Add EIP 712 signing v0

src_features/signMessageEIP712/ui_flow_signMessage712.c

@@ -0,0 +1,63 @@
+#include "shared_context.h"
+#include "ui_callbacks.h"
+
+void prepare_domain_hash_v0() {
+   snprintf(strings.tmp.tmp, 70, "0x%.*H", 32, tmpCtx.messageSigningContext712.domainHash);  
+}
+
+void prepare_message_hash_v0() {
+   snprintf(strings.tmp.tmp, 70, "0x%.*H", 32, tmpCtx.messageSigningContext712.messageHash);  
+}
+
+UX_FLOW_DEF_NOCB(
+    ux_sign_712_v0_flow_1_step,
+    pnn,
+    {
+      &C_icon_certificate,
+      "Sign",
+      "typed message",
+    });
+UX_STEP_NOCB_INIT(
+    ux_sign_712_v0_flow_2_step,
+    bnnn_paging,
+    prepare_domain_hash_v0(),
+    {
+      .title = "Domain hash",
+      .text = strings.tmp.tmp,
+    });
+UX_STEP_NOCB_INIT(
+    ux_sign_712_v0_flow_3_step,
+    bnnn_paging,
+    prepare_message_hash_v0(),
+    {
+      .title = "Message hash",
+      .text = strings.tmp.tmp,
+    });
+UX_FLOW_DEF_VALID(
+    ux_sign_712_v0_flow_4_step,
+    pbb,
+    io_seproxyhal_touch_signMessage712_v0_ok(NULL),
+    {
+      &C_icon_validate_14,
+      "Sign",
+      "message",
+    });
+UX_FLOW_DEF_VALID(
+    ux_sign_712_v0_flow_5_step,
+    pbb,
+    io_seproxyhal_touch_signMessage712_v0_cancel(NULL),
+    {
+      &C_icon_crossmark,
+      "Cancel",
+      "signature",
+    });
+
+const ux_flow_step_t *        const ux_sign_712_v0_flow [] = {
+  &ux_sign_712_v0_flow_1_step,
+  &ux_sign_712_v0_flow_2_step,
+  &ux_sign_712_v0_flow_3_step,
+  &ux_sign_712_v0_flow_4_step,
+  &ux_sign_712_v0_flow_5_step,
+  FLOW_END_STEP,
+};
+