sqlite3.js

'use strict';

var func_sqlite3_prepare_v2 = Module.findExportByName('libsqlite3.dylib', 'sqlite3_prepare_v2');
var func_sqlite3_sql = Module.findExportByName('libsqlite3.dylib', 'sqlite3_sql');
var sqlite3_sql = new NativeFunction(func_sqlite3_sql, 'char', ['pointer']);

Interceptor.attach(func_sqlite3_prepare_v2, {
  onEnter: function(args) {
    var sqlite3_stmt = args[3];
    var output = sqlite3_sql(sqlite3_stmt);
    console.log('SQL: ' + output);
  },

  onLeave: function (retval) {
  	//console.log('Return Value: ' + Memory.readUtf8String(retval));
  }

});

Signature of sqlite3_prepare_v2() // Doc: https://www.sqlite.org/c3ref/prepare.html

  int sqlite3_prepare_v2(
    sqlite3 *db,            // Database handle 
    const char *zSql,       // SQL statement, UTF-8 encoded 
    int nByte,              // Maximum length of zSql in bytes.
    sqlite3_stmt **ppStmt,  // OUT: Statement handle
    const char **pzTail     // OUT: Pointer to unused portion of zSql
  );

Signature of sqlite3_sql() // Doc: http://www.sqlite.org/c3ref/sql.html
const char *sqlite3_sql(sqlite3_stmt *pStmt);

Question: I want to call the sqlite3_sql() method, from the loaded libsqlite3.dylib, by passing the 4th argument of sqlite3_prepare_v2().
But I'm getting the following error:

TypeError: NativeFunction: bad argument count
    at TypeError (native)
    at [object Object].Interceptor.attach.onEnter (repl1.js:10:18)

Line 9 should be:
new NativeFunction(func_sqlite3_sql, 'char', ['pointer'])

Revised the script. Now works as expected. Thanks @riverar