From feae15740a2a531edd57b39fafc806dc12148682 Mon Sep 17 00:00:00 2001
From: Craig Everett <zxq9@zxq9.com>
Date: Wed, 31 Dec 2025 01:06:20 +0900
Subject: [PATCH] WIP

---
 src/hz.erl       | 13 +++++++++++++
 src/hz_grids.erl | 38 ++++++++++++++++++++++++++++++++++++--
 2 files changed, 49 insertions(+), 2 deletions(-)

diff --git a/src/hz.erl b/src/hz.erl
index 2d909e1..53c5d37 100644
--- a/src/hz.erl
+++ b/src/hz.erl
@@ -2461,6 +2461,19 @@ spend3(DSenderID,
     hz:post_tx(Encoded).
 
 
+-spec sign(Scheme, Target, SecKey) -> Sig
+    when Scheme :: message | binary | bitcoin,
+         Target :: binary(),
+         SecKey :: binary(),
+         Sig    :: binary().
+
+sign(message, Target, SecKey) -> sign_message(Message, SecKey);
+sign(binary,  Target, SecKey) -> sign_binary(Target, SecKey);
+sign(bitcoin, Target, SecKey) -> sign_bitcoin(Target, SecKey).
+
+sign(bitcoin, Target, SecKey) -> sign_message(Target, SecKey).
+
+
 -spec sign_message(Message, SecKey) -> Sig
     when Message :: binary(),
          SecKey  :: binary(),
diff --git a/src/hz_grids.erl b/src/hz_grids.erl
index 78da96b..48ad922 100644
--- a/src/hz_grids.erl
+++ b/src/hz_grids.erl
@@ -190,16 +190,48 @@ l_to_i(S) ->
     end.
 
 
+-spec req(Type, Message) -> RequestMap
+    when Type       :: {sign, message | binary | bitcoin}
+                     | tx
+                     | ack
+                     | sign,
+         Message    :: binary(),
+         RequestMap :: map().
+%% @doc
+%% GRIDS maps always contain the following keys:
+%% ```
+%%  #{"grids"      => 1,
+%%    "chain"      => "gajumaru",
+%%    "network_id" => "groot.mainnet.gajumaru.io",
+%%    "type"       => "message" | "binary" | "binary" | "tx" | "ack"
+%%    "public_id"  => term(),
+%%    "payload"    => string()};
+%% '''
+
 req(Type, Message) ->
     req(Type, Message, false).
 
-req(sign, Message, ID) ->
+req({sign, message}, Message, ID) ->
     #{"grids"      => 1,
       "chain"      => "gajumaru",
       "network_id" => hz:network_id(),
       "type"       => "message",
       "public_id"  => ID,
       "payload"    => Message};
+req({sign, binary}, Binary, ID) ->
+    #{"grids"      => 1,
+      "chain"      => "gajumaru",
+      "network_id" => hz:network_id(),
+      "type"       => "binary",
+      "public_id"  => ID,
+      "payload"    => base64:encode(Binary)};
+req({sign, bitcoin}, Binary, ID) ->
+    #{"grids"      => 1,
+      "chain"      => "gajumaru",
+      "network_id" => hz:network_id(),
+      "type"       => "bitcoin",
+      "public_id"  => ID,
+      "payload"    => base64:encode(Binary)};
 req(tx, Data, ID) ->
     #{"grids"      => 1,
       "chain"      => "gajumaru",
@@ -213,4 +245,6 @@ req(ack, Message, ID) ->
       "network_id" => hz:network_id(),
       "type"       => "ack",
       "public_id"  => ID,
-      "payload"    => Message}.
+      "payload"    => Message};
+req(sign, Message, ID) ->
+    req({sign, message}, Message, ID).