vochain/app.go: SetZkCircuit during beginBlock

vochain/app.go

@@ -17,6 +17,7 @@ import (
 	lru "github.com/hashicorp/golang-lru/v2"
 	"go.vocdoni.io/dvote/crypto/zk/circuit"
 	"go.vocdoni.io/dvote/test/testcommon/testutil"
+	"go.vocdoni.io/dvote/vochain/genesis"
 	"go.vocdoni.io/dvote/vochain/ist"
 	vstate "go.vocdoni.io/dvote/vochain/state"
 	"go.vocdoni.io/dvote/vochain/transaction"
@@ -259,6 +260,7 @@ func (app *BaseApplication) beginBlock(t time.Time, height uint32) {
 	app.State.Rollback()
 	app.startBlockTimestamp.Store(t.Unix())
 	app.State.SetHeight(height)
+	app.SetZkCircuit()
 	go app.State.CachePurge(height)
 	app.State.OnBeginBlock(vstate.BeginBlock{
 		Height: int64(height),
@@ -351,6 +353,15 @@ func (app *BaseApplication) Genesis() *tmtypes.GenesisDoc {
 	return app.genesisInfo
 }
 
+// SetZkCircuit updates the ZkCircuit if planned at the current height
+func (app *BaseApplication) SetZkCircuit() {
+	if genesis, found := genesis.Genesis[app.ChainID()]; found {
+		if tag, found := genesis.Circuits[app.Height()]; found {
+			app.SetCircuitConfigTag(tag)
+		}
+	}
+}
+
 // SetCircuitConfigTag sets the current BaseApplication circuit config tag
 // attribute to the provided one and loads the circuit configuration based on
 // it. The available circuit config tags are defined in