Ledger integration (#931)

Merges the keybase and Ledger code from go-crypto (which is no more) into the SDK
Adds support for Ledger into gaiacli
Cherry-picks updated error handling from #1158

examples/democoin/app/app.go

@@ -3,7 +3,7 @@ package app
 import (
 	"encoding/json"
 
-	abci "github.com/tendermint/abci/types"
+	abci "github.com/tendermint/tendermint/abci/types"
 	tmtypes "github.com/tendermint/tendermint/types"
 	cmn "github.com/tendermint/tmlibs/common"
 	dbm "github.com/tendermint/tmlibs/db"

examples/democoin/app/app_test.go

@@ -1,7 +1,6 @@
 package app
 
 import (
-	"encoding/json"
 	"os"
 	"testing"
 
@@ -9,15 +8,41 @@ import (
 	"github.com/stretchr/testify/require"
 
 	"github.com/cosmos/cosmos-sdk/examples/democoin/types"
+	"github.com/cosmos/cosmos-sdk/examples/democoin/x/cool"
 	sdk "github.com/cosmos/cosmos-sdk/types"
+	"github.com/cosmos/cosmos-sdk/wire"
 	"github.com/cosmos/cosmos-sdk/x/auth"
 
-	abci "github.com/tendermint/abci/types"
-	crypto "github.com/tendermint/go-crypto"
+	abci "github.com/tendermint/tendermint/abci/types"
+	"github.com/tendermint/tendermint/crypto"
 	dbm "github.com/tendermint/tmlibs/db"
 	"github.com/tendermint/tmlibs/log"
 )
 
+func setGenesis(bapp *DemocoinApp, trend string, accs ...auth.BaseAccount) error {
+	genaccs := make([]*types.GenesisAccount, len(accs))
+	for i, acc := range accs {
+		genaccs[i] = types.NewGenesisAccount(&types.AppAccount{acc, "foobart"})
+	}
+
+	genesisState := types.GenesisState{
+		Accounts:    genaccs,
+		CoolGenesis: cool.Genesis{trend},
+	}
+
+	stateBytes, err := wire.MarshalJSONIndent(bapp.cdc, genesisState)
+	if err != nil {
+		return err
+	}
+
+	// Initialize the chain
+	vals := []abci.Validator{}
+	bapp.InitChain(abci.RequestInitChain{Validators: vals, AppStateBytes: stateBytes})
+	bapp.Commit()
+
+	return nil
+}
+
 func TestGenesis(t *testing.T) {
 	logger := log.NewTMLogger(log.NewSyncWriter(os.Stdout)).With("module", "sdk/app")
 	db := dbm.NewMemDB()
@@ -34,21 +59,8 @@ func TestGenesis(t *testing.T) {
 	}
 	acc := &types.AppAccount{baseAcc, "foobart"}
 
-	genesisState := map[string]interface{}{
-		"accounts": []*types.GenesisAccount{
-			types.NewGenesisAccount(acc),
-		},
-		"cool": map[string]string{
-			"trend": "ice-cold",
-		},
-	}
-	stateBytes, err := json.MarshalIndent(genesisState, "", "\t")
+	err = setGenesis(bapp, "ice-cold", baseAcc)
 	require.Nil(t, err)
-
-	vals := []abci.Validator{}
-	bapp.InitChain(abci.RequestInitChain{Validators: vals, AppStateBytes: stateBytes})
-	bapp.Commit()
-
 	// A checkTx context
 	ctx := bapp.BaseApp.NewContext(true, abci.Header{})
 	res1 := bapp.accountMapper.GetAccount(ctx, baseAcc.Address)