Cleanup multisig lua

programs/native/solua/multisig.lua

@@ -4,8 +4,6 @@
 -- are subtracted from account 1 and given to account 4. Note that unlike
 -- Rust, Lua is one-based and that account 1 is the first account.
 
-local serialize = load(accounts[2].userdata)().serialize
-
 function find(t, x)
     for i, v in pairs(t) do
         if v == x then
@@ -14,14 +12,25 @@ function find(t, x)
     end
 end
 
-if #accounts[3].userdata == 0 then
-    local cfg = load("return" .. data)()
-    accounts[3].userdata = serialize(cfg, nil, "s")
+function deserialize(bytes)
+    return load("return" .. bytes)()
+end
+
+local from_account,
+      serialize_account,
+      state_account,
+      to_account = table.unpack(accounts)
+
+local serialize = load(serialize_account.userdata)().serialize
+
+if #state_account.userdata == 0 then
+    local cfg = deserialize(data)
+    state_account.userdata = serialize(cfg, nil, "s")
     return
 end
 
-local cfg = load("return" .. accounts[3].userdata)()
-local key = load("return" .. data)()
+local cfg = deserialize(state_account.userdata)
+local key = deserialize(data)
 
 local i = find(cfg.n, key)
 if i == nil then
@@ -30,13 +39,12 @@ end
 
 table.remove(cfg.n, i)
 cfg.m = cfg.m - 1
-accounts[3].userdata = serialize(cfg, nil, "s")
+state_account.userdata = serialize(cfg, nil, "s")
 
 if cfg.m == 0 then
-    accounts[1].tokens = accounts[1].tokens - cfg.tokens
-    accounts[4].tokens = accounts[4].tokens + cfg.tokens
+    from_account.tokens = from_account.tokens - cfg.tokens
+    to_account.tokens = to_account.tokens + cfg.tokens
 
     -- End of game.
-    accounts[1].tokens = 0
-    accounts[2].tokens = 0
+    state_account.tokens = 0
 end