SQLite

     prefix, to ensure that clients do not accidentally depend on
     them.  They have always been documented as internal-use-only, so
     no clients "should" be depending on the old names.
  */
  wasm.bindingSignatures.wasmInternal = [
    ["sqlite3__wasm_db_reset", "int", "sqlite3*"],
    ["sqlite3__wasm_db_vfs", "sqlite3_vfs*", "sqlite3*","string"],



    ["sqlite3__wasm_vfs_create_file", "int",
     "sqlite3_vfs*","string","*", "int"],
    ["sqlite3__wasm_posix_create_file", "int", "string","*", "int"],
    ["sqlite3__wasm_vfs_unlink", "int", "sqlite3_vfs*","string"],
    ["sqlite3__wasm_qfmt_token","string:dealloc", "string","int"]
  ];

  /**
     Install JS<->C struct bindings for the non-opaque struct types we

    return affirmExists ? affirmDbOpen(db) : db;
  };

  const getDefaultDbId = function(){
    return wState.dbList[0] && getDbId(wState.dbList[0]);
  };

  const guessVfs = function(filename){
    const m = /^file:.+(vfs=(\w+))/.exec(filename);
    return sqlite3.capi.sqlite3_vfs_find(m ? m[2] : 0);
  };

  const isSpecialDbFilename = (n)=>{
    return ""===n || ':'===n[0];
  };

  /**
     A level of "organizational abstraction" for the Worker1
     API. Each method in this object must map directly to a Worker1

  const wMsgHandler = {
    open: function(ev){
      const oargs = Object.create(null), args = (ev.args || Object.create(null));
      if(args.simulateError){ // undocumented internal testing option
        toss("Throwing because of simulateError flag.");
      }
      const rc = Object.create(null);
      let byteArray, pVfs;
      oargs.vfs = args.vfs;
      if(isSpecialDbFilename(args.filename)){
        oargs.filename = args.filename || "";
      }else{
        oargs.filename = args.filename;
        byteArray = args.byteArray;
        if(byteArray) pVfs = guessVfs(args.filename);
      }
      if(pVfs){
        /* 2022-11-02: this feature is as-yet untested except that
           sqlite3__wasm_vfs_create_file() has been tested from the
           browser dev console. */
        let pMem;
        try{
          pMem = sqlite3.wasm.allocFromTypedArray(byteArray);
          const rc = util.sqlite3__wasm_vfs_create_file(
            pVfs, oargs.filename, pMem, byteArray.byteLength
          );
          if(rc) sqlite3.SQLite3Error.toss(rc);
        }catch(e){
          throw new sqlite3.SQLite3Error(
            e.name+' creating '+args.filename+": "+e.message, {
              cause: e
            }
          );
        }finally{
          if(pMem) sqlite3.wasm.dealloc(pMem);
        }
      }
      const db = wState.open(oargs);
      rc.filename = db.filename;
      rc.persistent = !!sqlite3.capi.sqlite3_js_db_uses_vfs(db.pointer, "opfs");
      rc.dbId = getDbId(db);
      rc.vfs = db.dbVfsName();
      return rc;
    },

  })
//#endif
  ,
  onerror: (...args)=>console.error('worker1 promiser error',...args)
}/*defaultConfig*/;

/**
   sqlite3Worker1Promiser.v2() works identically to
   sqlite3Worker1Promiser() except that it returns a Promise instead
   of relying an an onready callback in the config object. The Promise
   resolves to the same factory function which
   sqlite3Worker1Promiser() returns.

   If config is-a function or is an object which contains an onready
   function, that function is replaced by a proxy which will resolve