Avoid variable name clash

sh/common_safe.sh

@@ -92,26 +92,26 @@ declare -r eip712_message_json_template='{
     "nonce": $nonce | tonumber'
 
 eip712_json() {
-    declare -r calldata="$1"
+    declare -r _eip712_json_calldata="$1"
     shift
 
-    declare -i operation
+    declare -i _eip712_json_operation
     if (( $# > 0 )) ; then
-        operation="$1"
+        _eip712_json_operation="$1"
         shift
     else
-        operation=0
+        _eip712_json_operation=0
     fi
-    declare -r -i operation
+    declare -r -i _eip712_json_operation
 
-    declare to
+    declare _eip712_json_to
     if (( $# > 0 )) ; then
-        to="$1"
+        _eip712_json_to="$1"
         shift
     else
-        to="$(target $operation)"
+        _eip712_json_to="$(target $_eip712_json_operation)"
     fi
-    declare -r to
+    declare -r _eip712_json_to
 
     jq -Mc \
     '
@@ -181,9 +181,9 @@ eip712_json() {
     '                                       \
     --arg verifyingContract "$safe_address" \
     --arg chainId "$chainid"                \
-    --arg to "$to"                          \
-    --arg data "$calldata"                  \
-    --arg operation $operation              \
+    --arg to "$_eip712_json_to"             \
+    --arg data "$_eip712_json_calldata"     \
+    --arg operation $_eip712_json_operation \
     --arg nonce $(nonce)                    \
     <<<'{}'
 }