"github.com/regen-network/regen-ledger/x/schema"
 	"github.com/stretchr/testify/suite"
 	abci "github.com/tendermint/tendermint/abci/types"
@@ -109,7 +110,10 @@ func (s *TestSuite) TestGenGraph() {
 	gs, ok := gen.SliceOfN(3, s.GenGraph()).Sample()
 	if ok {
 		for _, g := range gs.([]*graph) {
-			s.T().Log(g.String())
+			s.T().Logf("Graph %s:\n %s",
+				util.MustEncodeBech32(types.Bech32DataAddressPrefix, g.Hash()),
+				g.String(),
+			)
 		}
 	}
 }