Implement cast from operation to create_proposal_operation

src/hive_fork_manager/shared_lib/operation_types.cpp

@@ -877,4 +877,11 @@ extern "C"
     _operation* op = PG_GETARG_HIVE_OPERATION_PP( 0 );
     return operation_to<hive::protocol::witness_update_operation>(op);
   }
+
+  PG_FUNCTION_INFO_V1( operation_to_create_proposal_operation );
+  Datum operation_to_create_proposal_operation( PG_FUNCTION_ARGS )
+  {
+    _operation* op = PG_GETARG_HIVE_OPERATION_PP( 0 );
+    return operation_to<hive::protocol::create_proposal_operation>(op);
+  }
 }

src/hive_fork_manager/types/casts.sql

@@ -447,3 +447,13 @@ AS 'MODULE_PATHNAME',
 CREATE CAST (hive.operation AS hive.witness_update_operation)
   WITH FUNCTION hive._operation_to_witness_update_operation
   AS ASSIGNMENT;
+
+CREATE OR REPLACE FUNCTION hive._operation_to_create_proposal_operation(
+  hive.operation
+) RETURNS hive.create_proposal_operation LANGUAGE c IMMUTABLE STRICT PARALLEL SAFE
+AS 'MODULE_PATHNAME',
+'operation_to_create_proposal_operation';
+
+CREATE CAST (hive.operation AS hive.create_proposal_operation)
+  WITH FUNCTION hive._operation_to_create_proposal_operation
+  AS ASSIGNMENT;

src/hive_fork_manager/types/types.sql

@@ -465,4 +465,15 @@ CREATE TYPE hive.witness_update_operation AS (
   fee hive.asset
 );
 
+CREATE TYPE hive.create_proposal_operation AS (
+  creator hive.account_name_type,
+  receiver hive.account_name_type,
+  start_date timestamp,
+  end_date timestamp,
+  daily_pay hive.asset,
+  subject TEXT,
+  permlink TEXT,
+  extensions hive.extensions_type
+);
+
 CREATE TYPE hive.void_t AS ();