Clef: USB hw wallet support (#17756)

* signer: implement USB interaction with hw wallets

* signer: fix failing testcases

signer/rules/rules.go

@@ -194,6 +194,11 @@ func (r *rulesetUI) ApproveImport(request *core.ImportRequest) (core.ImportRespo
 	return r.next.ApproveImport(request)
 }
 
+// OnInputRequired not handled by rules
+func (r *rulesetUI) OnInputRequired(info core.UserInputRequest) (core.UserInputResponse, error) {
+	return r.next.OnInputRequired(info)
+}
+
 func (r *rulesetUI) ApproveListing(request *core.ListRequest) (core.ListResponse, error) {
 	jsonreq, err := json.Marshal(request)
 	approved, err := r.checkApproval("ApproveListing", jsonreq, err)
@@ -222,6 +227,7 @@ func (r *rulesetUI) ShowInfo(message string) {
 	log.Info(message)
 	r.next.ShowInfo(message)
 }
+
 func (r *rulesetUI) OnSignerStartup(info core.StartupInfo) {
 	jsonInfo, err := json.Marshal(info)
 	if err != nil {

signer/rules/rules_test.go

@@ -74,6 +74,10 @@ func mixAddr(a string) (*common.MixedcaseAddress, error) {
 
 type alwaysDenyUI struct{}
 
+func (alwaysDenyUI) OnInputRequired(info core.UserInputRequest) (core.UserInputResponse, error) {
+	return core.UserInputResponse{}, nil
+}
+
 func (alwaysDenyUI) OnSignerStartup(info core.StartupInfo) {
 }
 
@@ -200,6 +204,11 @@ type dummyUI struct {
 	calls []string
 }
 
+func (d *dummyUI) OnInputRequired(info core.UserInputRequest) (core.UserInputResponse, error) {
+	d.calls = append(d.calls, "OnInputRequired")
+	return core.UserInputResponse{}, nil
+}
+
 func (d *dummyUI) ApproveTx(request *core.SignTxRequest) (core.SignTxResponse, error) {
 	d.calls = append(d.calls, "ApproveTx")
 	return core.SignTxResponse{}, core.ErrRequestDenied
@@ -509,6 +518,11 @@ type dontCallMe struct {
 	t *testing.T
 }
 
+func (d *dontCallMe) OnInputRequired(info core.UserInputRequest) (core.UserInputResponse, error) {
+	d.t.Fatalf("Did not expect next-handler to be called")
+	return core.UserInputResponse{}, nil
+}
+
 func (d *dontCallMe) OnSignerStartup(info core.StartupInfo) {
 }