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s=this;if(n==null||i==null)throw new Error("A key and value must be given");o=f(o);s._getObjectStore(function(e,t){if(e)return o(e);try{var r=t.put(i,n)}catch(e){return o(e)}r.onerror=_.bind(this,o);r.onsuccess=function(){if(s._kvStore._channel){s._kvStore._channel.postMessage({method:"set",key:n,value:i})}o(null)}});return o.promise};i.prototype.add=function(n,i,o){var s=this;if(i==null&&n!=null)return s.add(undefined,n,o);if(typeof i==="function"||i==null&&o==null)return s.add(undefined,n,i);if(i==null)throw new Error("A value must be provided as an argument");o=f(o);s._getObjectStore(function(e,t){if(e)return o(e);try{var r=n==null?t.add(i):t.add(i,n)}catch(e){return o(e)}r.onerror=_.bind(this,o);r.onsuccess=function(){if(s._kvStore._channel){s._kvStore._channel.postMessage({method:"add",key:n,value:i})}o(null)}});return o.promise};i.prototype.get=function(n,i){var e=this;if(n==null)throw new Error("A key must be given as an 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r(e);if(t){n[t.key]=t.value;t.continue()}else{r(null,n)}});return r.promise};i.prototype.keys=function(e,r){var t=this;if(typeof e==="function")return t.keys(null,e);r=f(r);var n=[];t.iterator(e,function(e,t){if(e)return r(e);if(t){n.push(t.key);t.continue()}else{r(null,n)}});return r.promise};i.prototype.values=function(e,r){var t=this;if(typeof e==="function")return t.values(null,e);r=f(r);var n=[];t.iterator(e,function(e,t){if(e)return r(e);if(t){n.push(t.value);t.continue()}else{r(null,n)}});return r.promise};i.prototype.remove=function(n,i){var o=this;if(n==null)throw new Error("A key must be given as an argument");i=f(i);o._getObjectStore(function(e,t){if(e)return i(e);try{var r=t.delete(n)}catch(e){return i(e)}r.onerror=_.bind(this,i);r.onsuccess=function(){if(o._kvStore._channel){o._kvStore._channel.postMessage({method:"remove",key:n})}i(null)}});return i.promise};i.prototype.clear=function(n){var e=this;n=f(n);e._getObjectStore(function(e,t){if(e)return n(e);try{var r=t.clear()}catch(e){return n(e)}r.onerror=_.bind(this,n);r.onsuccess=function(){n(null)}});return n.promise};i.prototype.count=function(n,i){var e=this;if(typeof n==="function")return e.count(null,n);i=f(i);e._getObjectStore(function(e,t){if(e)return i(e);try{var r=n==null?t.count():t.count(n)}catch(e){return i(e)}r.onerror=_.bind(this,i);r.onsuccess=function(e){i(null,e.target.result)}});return i.promise};i.prototype.iterator=function(n,i){var e=this;if(typeof n==="function")return e.iterator(null,n);if(typeof i!=="function")throw new Error("A function must be given");e._getObjectStore(function(e,t){if(e)return i(e);try{var r=n==null?t.openCursor():t.openCursor(n)}catch(e){return i(e)}r.onerror=_.bind(this,i);r.onsuccess=function(e){var t=e.target.result;i(null,t)}})};i.prototype.abort=function(){if(this.finished)throw new Error("Transaction is finished");if(this._objectStore)this._objectStore.transaction.abort();this._close(new Error("Transaction 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