diff --git a/packages/cosmic-swingset/app/app.go b/packages/cosmic-swingset/app/app.go
index 91d2131ecbb..f37c3443b14 100644
--- a/packages/cosmic-swingset/app/app.go
+++ b/packages/cosmic-swingset/app/app.go
@@ -329,7 +329,7 @@ func NewAgoricApp(
 		distr.NewAppModule(appCodec, app.distrKeeper, app.accountKeeper, app.bankKeeper, app.stakingKeeper),
 		staking.NewAppModule(appCodec, app.stakingKeeper, app.accountKeeper, app.bankKeeper),
 		upgrade.NewAppModule(app.upgradeKeeper),
-		evidence.NewAppModule(app.evidenceKeeper),
+		evidence.NewAppModule(appCodec, app.evidenceKeeper),
 		ibc.NewAppModule(app.ibcKeeper),
 		params.NewAppModule(app.paramsKeeper),
 		transferModule,
diff --git a/packages/cosmic-swingset/bin/ag-nchainz b/packages/cosmic-swingset/bin/ag-nchainz
index d12ae274b5b..aaff2d3dfd9 100755
--- a/packages/cosmic-swingset/bin/ag-nchainz
+++ b/packages/cosmic-swingset/bin/ag-nchainz
@@ -11,6 +11,8 @@
 set -e
 progname=$(basename -- "$0")
 
+trap 'kill $(jobs -p) 2>/dev/null' EXIT 
+
 BASE_PORT=8000
 NUM_SOLOS=1
 
@@ -59,9 +61,10 @@ testnet)
       ag-solo 1000uag
 	done
 	# $thisdir/../../deployment/set-json.js $n0d/config/genesis.json --agoric-genesis-overrides
-  for node in `ls -d $chainid/n[1-9]* 2>/dev/null`; do
+  for node in `ls -d $chainid/n[1-9]* 2>/dev/null || :`; do
     cp $n0d/config/genesis.json $node/$DAEMON/config/genesis.json
   done
+  exit 0
   ;;
 start-daemon)
   BASEDIR=$1
@@ -73,6 +76,7 @@ start-daemon)
   done
   echo "Starting BOOT_ADDRESS=$ba $DAEMON ${1+"$@"}"
   DEBUG=agoric ROLE=two_chain BOOT_ADDRESS=$ba $DAEMON ${1+"$@"}
+  exit 0
   ;;
 
 start-solos)
@@ -100,8 +104,9 @@ start-solos)
     ) >>nchainz/logs/$log 2>&1 &
   done
   sleep 2
-  echo "Waiting for all solos (Hit Control-C to exit)..."
+  echo "Waiting for all ${1+"$@ "}solos (Hit Control-C to exit)..."
   wait
+  exit 0
   ;;
 *)
   echo 1>&2 "$progname: unrecognized command \`$COMMAND'"
diff --git a/packages/cosmic-swingset/go.mod b/packages/cosmic-swingset/go.mod
index 0732b6236c2..2c3e5a91f26 100644
--- a/packages/cosmic-swingset/go.mod
+++ b/packages/cosmic-swingset/go.mod
@@ -6,8 +6,8 @@ require (
 	github.com/99designs/keyring v1.1.4 // indirect
 	github.com/Agoric/agoric-sdk v0.0.0-00010101000000-000000000000 // indirect
 	github.com/bartekn/go-bip39 v0.0.0-20171116152956-a05967ea095d // indirect
-  github.com/cosmos/cosmos-sdk v0.34.4-0.20200422222342-f6e9ee762358
-  github.com/gibson042/canonicaljson-go v1.0.3 // indirect
+	github.com/cosmos/cosmos-sdk v0.34.4-0.20200423194215-1cd1d088df05
+	github.com/gibson042/canonicaljson-go v1.0.3 // indirect
 	github.com/golang/mock v1.4.3 // indirect
 	github.com/gorilla/handlers v1.4.2 // indirect
 	github.com/gorilla/mux v1.7.4
diff --git a/packages/cosmic-swingset/go.sum b/packages/cosmic-swingset/go.sum
index f323156761c..6350c203679 100644
--- a/packages/cosmic-swingset/go.sum
+++ b/packages/cosmic-swingset/go.sum
@@ -87,6 +87,8 @@ github.com/cosmos/cosmos-sdk v0.34.4-0.20200417201027-11528d39594c h1:Yd7DVqfImC
 github.com/cosmos/cosmos-sdk v0.34.4-0.20200417201027-11528d39594c/go.mod h1:jngw1LJfwEAU+xc/tZwUGIXBAJHapckYGtXycsq8D+U=
 github.com/cosmos/cosmos-sdk v0.34.4-0.20200422222342-f6e9ee762358 h1:ZsII2yECeLh2jWqFz3bK8JInzzlHPhgB0ob2c9XMyz4=
 github.com/cosmos/cosmos-sdk v0.34.4-0.20200422222342-f6e9ee762358/go.mod h1:Kcgs8c2WWtO2Q+KmDogvGRw+sdEqpvHYXFhj/QiAoOg=
+github.com/cosmos/cosmos-sdk v0.34.4-0.20200423194215-1cd1d088df05 h1:jaV9iTBaiYmNAMaDEhvWukIQWQ/NfBoHbgSqPgdKFmM=
+github.com/cosmos/cosmos-sdk v0.34.4-0.20200423194215-1cd1d088df05/go.mod h1:Kcgs8c2WWtO2Q+KmDogvGRw+sdEqpvHYXFhj/QiAoOg=
 github.com/cosmos/cosmos-sdk v0.38.3 h1:qIBTiw+2T9POaSUJ5rvbBbXeq8C8btBlJxnSegPBd3Y=
 github.com/cosmos/cosmos-sdk v0.38.3/go.mod h1:rzWOofbKfRt3wxiylmYWEFHnxxGj0coyqgWl2I9obAw=
 github.com/cosmos/go-bip39 v0.0.0-20180819234021-555e2067c45d h1:49RLWk1j44Xu4fjHb6JFYmeUnDORVwHNkDxaQ0ctCVU=
diff --git a/packages/cosmic-swingset/x/swingset/ibc.go b/packages/cosmic-swingset/x/swingset/ibc.go
index 01580fb4a06..cb43f2cc4a5 100644
--- a/packages/cosmic-swingset/x/swingset/ibc.go
+++ b/packages/cosmic-swingset/x/swingset/ibc.go
@@ -102,7 +102,7 @@ func (ch channelHandler) Receive(ctx *ControllerContext, str string) (ret string
 		}
 
 	case "bindPort":
-		err = ctx.Keeper.BindPort(ctx.Context, msg.PortID, ch.ibcModule)
+		err = ctx.Keeper.BindPort(ctx.Context, msg.PortID)
 		if err == nil {
 			ret = "true"
 		}
diff --git a/packages/cosmic-swingset/x/swingset/internal/keeper/keeper.go b/packages/cosmic-swingset/x/swingset/internal/keeper/keeper.go
index cd25d87c2d1..63d0e1838fb 100644
--- a/packages/cosmic-swingset/x/swingset/internal/keeper/keeper.go
+++ b/packages/cosmic-swingset/x/swingset/internal/keeper/keeper.go
@@ -212,8 +212,7 @@ func (k Keeper) ChanCloseInit(ctx sdk.Context, portID, channelID string) error {
 
 // BindPort defines a wrapper function for the port Keeper's function in
 // order to expose it to the SwingSet IBC handler.
-// It also registers a route to the port.
-func (k Keeper) BindPort(ctx sdk.Context, portID string, mod porttypes.IBCModule) error {
+func (k Keeper) BindPort(ctx sdk.Context, portID string) error {
 	cap := k.portKeeper.BindPort(ctx, portID)
 	return k.ClaimCapability(ctx, cap, porttypes.PortPath(portID))
 }