diff --git a/app/providers/ProtocolProvider/protocol/packets/packet.message.ts b/app/providers/ProtocolProvider/protocol/packets/packet.message.ts
index 323908b..52cad0d 100644
--- a/app/providers/ProtocolProvider/protocol/packets/packet.message.ts
+++ b/app/providers/ProtocolProvider/protocol/packets/packet.message.ts
@@ -14,6 +14,12 @@ export interface Attachment {
     blob: string; 
     type: AttachmentType;
     preview: string;
+    transport_tag: string;
+    transport_server: string;
+    /**
+     * Обозначает, для кого закодировано это вложение, нужно для того, чтобы не кодировать и не загружать заново пересланные сообщения, если они уже были закодированы для этого диалога
+     */
+    encoded_for: string;
 } 
 
 export class PacketMessage extends Packet {
@@ -42,7 +48,7 @@ export class PacketMessage extends Packet {
         this.toPublicKey = stream.readString();
         this.content = stream.readString();
         this.chachaKey = stream.readString();
-        this.timestamp = stream.readInt64();
+        this.timestamp = Number(stream.readInt64());
         this.privateKey = stream.readString();
         this.messageId = stream.readString();
         let attachmentsCount = stream.readInt8();
@@ -51,7 +57,10 @@ export class PacketMessage extends Packet {
             let preview = stream.readString();
             let blob = stream.readString();
             let type = stream.readInt8() as AttachmentType;
-            this.attachments.push({id, preview, type, blob});
+            let transport_tag = stream.readString();
+            let transport_server = stream.readString();
+            let encoded_for = stream.readString();            
+            this.attachments.push({id, preview, type, blob, transport_tag, transport_server, encoded_for});
         }
         this.aesChachaKey = stream.readString();
     }
@@ -63,7 +72,7 @@ export class PacketMessage extends Packet {
         stream.writeString(this.toPublicKey);
         stream.writeString(this.content);
         stream.writeString(this.chachaKey);
-        stream.writeInt64(this.timestamp);
+        stream.writeInt64(BigInt(this.timestamp));
         stream.writeString(this.privateKey);
         stream.writeString(this.messageId);
         stream.writeInt8(this.attachments.length);
@@ -72,6 +81,9 @@ export class PacketMessage extends Packet {
             stream.writeString(this.attachments[i].preview);
             stream.writeString(this.attachments[i].blob);
             stream.writeInt8(this.attachments[i].type);
+            stream.writeString(this.attachments[i].transport_tag);
+            stream.writeString(this.attachments[i].transport_server);
+            stream.writeString(this.attachments[i].encoded_for);
         }
         stream.writeString(this.aesChachaKey);
         return stream;
diff --git a/app/providers/ProtocolProvider/protocol/packets/packet.sync.ts b/app/providers/ProtocolProvider/protocol/packets/packet.sync.ts
index b235991..889093b 100644
--- a/app/providers/ProtocolProvider/protocol/packets/packet.sync.ts
+++ b/app/providers/ProtocolProvider/protocol/packets/packet.sync.ts
@@ -18,14 +18,14 @@ export class PacketSync extends Packet {
 
     public _receive(stream: Stream): void {
         this.status = stream.readInt8() as SyncStatus;
-        this.timestamp = stream.readInt64();
+        this.timestamp = Number(stream.readInt64());
     }
 
     public _send(): Promise<Stream> | Stream {
         let stream = new Stream();
         stream.writeInt16(this.getPacketId());
         stream.writeInt8(this.status);
-        stream.writeInt64(this.timestamp);
+        stream.writeInt64(BigInt(this.timestamp));
         return stream;
     }
 
diff --git a/app/providers/ProtocolProvider/protocol/stream.ts b/app/providers/ProtocolProvider/protocol/stream.ts
index d82acfb..a38512b 100644
--- a/app/providers/ProtocolProvider/protocol/stream.ts
+++ b/app/providers/ProtocolProvider/protocol/stream.ts
@@ -1,151 +1,372 @@
 export default class Stream {
-    
-    private _stream: number[];
-    private _readPoiner: number = 0;
-    private _writePointer: number = 0;
+  private stream: Uint8Array;
+  private readPointer = 0;  // bits
+  private writePointer = 0; // bits
 
-    constructor(stream : number[] = []) {
-        this._stream = stream;
+  constructor(stream?: Uint8Array | number[]) {
+    if (!stream) {
+      this.stream = new Uint8Array(0);
+    } else {
+      const src = stream instanceof Uint8Array ? stream : Uint8Array.from(stream);
+      this.stream = src;
+      this.writePointer = this.stream.length << 3;
+    }
+  }
+
+  getStream(): Uint8Array {
+    return this.stream.slice(0, this.length());
+  }
+
+  setStream(stream?: Uint8Array | number[]) {
+    if (!stream) {
+      this.stream = new Uint8Array(0);
+      this.readPointer = 0;
+      this.writePointer = 0;
+      return;
+    }
+    const src = stream instanceof Uint8Array ? stream : Uint8Array.from(stream);
+    this.stream = src;
+    this.readPointer = 0;
+    this.writePointer = this.stream.length << 3;
+  }
+
+  getBuffer(): Uint8Array {
+    return this.getStream();
+  }
+
+  isEmpty(): boolean {
+    return this.writePointer === 0;
+  }
+
+  length(): number {
+    return (this.writePointer + 7) >> 3;
+  }
+
+  // ---------- bit / boolean ----------
+
+  writeBit(value: number) {
+    this.writeBits(BigInt(value & 1), 1);
+  }
+
+  readBit(): number {
+    return Number(this.readBits(1));
+  }
+
+  writeBoolean(value: boolean) {
+    this.writeBit(value ? 1 : 0);
+  }
+
+  readBoolean(): boolean {
+    return this.readBit() === 1;
+  }
+
+  // ---------- byte ----------
+
+  writeByte(b: number) {
+    this.writeUInt8(b & 0xff);
+  }
+
+  readByte(): number {
+    const v = this.readUInt8();
+    return (v << 24) >> 24; // signed byte
+  }
+
+  // ---------- UInt / Int 8 ----------
+
+  writeUInt8(value: number) {
+    const v = value & 0xff;
+
+    if ((this.writePointer & 7) === 0) {
+      this.reserveBits(8);
+      this.stream[this.writePointer >> 3] = v;
+      this.writePointer += 8;
+      return;
     }
 
-    public getStream(): number[] {
-        return this._stream;
+    this.writeBits(BigInt(v), 8);
+  }
+
+  readUInt8(): number {
+    if (this.remainingBits() < 8n) {
+      throw new Error("Not enough bits to read UInt8");
     }
 
-    public setStream(stream: number[]) {
-        this._stream = stream;
+    if ((this.readPointer & 7) === 0) {
+      const v = this.stream[this.readPointer >> 3] & 0xff;
+      this.readPointer += 8;
+      return v;
     }
 
-    public writeInt8(value: number) {
-        const negationBit = value < 0 ? 1 : 0;
-        const int8Value = Math.abs(value) & 0xFF;
-        this._stream[this._writePointer >> 3] |= negationBit << (7 - (this._writePointer & 7));
-        this._writePointer++;
-        for (let i = 0; i < 8; i++) {
-            const bit = (int8Value >> (7 - i)) & 1;
-            this._stream[this._writePointer >> 3] |= bit << (7 - (this._writePointer & 7));
-            this._writePointer++;
-        }
+    return Number(this.readBits(8));
+  }
+
+  writeInt8(value: number) {
+    this.writeUInt8(value);
+  }
+
+  readInt8(): number {
+    const u = this.readUInt8();
+    return (u << 24) >> 24;
+  }
+
+  // ---------- UInt / Int 16 ----------
+
+  writeUInt16(value: number) {
+    const v = value & 0xffff;
+    this.writeUInt8((v >>> 8) & 0xff);
+    this.writeUInt8(v & 0xff);
+  }
+
+  readUInt16(): number {
+    const hi = this.readUInt8();
+    const lo = this.readUInt8();
+    return (hi << 8) | lo;
+  }
+
+  writeInt16(value: number) {
+    this.writeUInt16(value);
+  }
+
+  readInt16(): number {
+    const u = this.readUInt16();
+    return (u << 16) >> 16;
+  }
+
+  // ---------- UInt / Int 32 ----------
+
+  writeUInt32(value: number) {
+    if (!Number.isFinite(value) || value < 0 || value > 0xffffffff) {
+      throw new Error(`UInt32 out of range: ${value}`);
     }
 
-    public readInt8(): number {
-        let value = 0;
-        const negationBit = (this._stream[this._readPoiner >> 3] >> (7 - (this._readPoiner & 7))) & 1;
-        this._readPoiner++;
-        for (let i = 0; i < 8; i++) {
-            const bit = (this._stream[this._readPoiner >> 3] >> (7 - (this._readPoiner & 7))) & 1;
-            value |= bit << (7 - i);
-            this._readPoiner++;
-        }
-        return negationBit ? -value : value;
+    const v = Math.floor(value);
+    this.writeUInt8((v >>> 24) & 0xff);
+    this.writeUInt8((v >>> 16) & 0xff);
+    this.writeUInt8((v >>> 8) & 0xff);
+    this.writeUInt8(v & 0xff);
+  }
+
+  readUInt32(): number {
+    const b1 = this.readUInt8();
+    const b2 = this.readUInt8();
+    const b3 = this.readUInt8();
+    const b4 = this.readUInt8();
+    return (((b1 * 0x1000000) + (b2 << 16) + (b3 << 8) + b4) >>> 0);
+  }
+
+  writeInt32(value: number) {
+    this.writeUInt32(value >>> 0);
+  }
+
+  readInt32(): number {
+    return this.readUInt32() | 0;
+  }
+
+  // ---------- UInt / Int 64 ----------
+
+  writeUInt64(value: bigint) {
+    if (value < 0n || value > 0xffff_ffff_ffff_ffffn) {
+      throw new Error(`UInt64 out of range: ${value.toString()}`);
     }
 
-    public writeBit(value: number) {
-        const bit = value & 1;
-        this._stream[this._writePointer >> 3] |= bit << (7 - (this._writePointer & 7));
-        this._writePointer++;
+    this.writeUInt8(Number((value >> 56n) & 0xffn));
+    this.writeUInt8(Number((value >> 48n) & 0xffn));
+    this.writeUInt8(Number((value >> 40n) & 0xffn));
+    this.writeUInt8(Number((value >> 32n) & 0xffn));
+    this.writeUInt8(Number((value >> 24n) & 0xffn));
+    this.writeUInt8(Number((value >> 16n) & 0xffn));
+    this.writeUInt8(Number((value >> 8n) & 0xffn));
+    this.writeUInt8(Number(value & 0xffn));
+  }
+
+  readUInt64(): bigint {
+    const high = BigInt(this.readUInt32() >>> 0);
+    const low = BigInt(this.readUInt32() >>> 0);
+    return (high << 32n) | low;
+  }
+
+  writeInt64(value: bigint) {
+    const u = BigInt.asUintN(64, value);
+    this.writeUInt64(u);
+  }
+
+  readInt64(): bigint {
+    return BigInt.asIntN(64, this.readUInt64());
+  }
+
+  // ---------- float ----------
+
+  writeFloat32(value: number) {
+    const ab = new ArrayBuffer(4);
+    const dv = new DataView(ab);
+    dv.setFloat32(0, value, false); // big-endian
+    this.writeUInt8(dv.getUint8(0));
+    this.writeUInt8(dv.getUint8(1));
+    this.writeUInt8(dv.getUint8(2));
+    this.writeUInt8(dv.getUint8(3));
+  }
+
+  readFloat32(): number {
+    const ab = new ArrayBuffer(4);
+    const dv = new DataView(ab);
+    dv.setUint8(0, this.readUInt8());
+    dv.setUint8(1, this.readUInt8());
+    dv.setUint8(2, this.readUInt8());
+    dv.setUint8(3, this.readUInt8());
+    return dv.getFloat32(0, false); // big-endian
+  }
+
+  // ---------- string / bytes ----------
+  // String: length(UInt32) + chars(UInt16), как в Java charAt()
+
+  writeString(value: string | null | undefined) {
+    const s = value ?? "";
+    this.writeUInt32(s.length);
+
+    if (s.length === 0) return;
+
+    this.reserveBits(BigInt(s.length) * 16n);
+    for (let i = 0; i < s.length; i++) {
+      this.writeUInt16(s.charCodeAt(i) & 0xffff);
+    }
+  }
+
+  readString(): string {
+    const len = this.readUInt32();
+    if (len > 0x7fffffff) {
+      throw new Error(`String length too large: ${len}`);
     }
 
-    public readBit(): number {
-        const bit = (this._stream[this._readPoiner >> 3] >> (7 - (this._readPoiner & 7))) & 1;
-        this._readPoiner++;
-        return bit;
+    const requiredBits = BigInt(len) * 16n;
+    if (requiredBits > this.remainingBits()) {
+      throw new Error("Not enough bits to read string");
     }
 
-    public writeBoolean(value: boolean) {
-        this.writeBit(value ? 1 : 0);
+    const chars = new Array<number>(len);
+    for (let i = 0; i < len; i++) {
+      chars[i] = this.readUInt16();
+    }
+    return String.fromCharCode(...chars);
+  }
+
+  // byte[]: length(UInt32) + payload
+  writeBytes(value: Uint8Array | number[] | null | undefined) {
+    const arr = value == null
+      ? new Uint8Array(0)
+      : (value instanceof Uint8Array ? value : Uint8Array.from(value));
+
+    this.writeUInt32(arr.length);
+    if (arr.length === 0) return;
+
+    this.reserveBits(BigInt(arr.length) * 8n);
+
+    if ((this.writePointer & 7) === 0) {
+      const byteIndex = this.writePointer >> 3;
+      this.ensureCapacity(byteIndex + arr.length - 1);
+      this.stream.set(arr, byteIndex);
+      this.writePointer += arr.length << 3;
+      return;
     }
 
-    public readBoolean(): boolean {
-        return this.readBit() === 1;
+    for (let i = 0; i < arr.length; i++) {
+      this.writeUInt8(arr[i]);
     }
- 
-    public writeInt16(value: number) {
-        this.writeInt8(value >> 8);
-        this.writeInt8(value & 0xFF);
+  }
+
+  readBytes(): Uint8Array {
+    const len = this.readUInt32();
+    if (len === 0) return new Uint8Array(0);
+
+    const requiredBits = BigInt(len) * 8n;
+    if (requiredBits > this.remainingBits()) {
+      return new Uint8Array(0);
     }
 
-    public readInt16(): number {
-        const value = this.readInt8() << 8;
-        return value | this.readInt8();
+    const out = new Uint8Array(len);
+
+    if ((this.readPointer & 7) === 0) {
+      const byteIndex = this.readPointer >> 3;
+      out.set(this.stream.slice(byteIndex, byteIndex + len));
+      this.readPointer += len << 3;
+      return out;
     }
 
-    public writeInt32(value: number) {
-        this.writeInt16(value >> 16);
-        this.writeInt16(value & 0xFFFF);
+    for (let i = 0; i < len; i++) {
+      out[i] = this.readUInt8();
+    }
+    return out;
+  }
+
+  // ---------- internals ----------
+
+  private remainingBits(): bigint {
+    return BigInt(this.writePointer - this.readPointer);
+  }
+
+  private writeBits(value: bigint, bits: number) {
+    if (bits <= 0) return;
+
+    this.reserveBits(bits);
+
+    for (let i = bits - 1; i >= 0; i--) {
+      const bit = Number((value >> BigInt(i)) & 1n);
+      const byteIndex = this.writePointer >> 3;
+      const shift = 7 - (this.writePointer & 7);
+
+      if (bit === 1) {
+        this.stream[byteIndex] = this.stream[byteIndex] | (1 << shift);
+      } else {
+        this.stream[byteIndex] = this.stream[byteIndex] & ~(1 << shift);
+      }
+      this.writePointer++;
+    }
+  }
+
+  private readBits(bits: number): bigint {
+    if (bits <= 0) return 0n;
+    if (this.remainingBits() < BigInt(bits)) {
+      throw new Error("Not enough bits to read");
     }
 
-    public readInt32(): number {
-        const value = this.readInt16() << 16;
-        return value | this.readInt16();
+    let value = 0n;
+    for (let i = 0; i < bits; i++) {
+      const bit = (this.stream[this.readPointer >> 3] >> (7 - (this.readPointer & 7))) & 1;
+      value = (value << 1n) | BigInt(bit);
+      this.readPointer++;
+    }
+    return value;
+  }
+
+  private reserveBits(bitsToWrite: number | bigint) {
+    const bits = typeof bitsToWrite === "number" ? BigInt(bitsToWrite) : bitsToWrite;
+    if (bits <= 0n) return;
+
+    const lastBitIndex = BigInt(this.writePointer) + bits - 1n;
+    if (lastBitIndex < 0n) throw new Error("Bit index overflow");
+
+    const byteIndex = lastBitIndex >> 3n;
+    if (byteIndex > BigInt(Number.MAX_SAFE_INTEGER)) {
+      throw new Error("Stream too large");
     }
 
-    public writeInt64(value: number) {
-        const high = Math.floor(value / 0x100000000);
-        const low = value >>> 0;
-        this.writeInt32(high);
-        this.writeInt32(low);
-    }
-
-    public readInt64(): number {
-        const high = this.readInt32();
-        const low = this.readInt32() >>> 0;
-        return high * 0x100000000 + low;
-    }    
-
-    public writeFloat32(value: number) {
-        const buffer = new ArrayBuffer(4);
-        new DataView(buffer).setFloat32(0, value, true);
-        const float32Value = new Uint32Array(buffer)[0];
-        this.writeInt32(float32Value);
-    }
-
-    public readFloat32(): number {
-        const float32Value = this.readInt32();
-        const buffer = new ArrayBuffer(4);
-        new Uint32Array(buffer)[0] = float32Value;
-        return new DataView(buffer).getFloat32(0, true);
-    }
-
-    public writeString(value: string) {
-        let length = value.length;
-        this.writeInt32(length);
-        for (let i = 0; i < value.length; i++) {
-            this.writeInt16(value.charCodeAt(i));
-        }
-    }
-
-    public readString(): string {
-        let length = this.readInt32();
-        /**
-         * Фикс уязвимости с длинной строки, превышающей
-         * возможность для чтения _stream
-         */
-        if (length < 0 || length > (this._stream.length - (this._readPoiner >> 3))) {
-            console.info("Stream readString length invalid", length, this._stream.length, this._readPoiner);
-            return "";
-        }
-        let value = "";
-        for (let i = 0; i < length; i++) {
-            value += String.fromCharCode(this.readInt16());
-        }
-        return value;
-    }
-
-    public writeBytes(value: number[]) {
-        this.writeInt32(value.length);
-        for (let i = 0; i < value.length; i++) {
-            this.writeInt8(value[i]);
-        }
-    }
-
-    public readBytes(): number[] {
-        let length = this.readInt32();
-        let value : any = [];
-        for (let i = 0; i < length; i++) {
-            value.push(this.readInt8());
-        }
-        return value;
+    this.ensureCapacity(Number(byteIndex));
+  }
+
+  private ensureCapacity(byteIndex: number) {
+    const requiredSize = byteIndex + 1;
+    if (requiredSize <= this.stream.length) return;
+
+    let newSize = this.stream.length === 0 ? 32 : this.stream.length;
+    while (newSize < requiredSize) {
+      if (newSize > (0x7fffffff >> 1)) {
+        newSize = requiredSize;
+        break;
+      }
+      newSize <<= 1;
     }
 
+    const next = new Uint8Array(newSize);
+    next.set(this.stream);
+    this.stream = next;
+  }
 }
\ No newline at end of file