Starting on one-way sync

src/com/commit.ts

@@ -0,0 +1,177 @@
+export default interface Commit {
+   id: string;
+   root: string;
+   before: string;
+   merge: string;
+   date: number;
+}
+export function serialize_Commit (data: Commit): Uint8Array {
+   let fields: ArrayBuffer[] = [];
+   const addBuffer = (buffer:ArrayBuffer) => fields.push(buffer);
+   const makeField = (payload_length: number, label: number, type: number) => {
+      let b = new ArrayBuffer(3 + payload_length);
+      new DataView(b).setUint16(0, label);
+      new DataView(b).setUint8(2, type);
+      fields.push(b);
+      return new DataView(b, 3);
+   }
+
+   const makeArrayBuffer = (payload_length: number) => {
+      let b = new ArrayBuffer(payload_length);
+      fields.push(b)
+      return new DataView(b)
+   }
+
+   const getAutoGrowLength = (length: number | bigint) => {
+      if (typeof length === "number") length = BigInt(length);
+      const lt1 = length >= BigInt(Math.pow(2, 15)) ? 0x8000 : 0;
+      const lt2 = length >= BigInt(Math.pow(2, 30)) ? 0x8000 : 0;
+      const lt3 = length >= BigInt(Math.pow(2, 45)) ? 0x8000 : 0;
+      const lt4 = length >= BigInt(Math.pow(2, 61));
+      if (lt4) throw new Error("Payload to large!");
+      let blen = BigInt(length);
+      const u16_1 = (Number(blen >> BigInt(0)) & 0x7fff) | lt1;
+      const u16_2 = (Number(blen >> BigInt(15)) & 0x7fff) | lt2;
+      const u16_3 = (Number(blen >> BigInt(30)) & 0x7fff) | lt3;
+      const u16_4 = Number(blen >> BigInt(45)) & 0xffff;
+      const ld: number[] = [u16_1];
+      if (lt1 != 0) ld.push(u16_2);
+      if (lt2 != 0) ld.push(u16_3);
+      if (lt3 != 0) ld.push(u16_4);
+      const dv = new DataView(new ArrayBuffer(ld.length * 2))
+      for(let i = 0; i < ld.length; i++) {
+      dv.setUint16(i * 2, ld[i])
+      }
+      return dv.buffer;
+   }
+
+   let nrOfFields = 0;
+   if(data["id"] !== null && data["id"] !== undefined ) {
+      nrOfFields++;
+      const str = new TextEncoder().encode(data["id"]);
+      const lengthBytes = getAutoGrowLength(str.byteLength);
+      const f = makeField(str.byteLength + lengthBytes.byteLength, 0, 21);
+      new Uint8Array(f.buffer, f.byteOffset).set(new Uint8Array(lengthBytes), 0);
+      new Uint8Array(f.buffer, f.byteOffset).set(str, lengthBytes.byteLength);
+   }
+
+   if(data["root"] !== null && data["root"] !== undefined ) {
+      nrOfFields++;
+      const str = new TextEncoder().encode(data["root"]);
+      const lengthBytes = getAutoGrowLength(str.byteLength);
+      const f = makeField(str.byteLength + lengthBytes.byteLength, 1, 21);
+      new Uint8Array(f.buffer, f.byteOffset).set(new Uint8Array(lengthBytes), 0);
+      new Uint8Array(f.buffer, f.byteOffset).set(str, lengthBytes.byteLength);
+   }
+
+   if(data["before"] !== null && data["before"] !== undefined ) {
+      nrOfFields++;
+      const str = new TextEncoder().encode(data["before"]);
+      const lengthBytes = getAutoGrowLength(str.byteLength);
+      const f = makeField(str.byteLength + lengthBytes.byteLength, 2, 21);
+      new Uint8Array(f.buffer, f.byteOffset).set(new Uint8Array(lengthBytes), 0);
+      new Uint8Array(f.buffer, f.byteOffset).set(str, lengthBytes.byteLength);
+   }
+
+   if(data["merge"] !== null && data["merge"] !== undefined ) {
+      nrOfFields++;
+      const str = new TextEncoder().encode(data["merge"]);
+      const lengthBytes = getAutoGrowLength(str.byteLength);
+      const f = makeField(str.byteLength + lengthBytes.byteLength, 3, 21);
+      new Uint8Array(f.buffer, f.byteOffset).set(new Uint8Array(lengthBytes), 0);
+      new Uint8Array(f.buffer, f.byteOffset).set(str, lengthBytes.byteLength);
+   }
+
+   if(data["date"] !== null && data["date"] !== undefined ) {
+      nrOfFields++;
+      const f = makeField(8, 4, 8);
+      f.setBigUint64(0, BigInt(data["date"]));
+   }
+
+
+   const fieldsLength = fields.reduce((a, b) => b.byteLength + a, 0);
+
+
+   const result = new ArrayBuffer(fieldsLength + 2);
+   const resultC = new Uint8Array(result);
+   new DataView(result).setUint16(0, nrOfFields);
+
+   let offset = 2;
+   for (const buf of fields) {
+      resultC.set(new Uint8Array(buf), offset);
+      offset += buf.byteLength;
+   }
+
+   return new Uint8Array(result);
+}
+
+export function deserialize_Commit (data: Uint8Array): Commit {
+   const view = new DataView(data.buffer, data.byteOffset)
+   let idx = 0;
+   const readAutoGrowLength = () => {
+      let result = BigInt(0);
+      const v1 = view.getUint16(idx); idx += 2;
+      const u16_1 = v1 & 0x7fff;
+      result = result | (BigInt(u16_1) << BigInt(0));
+      if ((v1 & 0x8000) > 0) {
+         const v2 = view.getUint16(idx); idx += 2;
+         const u16_2 = v2 & 0x7fff;
+         result = result | (BigInt(u16_2) << BigInt(15));
+         if ((v2 & 0x8000) > 0) {
+            const v3 = view.getUint16(idx); idx += 2;
+            const u16_3 = v3 & 0x7fff;
+            result = result | (BigInt(u16_3) << BigInt(30));
+            if ((v3 & 0x8000) > 0) {
+               const v4 = view.getUint16(idx); idx += 2;
+               const u16_4 = v4;
+               result = result | (BigInt(u16_4) << BigInt(45));
+            }
+         }
+      }
+      return Number(result);
+   }
+   let result: any = {}
+   const nrOfFields = view.getUint16(idx); idx += 2;
+   for(let i = 0; i < nrOfFields; i++) {
+      const fieldLabel = view.getUint16(idx); idx += 2;
+      const fieldType = view.getUint8(idx); idx += 1;
+      switch(fieldLabel) {
+         case 0: {
+            const fieldDataLength = readAutoGrowLength()
+            const fieldDataUint8 = data.slice(idx, idx + fieldDataLength); idx += fieldDataLength;
+            const str = new TextDecoder().decode(fieldDataUint8);
+            result["id"] = str;
+            break;
+         }
+         case 1: {
+            const fieldDataLength = readAutoGrowLength()
+            const fieldDataUint8 = data.slice(idx, idx + fieldDataLength); idx += fieldDataLength;
+            const str = new TextDecoder().decode(fieldDataUint8);
+            result["root"] = str;
+            break;
+         }
+         case 2: {
+            const fieldDataLength = readAutoGrowLength()
+            const fieldDataUint8 = data.slice(idx, idx + fieldDataLength); idx += fieldDataLength;
+            const str = new TextDecoder().decode(fieldDataUint8);
+            result["before"] = str;
+            break;
+         }
+         case 3: {
+            const fieldDataLength = readAutoGrowLength()
+            const fieldDataUint8 = data.slice(idx, idx + fieldDataLength); idx += fieldDataLength;
+            const str = new TextDecoder().decode(fieldDataUint8);
+            result["merge"] = str;
+            break;
+         }
+         case 4: {
+            result["date"] = Number(view.getBigUint64(idx)); idx += 8;
+            break;
+         }
+         default:
+            throw new Error("Invalid label found: " + fieldLabel)
+            break;
+      }
+   }
+   return result;
+}

src/com/pullgetlogrequest.ts

@@ -0,0 +1,126 @@
+export default interface PullGetLogRequest {
+   limit: number;
+   start: string;
+}
+export function serialize_PullGetLogRequest (data: PullGetLogRequest): Uint8Array {
+   let fields: ArrayBuffer[] = [];
+   const addBuffer = (buffer:ArrayBuffer) => fields.push(buffer);
+   const makeField = (payload_length: number, label: number, type: number) => {
+      let b = new ArrayBuffer(3 + payload_length);
+      new DataView(b).setUint16(0, label);
+      new DataView(b).setUint8(2, type);
+      fields.push(b);
+      return new DataView(b, 3);
+   }
+
+   const makeArrayBuffer = (payload_length: number) => {
+      let b = new ArrayBuffer(payload_length);
+      fields.push(b)
+      return new DataView(b)
+   }
+
+   const getAutoGrowLength = (length: number | bigint) => {
+      if (typeof length === "number") length = BigInt(length);
+      const lt1 = length >= BigInt(Math.pow(2, 15)) ? 0x8000 : 0;
+      const lt2 = length >= BigInt(Math.pow(2, 30)) ? 0x8000 : 0;
+      const lt3 = length >= BigInt(Math.pow(2, 45)) ? 0x8000 : 0;
+      const lt4 = length >= BigInt(Math.pow(2, 61));
+      if (lt4) throw new Error("Payload to large!");
+      let blen = BigInt(length);
+      const u16_1 = (Number(blen >> BigInt(0)) & 0x7fff) | lt1;
+      const u16_2 = (Number(blen >> BigInt(15)) & 0x7fff) | lt2;
+      const u16_3 = (Number(blen >> BigInt(30)) & 0x7fff) | lt3;
+      const u16_4 = Number(blen >> BigInt(45)) & 0xffff;
+      const ld: number[] = [u16_1];
+      if (lt1 != 0) ld.push(u16_2);
+      if (lt2 != 0) ld.push(u16_3);
+      if (lt3 != 0) ld.push(u16_4);
+      const dv = new DataView(new ArrayBuffer(ld.length * 2))
+      for(let i = 0; i < ld.length; i++) {
+      dv.setUint16(i * 2, ld[i])
+      }
+      return dv.buffer;
+   }
+
+   let nrOfFields = 0;
+   if(data["limit"] !== null && data["limit"] !== undefined ) {
+      nrOfFields++;
+      const f = makeField(4, 0, 7);
+      f.setUint32(0, data["limit"]);
+   }
+
+   if(data["start"] !== null && data["start"] !== undefined ) {
+      nrOfFields++;
+      const str = new TextEncoder().encode(data["start"]);
+      const lengthBytes = getAutoGrowLength(str.byteLength);
+      const f = makeField(str.byteLength + lengthBytes.byteLength, 1, 21);
+      new Uint8Array(f.buffer, f.byteOffset).set(new Uint8Array(lengthBytes), 0);
+      new Uint8Array(f.buffer, f.byteOffset).set(str, lengthBytes.byteLength);
+   }
+
+
+   const fieldsLength = fields.reduce((a, b) => b.byteLength + a, 0);
+
+
+   const result = new ArrayBuffer(fieldsLength + 2);
+   const resultC = new Uint8Array(result);
+   new DataView(result).setUint16(0, nrOfFields);
+
+   let offset = 2;
+   for (const buf of fields) {
+      resultC.set(new Uint8Array(buf), offset);
+      offset += buf.byteLength;
+   }
+
+   return new Uint8Array(result);
+}
+
+export function deserialize_PullGetLogRequest (data: Uint8Array): PullGetLogRequest {
+   const view = new DataView(data.buffer, data.byteOffset)
+   let idx = 0;
+   const readAutoGrowLength = () => {
+      let result = BigInt(0);
+      const v1 = view.getUint16(idx); idx += 2;
+      const u16_1 = v1 & 0x7fff;
+      result = result | (BigInt(u16_1) << BigInt(0));
+      if ((v1 & 0x8000) > 0) {
+         const v2 = view.getUint16(idx); idx += 2;
+         const u16_2 = v2 & 0x7fff;
+         result = result | (BigInt(u16_2) << BigInt(15));
+         if ((v2 & 0x8000) > 0) {
+            const v3 = view.getUint16(idx); idx += 2;
+            const u16_3 = v3 & 0x7fff;
+            result = result | (BigInt(u16_3) << BigInt(30));
+            if ((v3 & 0x8000) > 0) {
+               const v4 = view.getUint16(idx); idx += 2;
+               const u16_4 = v4;
+               result = result | (BigInt(u16_4) << BigInt(45));
+            }
+         }
+      }
+      return Number(result);
+   }
+   let result: any = {}
+   const nrOfFields = view.getUint16(idx); idx += 2;
+   for(let i = 0; i < nrOfFields; i++) {
+      const fieldLabel = view.getUint16(idx); idx += 2;
+      const fieldType = view.getUint8(idx); idx += 1;
+      switch(fieldLabel) {
+         case 0: {
+            result["limit"] = view.getUint32(idx); idx += 4;
+            break;
+         }
+         case 1: {
+            const fieldDataLength = readAutoGrowLength()
+            const fieldDataUint8 = data.slice(idx, idx + fieldDataLength); idx += fieldDataLength;
+            const str = new TextDecoder().decode(fieldDataUint8);
+            result["start"] = str;
+            break;
+         }
+         default:
+            throw new Error("Invalid label found: " + fieldLabel)
+            break;
+      }
+   }
+   return result;
+}

src/com/pullgetlogresponse.ts

@@ -0,0 +1,125 @@
+import Commit, { serialize_Commit, deserialize_Commit} from "./commit";
+export default interface PullGetLogResponse {
+   commits: Commit[];
+}
+export function serialize_PullGetLogResponse (data: PullGetLogResponse): Uint8Array {
+   let fields: ArrayBuffer[] = [];
+   const addBuffer = (buffer:ArrayBuffer) => fields.push(buffer);
+   const makeField = (payload_length: number, label: number, type: number) => {
+      let b = new ArrayBuffer(3 + payload_length);
+      new DataView(b).setUint16(0, label);
+      new DataView(b).setUint8(2, type);
+      fields.push(b);
+      return new DataView(b, 3);
+   }
+
+   const makeArrayBuffer = (payload_length: number) => {
+      let b = new ArrayBuffer(payload_length);
+      fields.push(b)
+      return new DataView(b)
+   }
+
+   const getAutoGrowLength = (length: number | bigint) => {
+      if (typeof length === "number") length = BigInt(length);
+      const lt1 = length >= BigInt(Math.pow(2, 15)) ? 0x8000 : 0;
+      const lt2 = length >= BigInt(Math.pow(2, 30)) ? 0x8000 : 0;
+      const lt3 = length >= BigInt(Math.pow(2, 45)) ? 0x8000 : 0;
+      const lt4 = length >= BigInt(Math.pow(2, 61));
+      if (lt4) throw new Error("Payload to large!");
+      let blen = BigInt(length);
+      const u16_1 = (Number(blen >> BigInt(0)) & 0x7fff) | lt1;
+      const u16_2 = (Number(blen >> BigInt(15)) & 0x7fff) | lt2;
+      const u16_3 = (Number(blen >> BigInt(30)) & 0x7fff) | lt3;
+      const u16_4 = Number(blen >> BigInt(45)) & 0xffff;
+      const ld: number[] = [u16_1];
+      if (lt1 != 0) ld.push(u16_2);
+      if (lt2 != 0) ld.push(u16_3);
+      if (lt3 != 0) ld.push(u16_4);
+      const dv = new DataView(new ArrayBuffer(ld.length * 2))
+      for(let i = 0; i < ld.length; i++) {
+      dv.setUint16(i * 2, ld[i])
+      }
+      return dv.buffer;
+   }
+
+   let nrOfFields = 0;
+   if(data["commits"] !== null && data["commits"] !== undefined ) {
+      nrOfFields++;
+      makeField(0, 0, 40)
+      const len = data["commits"].length
+      addBuffer(getAutoGrowLength(len))
+      for(let i = 0; i < len ; i++) {
+         const subFieldData = serialize_Commit(data["commits"][i]);
+         const lengthBytes = getAutoGrowLength(subFieldData.byteLength);
+         const f = makeArrayBuffer(subFieldData.byteLength + lengthBytes.byteLength)
+         new Uint8Array(f.buffer, f.byteOffset).set(new Uint8Array(lengthBytes), 0);
+         new Uint8Array(f.buffer, f.byteOffset).set(new Uint8Array(subFieldData), lengthBytes.byteLength);
+      }
+   }
+
+
+   const fieldsLength = fields.reduce((a, b) => b.byteLength + a, 0);
+
+
+   const result = new ArrayBuffer(fieldsLength + 2);
+   const resultC = new Uint8Array(result);
+   new DataView(result).setUint16(0, nrOfFields);
+
+   let offset = 2;
+   for (const buf of fields) {
+      resultC.set(new Uint8Array(buf), offset);
+      offset += buf.byteLength;
+   }
+
+   return new Uint8Array(result);
+}
+
+export function deserialize_PullGetLogResponse (data: Uint8Array): PullGetLogResponse {
+   const view = new DataView(data.buffer, data.byteOffset)
+   let idx = 0;
+   const readAutoGrowLength = () => {
+      let result = BigInt(0);
+      const v1 = view.getUint16(idx); idx += 2;
+      const u16_1 = v1 & 0x7fff;
+      result = result | (BigInt(u16_1) << BigInt(0));
+      if ((v1 & 0x8000) > 0) {
+         const v2 = view.getUint16(idx); idx += 2;
+         const u16_2 = v2 & 0x7fff;
+         result = result | (BigInt(u16_2) << BigInt(15));
+         if ((v2 & 0x8000) > 0) {
+            const v3 = view.getUint16(idx); idx += 2;
+            const u16_3 = v3 & 0x7fff;
+            result = result | (BigInt(u16_3) << BigInt(30));
+            if ((v3 & 0x8000) > 0) {
+               const v4 = view.getUint16(idx); idx += 2;
+               const u16_4 = v4;
+               result = result | (BigInt(u16_4) << BigInt(45));
+            }
+         }
+      }
+      return Number(result);
+   }
+   let result: any = {}
+   const nrOfFields = view.getUint16(idx); idx += 2;
+   for(let i = 0; i < nrOfFields; i++) {
+      const fieldLabel = view.getUint16(idx); idx += 2;
+      const fieldType = view.getUint8(idx); idx += 1;
+      switch(fieldLabel) {
+         case 0: {
+            const arrayLength = readAutoGrowLength();
+            const values: any[] = []
+            for(let i = 0; i < arrayLength; i++) {
+               const subFieldLength = readAutoGrowLength();
+               const subFieldData = data.slice(idx, idx + subFieldLength); idx += subFieldLength;
+               values[i] = deserialize_Commit(subFieldData);
+            }
+            result["commits"] = values;
+            break;
+         }
+         default:
+            throw new Error("Invalid label found: " + fieldLabel)
+            break;
+      }
+   }
+   return result;
+}

src/com/pullobjectrequest.ts

@@ -0,0 +1,132 @@
+export default interface PullObjectRequest {
+   id: string;
+   type: string;
+}
+export function serialize_PullObjectRequest (data: PullObjectRequest): Uint8Array {
+   let fields: ArrayBuffer[] = [];
+   const addBuffer = (buffer:ArrayBuffer) => fields.push(buffer);
+   const makeField = (payload_length: number, label: number, type: number) => {
+      let b = new ArrayBuffer(3 + payload_length);
+      new DataView(b).setUint16(0, label);
+      new DataView(b).setUint8(2, type);
+      fields.push(b);
+      return new DataView(b, 3);
+   }
+
+   const makeArrayBuffer = (payload_length: number) => {
+      let b = new ArrayBuffer(payload_length);
+      fields.push(b)
+      return new DataView(b)
+   }
+
+   const getAutoGrowLength = (length: number | bigint) => {
+      if (typeof length === "number") length = BigInt(length);
+      const lt1 = length >= BigInt(Math.pow(2, 15)) ? 0x8000 : 0;
+      const lt2 = length >= BigInt(Math.pow(2, 30)) ? 0x8000 : 0;
+      const lt3 = length >= BigInt(Math.pow(2, 45)) ? 0x8000 : 0;
+      const lt4 = length >= BigInt(Math.pow(2, 61));
+      if (lt4) throw new Error("Payload to large!");
+      let blen = BigInt(length);
+      const u16_1 = (Number(blen >> BigInt(0)) & 0x7fff) | lt1;
+      const u16_2 = (Number(blen >> BigInt(15)) & 0x7fff) | lt2;
+      const u16_3 = (Number(blen >> BigInt(30)) & 0x7fff) | lt3;
+      const u16_4 = Number(blen >> BigInt(45)) & 0xffff;
+      const ld: number[] = [u16_1];
+      if (lt1 != 0) ld.push(u16_2);
+      if (lt2 != 0) ld.push(u16_3);
+      if (lt3 != 0) ld.push(u16_4);
+      const dv = new DataView(new ArrayBuffer(ld.length * 2))
+      for(let i = 0; i < ld.length; i++) {
+      dv.setUint16(i * 2, ld[i])
+      }
+      return dv.buffer;
+   }
+
+   let nrOfFields = 0;
+   if(data["id"] !== null && data["id"] !== undefined ) {
+      nrOfFields++;
+      const str = new TextEncoder().encode(data["id"]);
+      const lengthBytes = getAutoGrowLength(str.byteLength);
+      const f = makeField(str.byteLength + lengthBytes.byteLength, 0, 21);
+      new Uint8Array(f.buffer, f.byteOffset).set(new Uint8Array(lengthBytes), 0);
+      new Uint8Array(f.buffer, f.byteOffset).set(str, lengthBytes.byteLength);
+   }
+
+   if(data["type"] !== null && data["type"] !== undefined ) {
+      nrOfFields++;
+      const str = new TextEncoder().encode(data["type"]);
+      const lengthBytes = getAutoGrowLength(str.byteLength);
+      const f = makeField(str.byteLength + lengthBytes.byteLength, 1, 21);
+      new Uint8Array(f.buffer, f.byteOffset).set(new Uint8Array(lengthBytes), 0);
+      new Uint8Array(f.buffer, f.byteOffset).set(str, lengthBytes.byteLength);
+   }
+
+
+   const fieldsLength = fields.reduce((a, b) => b.byteLength + a, 0);
+
+
+   const result = new ArrayBuffer(fieldsLength + 2);
+   const resultC = new Uint8Array(result);
+   new DataView(result).setUint16(0, nrOfFields);
+
+   let offset = 2;
+   for (const buf of fields) {
+      resultC.set(new Uint8Array(buf), offset);
+      offset += buf.byteLength;
+   }
+
+   return new Uint8Array(result);
+}
+
+export function deserialize_PullObjectRequest (data: Uint8Array): PullObjectRequest {
+   const view = new DataView(data.buffer, data.byteOffset)
+   let idx = 0;
+   const readAutoGrowLength = () => {
+      let result = BigInt(0);
+      const v1 = view.getUint16(idx); idx += 2;
+      const u16_1 = v1 & 0x7fff;
+      result = result | (BigInt(u16_1) << BigInt(0));
+      if ((v1 & 0x8000) > 0) {
+         const v2 = view.getUint16(idx); idx += 2;
+         const u16_2 = v2 & 0x7fff;
+         result = result | (BigInt(u16_2) << BigInt(15));
+         if ((v2 & 0x8000) > 0) {
+            const v3 = view.getUint16(idx); idx += 2;
+            const u16_3 = v3 & 0x7fff;
+            result = result | (BigInt(u16_3) << BigInt(30));
+            if ((v3 & 0x8000) > 0) {
+               const v4 = view.getUint16(idx); idx += 2;
+               const u16_4 = v4;
+               result = result | (BigInt(u16_4) << BigInt(45));
+            }
+         }
+      }
+      return Number(result);
+   }
+   let result: any = {}
+   const nrOfFields = view.getUint16(idx); idx += 2;
+   for(let i = 0; i < nrOfFields; i++) {
+      const fieldLabel = view.getUint16(idx); idx += 2;
+      const fieldType = view.getUint8(idx); idx += 1;
+      switch(fieldLabel) {
+         case 0: {
+            const fieldDataLength = readAutoGrowLength()
+            const fieldDataUint8 = data.slice(idx, idx + fieldDataLength); idx += fieldDataLength;
+            const str = new TextDecoder().decode(fieldDataUint8);
+            result["id"] = str;
+            break;
+         }
+         case 1: {
+            const fieldDataLength = readAutoGrowLength()
+            const fieldDataUint8 = data.slice(idx, idx + fieldDataLength); idx += fieldDataLength;
+            const str = new TextDecoder().decode(fieldDataUint8);
+            result["type"] = str;
+            break;
+         }
+         default:
+            throw new Error("Invalid label found: " + fieldLabel)
+            break;
+      }
+   }
+   return result;
+}

src/com/pullobjectresponse.ts

@@ -0,0 +1,125 @@
+export default interface PullObjectResponse {
+   found: boolean;
+   data: Uint8Array;
+}
+export function serialize_PullObjectResponse (data: PullObjectResponse): Uint8Array {
+   let fields: ArrayBuffer[] = [];
+   const addBuffer = (buffer:ArrayBuffer) => fields.push(buffer);
+   const makeField = (payload_length: number, label: number, type: number) => {
+      let b = new ArrayBuffer(3 + payload_length);
+      new DataView(b).setUint16(0, label);
+      new DataView(b).setUint8(2, type);
+      fields.push(b);
+      return new DataView(b, 3);
+   }
+
+   const makeArrayBuffer = (payload_length: number) => {
+      let b = new ArrayBuffer(payload_length);
+      fields.push(b)
+      return new DataView(b)
+   }
+
+   const getAutoGrowLength = (length: number | bigint) => {
+      if (typeof length === "number") length = BigInt(length);
+      const lt1 = length >= BigInt(Math.pow(2, 15)) ? 0x8000 : 0;
+      const lt2 = length >= BigInt(Math.pow(2, 30)) ? 0x8000 : 0;
+      const lt3 = length >= BigInt(Math.pow(2, 45)) ? 0x8000 : 0;
+      const lt4 = length >= BigInt(Math.pow(2, 61));
+      if (lt4) throw new Error("Payload to large!");
+      let blen = BigInt(length);
+      const u16_1 = (Number(blen >> BigInt(0)) & 0x7fff) | lt1;
+      const u16_2 = (Number(blen >> BigInt(15)) & 0x7fff) | lt2;
+      const u16_3 = (Number(blen >> BigInt(30)) & 0x7fff) | lt3;
+      const u16_4 = Number(blen >> BigInt(45)) & 0xffff;
+      const ld: number[] = [u16_1];
+      if (lt1 != 0) ld.push(u16_2);
+      if (lt2 != 0) ld.push(u16_3);
+      if (lt3 != 0) ld.push(u16_4);
+      const dv = new DataView(new ArrayBuffer(ld.length * 2))
+      for(let i = 0; i < ld.length; i++) {
+      dv.setUint16(i * 2, ld[i])
+      }
+      return dv.buffer;
+   }
+
+   let nrOfFields = 0;
+   if(data["found"] !== null && data["found"] !== undefined ) {
+      nrOfFields++;
+      const f = makeField(1, 0, 5);
+      f.setUint8(0, Number(data["found"]));
+   }
+
+   if(data["data"] !== null && data["data"] !== undefined ) {
+      nrOfFields++;
+      const str = new Uint8Array(data["data"])
+      const lengthBytes = getAutoGrowLength(str.byteLength);
+      const f = makeField(str.byteLength + lengthBytes.byteLength, 1, 20);
+      new Uint8Array(f.buffer, f.byteOffset).set(new Uint8Array(lengthBytes), 0);
+      new Uint8Array(f.buffer, f.byteOffset).set(str, lengthBytes.byteLength);
+   }
+
+
+   const fieldsLength = fields.reduce((a, b) => b.byteLength + a, 0);
+
+
+   const result = new ArrayBuffer(fieldsLength + 2);
+   const resultC = new Uint8Array(result);
+   new DataView(result).setUint16(0, nrOfFields);
+
+   let offset = 2;
+   for (const buf of fields) {
+      resultC.set(new Uint8Array(buf), offset);
+      offset += buf.byteLength;
+   }
+
+   return new Uint8Array(result);
+}
+
+export function deserialize_PullObjectResponse (data: Uint8Array): PullObjectResponse {
+   const view = new DataView(data.buffer, data.byteOffset)
+   let idx = 0;
+   const readAutoGrowLength = () => {
+      let result = BigInt(0);
+      const v1 = view.getUint16(idx); idx += 2;
+      const u16_1 = v1 & 0x7fff;
+      result = result | (BigInt(u16_1) << BigInt(0));
+      if ((v1 & 0x8000) > 0) {
+         const v2 = view.getUint16(idx); idx += 2;
+         const u16_2 = v2 & 0x7fff;
+         result = result | (BigInt(u16_2) << BigInt(15));
+         if ((v2 & 0x8000) > 0) {
+            const v3 = view.getUint16(idx); idx += 2;
+            const u16_3 = v3 & 0x7fff;
+            result = result | (BigInt(u16_3) << BigInt(30));
+            if ((v3 & 0x8000) > 0) {
+               const v4 = view.getUint16(idx); idx += 2;
+               const u16_4 = v4;
+               result = result | (BigInt(u16_4) << BigInt(45));
+            }
+         }
+      }
+      return Number(result);
+   }
+   let result: any = {}
+   const nrOfFields = view.getUint16(idx); idx += 2;
+   for(let i = 0; i < nrOfFields; i++) {
+      const fieldLabel = view.getUint16(idx); idx += 2;
+      const fieldType = view.getUint8(idx); idx += 1;
+      switch(fieldLabel) {
+         case 0: {
+            result["found"] = view.getUint8(idx); idx += 1;
+            break;
+         }
+         case 1: {
+            const fieldDataLength = readAutoGrowLength()
+            const fieldDataUint8 = data.slice(idx, idx + fieldDataLength); idx += fieldDataLength;
+            result["data"] = fieldDataUint8;
+            break;
+         }
+         default:
+            throw new Error("Invalid label found: " + fieldLabel)
+            break;
+      }
+   }
+   return result;
+}

src/com/service_base.ts

@@ -0,0 +1,48 @@
+export type IStreamCallback<T> = (
+   msg: T | undefined,
+   error: Error | undefined,
+   end: boolean
+) => void;
+
+export interface IStream<T> {
+   subscribe(callback: IStreamCallback<T>): void;
+   close(): void;
+}
+
+export class Stream<T> implements IStream<T> {
+   buffer: [T | undefined, Error | undefined, boolean][] = [];
+   closed = false;
+   subscriber: IStreamCallback<T>[] = [];
+
+   subscribe(cb: IStreamCallback<T>) {
+      if (this.buffer.length > 0) {
+         this.buffer.forEach((e) => cb(...e));
+         this.buffer = [];
+      }
+      if (!this.closed) this.subscriber.push(cb);
+   }
+
+   send(msg: T) {
+      if (this.subscriber.length <= 0) {
+         this.buffer.push([msg, undefined, false]);
+      }
+
+      this.subscriber.forEach((s) => s(msg, undefined, false));
+   }
+
+   error(error: Error) {
+      if (this.subscriber.length <= 0) {
+         this.buffer.push([undefined, error, false]);
+      }
+      this.subscriber.forEach((s) => s(undefined, error, false));
+   }
+
+   close() {
+      this.closed = true;
+      if (this.subscriber.length <= 0) {
+         this.buffer.push([undefined, undefined, true]);
+      }
+      this.subscriber.forEach((s) => s(undefined, undefined, true));
+      this.subscriber = []; // Clear after close
+   }
+}

src/com/service_client.ts

@@ -0,0 +1,83 @@
+import ServiceMessage, { deserialize_ServiceMessage, serialize_ServiceMessage} from "./servicemessage";
+import { IStream, IStreamCallback, Stream } from "./service_base";
+
+
+
+
+export type { IStream, IStreamCallback };
+export { Stream };
+
+interface IServiceFunction {
+   istream: boolean;
+   input: (data: Uint8Array) => any;
+
+   rstream: boolean;
+   ret: (data: any) => Uint8Array;
+}
+
+export type IMessageCallback = (packet: Uint8Array) => void;
+
+export class Service {
+   public name: string = null as any;
+   protected functions = new Map<string, IServiceFunction>();
+
+   protected calls = new Map<string, (msg: ServiceMessage) => void>();
+
+   constructor(private provider: ServiceProvider, name: string) {
+      this.name = name;
+      this.provider.services.set(name, this);
+   }
+
+   onMessage(msg: ServiceMessage) {
+      const msgid = msg.id;
+      const call = this.calls.get(msgid);
+      if (call) {
+         call(msg);
+      }
+   }
+
+   protected sendMessage(msg: ServiceMessage) {
+      this.provider.sendMessage(msg);
+   }
+}
+
+export class ServiceProvider {
+   services = new Map<string, Service>();
+   constructor(private sendPacket: IMessageCallback) {}
+
+   onPacket(msg: Uint8Array) {
+      const decoded = deserialize_ServiceMessage(msg);
+      const serv = this.services.get(decoded.service);
+      if (serv) {
+         serv.onMessage(decoded);
+      }
+   }
+
+   sendMessage(msg: ServiceMessage) {
+      this.sendPacket(serialize_ServiceMessage(msg));
+   }
+}
+
+declare var require: any;
+export const getRandomBytes = (typeof self !== "undefined" &&
+   (self.crypto || (self as any).msCrypto)
+   ? function () {
+        // Browsers
+        var crypto = self.crypto || (self as any).msCrypto;
+        var QUOTA = 65536;
+        return function (n: number) {
+           var a = new Uint8Array(n);
+           for (var i = 0; i < n; i += QUOTA) {
+              crypto.getRandomValues(a.subarray(i, i + Math.min(n - i, QUOTA)));
+           }
+           return a;
+        };
+     }
+   : function () {
+        // Node
+        return require("crypto").randomBytes;
+     })() as (cnt: number) => Uint8Array;
+
+export const getRandomID = (length: number) => {
+   return btoa(String.fromCharCode.apply(null, getRandomBytes(length) as any));
+};

src/com/service_server.ts

@@ -0,0 +1,159 @@
+import ServiceMessage, { deserialize_ServiceMessage, serialize_ServiceMessage} from "./servicemessage";
+import { IStream, IStreamCallback, Stream } from "./service_base";
+
+
+
+
+export type { IStream, IStreamCallback };
+export { Stream };
+
+interface IServiceFunction {
+   istream: boolean;
+   input: (data: Uint8Array) => any;
+
+   rstream: boolean;
+   ret: (data: any) => Uint8Array;
+}
+
+export class Service<T> {
+   public name: string = null as any;
+   protected functions = new Map<string, IServiceFunction>();
+
+   constructor() {}
+
+   handleRequest(msg: ServiceMessage): IServiceFunction {
+      const fnc = this.functions.get(msg.function);
+      if (!fnc) throw new Error("Invalid function!");
+      return fnc;
+   }
+}
+
+type ISendMessageCB = (data: Uint8Array) => void;
+
+export class ServiceProvider<T = any> {
+   services = new Map<string, Service<T>>();
+   addService(service: Service<T>) {
+      this.services.set(service.name, service);
+   }
+
+   getSession(send: ISendMessageCB): Session<T> {
+      return new Session(this, send);
+   }
+}
+
+class Session<T> {
+   ctx: Partial<T> = {};
+
+   calls = new Map<
+      string,
+      {
+         def: IServiceFunction;
+         istream: Stream<any>;
+      }
+   >();
+   constructor(
+      private provider: ServiceProvider,
+      private send: ISendMessageCB
+   ) {}
+
+   async close() {
+      this.calls.forEach((call) => {
+         call.istream.close();
+         //TODO: Close rstreams or so...
+      });
+   }
+
+   async onMessage(data: Uint8Array) {
+      const msg = deserialize_ServiceMessage(data);
+      try {
+         if (this.calls.has(msg.id)) {
+            const call = this.calls.get(msg.id);
+            if (!call) throw new Error("This call does not exist anymore!");
+
+            if (!msg.payload) {
+               call.istream.close();
+            } else {
+               call.istream.send(call.def.input(msg.payload));
+            }
+         } else {
+            const service = this.provider.services.get(msg.service);
+            if (!service) throw new Error("Invalid Service!");
+
+            const functionDefinition = service.handleRequest(msg);
+            let input: any;
+            if (functionDefinition.istream) {
+               // Input is a stream
+               const istream = new Stream<any>();
+               input = istream;
+               this.calls.set(msg.id, {
+                  def: functionDefinition,
+                  istream,
+               });
+               if (msg.payload) {
+                  istream.send(functionDefinition.input(msg.payload));
+               } else {
+                  istream.close();
+               }
+            } else {
+               input = functionDefinition.input(msg.payload);
+            }
+
+            const result: any = await (service as any)[msg.function](
+               input,
+               this.ctx
+            );
+            if (functionDefinition.rstream) {
+               // Result is a stream
+               (result as IStream<any>).subscribe((value, error, end) => {
+                  if (!end) {
+                     this.send(
+                        serialize_ServiceMessage({
+                           id: msg.id,
+                           function: msg.function,
+                           service: msg.service,
+                           payload: error
+                              ? undefined
+                              : (functionDefinition.ret(value) as any),
+                           error: error?.message as any,
+                        })
+                     );
+                  } else {
+                     this.send(
+                        serialize_ServiceMessage({
+                           id: msg.id,
+                           function: msg.function,
+                           service: msg.service,
+                           payload: undefined as any,
+                           error: undefined as any,
+                        })
+                     );
+                  }
+               });
+            } else {
+               this.send(
+                  serialize_ServiceMessage({
+                     id: msg.id,
+                     function: msg.function,
+                     service: msg.service,
+                     payload: functionDefinition.ret(result),
+                     error: undefined as any,
+                  })
+               );
+            }
+         }
+      } catch (err) {
+         if (this.calls.has(msg.id)) {
+            this.calls.get(msg.id)?.istream.close();
+         }
+         this.send(
+            serialize_ServiceMessage({
+               id: msg.id,
+               function: msg.function,
+               service: msg.service,
+               payload: undefined as any,
+               error: err.message,
+            })
+         );
+      }
+   }
+}

src/com/servicemessage.ts

@@ -0,0 +1,182 @@
+export default interface ServiceMessage {
+   service: string;
+   function: string;
+   id: string;
+   payload: Uint8Array;
+   error: string;
+}
+export function serialize_ServiceMessage (data: ServiceMessage): Uint8Array {
+   let fields: ArrayBuffer[] = [];
+   const addBuffer = (buffer:ArrayBuffer) => fields.push(buffer);
+   const makeField = (payload_length: number, label: number, type: number) => {
+      let b = new ArrayBuffer(3 + payload_length);
+      new DataView(b).setUint16(0, label);
+      new DataView(b).setUint8(2, type);
+      fields.push(b);
+      return new DataView(b, 3);
+   }
+
+   const makeArrayBuffer = (payload_length: number) => {
+      let b = new ArrayBuffer(payload_length);
+      fields.push(b)
+      return new DataView(b)
+   }
+
+   const getAutoGrowLength = (length: number | bigint) => {
+      if (typeof length === "number") length = BigInt(length);
+      const lt1 = length >= BigInt(Math.pow(2, 15)) ? 0x8000 : 0;
+      const lt2 = length >= BigInt(Math.pow(2, 30)) ? 0x8000 : 0;
+      const lt3 = length >= BigInt(Math.pow(2, 45)) ? 0x8000 : 0;
+      const lt4 = length >= BigInt(Math.pow(2, 61));
+      if (lt4) throw new Error("Payload to large!");
+      let blen = BigInt(length);
+      const u16_1 = (Number(blen >> BigInt(0)) & 0x7fff) | lt1;
+      const u16_2 = (Number(blen >> BigInt(15)) & 0x7fff) | lt2;
+      const u16_3 = (Number(blen >> BigInt(30)) & 0x7fff) | lt3;
+      const u16_4 = Number(blen >> BigInt(45)) & 0xffff;
+      const ld: number[] = [u16_1];
+      if (lt1 != 0) ld.push(u16_2);
+      if (lt2 != 0) ld.push(u16_3);
+      if (lt3 != 0) ld.push(u16_4);
+      const dv = new DataView(new ArrayBuffer(ld.length * 2))
+      for(let i = 0; i < ld.length; i++) {
+      dv.setUint16(i * 2, ld[i])
+      }
+      return dv.buffer;
+   }
+
+   let nrOfFields = 0;
+   if(data["service"] !== null && data["service"] !== undefined ) {
+      nrOfFields++;
+      const str = new TextEncoder().encode(data["service"]);
+      const lengthBytes = getAutoGrowLength(str.byteLength);
+      const f = makeField(str.byteLength + lengthBytes.byteLength, 1, 21);
+      new Uint8Array(f.buffer, f.byteOffset).set(new Uint8Array(lengthBytes), 0);
+      new Uint8Array(f.buffer, f.byteOffset).set(str, lengthBytes.byteLength);
+   }
+
+   if(data["function"] !== null && data["function"] !== undefined ) {
+      nrOfFields++;
+      const str = new TextEncoder().encode(data["function"]);
+      const lengthBytes = getAutoGrowLength(str.byteLength);
+      const f = makeField(str.byteLength + lengthBytes.byteLength, 2, 21);
+      new Uint8Array(f.buffer, f.byteOffset).set(new Uint8Array(lengthBytes), 0);
+      new Uint8Array(f.buffer, f.byteOffset).set(str, lengthBytes.byteLength);
+   }
+
+   if(data["id"] !== null && data["id"] !== undefined ) {
+      nrOfFields++;
+      const str = new TextEncoder().encode(data["id"]);
+      const lengthBytes = getAutoGrowLength(str.byteLength);
+      const f = makeField(str.byteLength + lengthBytes.byteLength, 3, 21);
+      new Uint8Array(f.buffer, f.byteOffset).set(new Uint8Array(lengthBytes), 0);
+      new Uint8Array(f.buffer, f.byteOffset).set(str, lengthBytes.byteLength);
+   }
+
+   if(data["payload"] !== null && data["payload"] !== undefined ) {
+      nrOfFields++;
+      const str = new Uint8Array(data["payload"])
+      const lengthBytes = getAutoGrowLength(str.byteLength);
+      const f = makeField(str.byteLength + lengthBytes.byteLength, 4, 20);
+      new Uint8Array(f.buffer, f.byteOffset).set(new Uint8Array(lengthBytes), 0);
+      new Uint8Array(f.buffer, f.byteOffset).set(str, lengthBytes.byteLength);
+   }
+
+   if(data["error"] !== null && data["error"] !== undefined ) {
+      nrOfFields++;
+      const str = new TextEncoder().encode(data["error"]);
+      const lengthBytes = getAutoGrowLength(str.byteLength);
+      const f = makeField(str.byteLength + lengthBytes.byteLength, 5, 21);
+      new Uint8Array(f.buffer, f.byteOffset).set(new Uint8Array(lengthBytes), 0);
+      new Uint8Array(f.buffer, f.byteOffset).set(str, lengthBytes.byteLength);
+   }
+
+
+   const fieldsLength = fields.reduce((a, b) => b.byteLength + a, 0);
+
+
+   const result = new ArrayBuffer(fieldsLength + 2);
+   const resultC = new Uint8Array(result);
+   new DataView(result).setUint16(0, nrOfFields);
+
+   let offset = 2;
+   for (const buf of fields) {
+      resultC.set(new Uint8Array(buf), offset);
+      offset += buf.byteLength;
+   }
+
+   return new Uint8Array(result);
+}
+
+export function deserialize_ServiceMessage (data: Uint8Array): ServiceMessage {
+   const view = new DataView(data.buffer, data.byteOffset)
+   let idx = 0;
+   const readAutoGrowLength = () => {
+      let result = BigInt(0);
+      const v1 = view.getUint16(idx); idx += 2;
+      const u16_1 = v1 & 0x7fff;
+      result = result | (BigInt(u16_1) << BigInt(0));
+      if ((v1 & 0x8000) > 0) {
+         const v2 = view.getUint16(idx); idx += 2;
+         const u16_2 = v2 & 0x7fff;
+         result = result | (BigInt(u16_2) << BigInt(15));
+         if ((v2 & 0x8000) > 0) {
+            const v3 = view.getUint16(idx); idx += 2;
+            const u16_3 = v3 & 0x7fff;
+            result = result | (BigInt(u16_3) << BigInt(30));
+            if ((v3 & 0x8000) > 0) {
+               const v4 = view.getUint16(idx); idx += 2;
+               const u16_4 = v4;
+               result = result | (BigInt(u16_4) << BigInt(45));
+            }
+         }
+      }
+      return Number(result);
+   }
+   let result: any = {}
+   const nrOfFields = view.getUint16(idx); idx += 2;
+   for(let i = 0; i < nrOfFields; i++) {
+      const fieldLabel = view.getUint16(idx); idx += 2;
+      const fieldType = view.getUint8(idx); idx += 1;
+      switch(fieldLabel) {
+         case 1: {
+            const fieldDataLength = readAutoGrowLength()
+            const fieldDataUint8 = data.slice(idx, idx + fieldDataLength); idx += fieldDataLength;
+            const str = new TextDecoder().decode(fieldDataUint8);
+            result["service"] = str;
+            break;
+         }
+         case 2: {
+            const fieldDataLength = readAutoGrowLength()
+            const fieldDataUint8 = data.slice(idx, idx + fieldDataLength); idx += fieldDataLength;
+            const str = new TextDecoder().decode(fieldDataUint8);
+            result["function"] = str;
+            break;
+         }
+         case 3: {
+            const fieldDataLength = readAutoGrowLength()
+            const fieldDataUint8 = data.slice(idx, idx + fieldDataLength); idx += fieldDataLength;
+            const str = new TextDecoder().decode(fieldDataUint8);
+            result["id"] = str;
+            break;
+         }
+         case 4: {
+            const fieldDataLength = readAutoGrowLength()
+            const fieldDataUint8 = data.slice(idx, idx + fieldDataLength); idx += fieldDataLength;
+            result["payload"] = fieldDataUint8;
+            break;
+         }
+         case 5: {
+            const fieldDataLength = readAutoGrowLength()
+            const fieldDataUint8 = data.slice(idx, idx + fieldDataLength); idx += fieldDataLength;
+            const str = new TextDecoder().decode(fieldDataUint8);
+            result["error"] = str;
+            break;
+         }
+         default:
+            throw new Error("Invalid label found: " + fieldLabel)
+            break;
+      }
+   }
+   return result;
+}

src/com/sync_client.ts

@@ -0,0 +1,91 @@
+import SyncInitRequest, { serialize_SyncInitRequest, deserialize_SyncInitRequest} from "./syncinitrequest";
+import SyncInitResponse, { serialize_SyncInitResponse, deserialize_SyncInitResponse} from "./syncinitresponse";
+import PullGetLogRequest, { serialize_PullGetLogRequest, deserialize_PullGetLogRequest} from "./pullgetlogrequest";
+import PullGetLogResponse, { serialize_PullGetLogResponse, deserialize_PullGetLogResponse} from "./pullgetlogresponse";
+import PullObjectRequest, { serialize_PullObjectRequest, deserialize_PullObjectRequest} from "./pullobjectrequest";
+import PullObjectResponse, { serialize_PullObjectResponse, deserialize_PullObjectResponse} from "./pullobjectresponse";
+import ServiceMessage, { serialize_ServiceMessage, deserialize_ServiceMessage} from "./servicemessage";
+export type {
+   SyncInitRequest,
+   SyncInitResponse,
+   PullGetLogRequest,
+   PullGetLogResponse,
+   PullObjectRequest,
+   PullObjectResponse,
+   ServiceMessage,
+}
+import { IStream, Stream, Service, ServiceProvider, getRandomID } from "./service_client";
+export class Sync extends Service {
+   constructor(provider: ServiceProvider){
+      super(provider, "Sync");
+      this.functions.set("SyncInit", {
+         istream: false, input: deserialize_SyncInitRequest,
+         rstream: false, ret: serialize_SyncInitResponse
+      });
+      this.functions.set("PullGetLog", {
+         istream: false, input: deserialize_PullGetLogRequest,
+         rstream: false, ret: serialize_PullGetLogResponse
+      });
+      this.functions.set("PullObject", {
+         istream: false, input: deserialize_PullObjectRequest,
+         rstream: false, ret: serialize_PullObjectResponse
+      });
+   }
+
+   SyncInit(data: SyncInitRequest): Promise<SyncInitResponse> {
+      const msgid = getRandomID(16);
+      return new Promise((resolve, reject)=>{
+         this.calls.set(msgid, (msg)=>{
+            this.calls.delete(msgid);
+            if(msg.error) reject(new Error(msg.error))
+            else resolve(deserialize_SyncInitResponse(msg.payload))
+         })
+         this.sendMessage({
+            service: "Sync",
+            function: "SyncInit",
+            id: msgid,
+            payload: (serialize_SyncInitRequest(data)) as any,
+            error: undefined as any
+         });
+      })
+      
+   }
+
+   PullGetLog(data: PullGetLogRequest): Promise<PullGetLogResponse> {
+      const msgid = getRandomID(16);
+      return new Promise((resolve, reject)=>{
+         this.calls.set(msgid, (msg)=>{
+            this.calls.delete(msgid);
+            if(msg.error) reject(new Error(msg.error))
+            else resolve(deserialize_PullGetLogResponse(msg.payload))
+         })
+         this.sendMessage({
+            service: "Sync",
+            function: "PullGetLog",
+            id: msgid,
+            payload: (serialize_PullGetLogRequest(data)) as any,
+            error: undefined as any
+         });
+      })
+      
+   }
+
+   PullObject(data: PullObjectRequest): Promise<PullObjectResponse> {
+      const msgid = getRandomID(16);
+      return new Promise((resolve, reject)=>{
+         this.calls.set(msgid, (msg)=>{
+            this.calls.delete(msgid);
+            if(msg.error) reject(new Error(msg.error))
+            else resolve(deserialize_PullObjectResponse(msg.payload))
+         })
+         this.sendMessage({
+            service: "Sync",
+            function: "PullObject",
+            id: msgid,
+            payload: (serialize_PullObjectRequest(data)) as any,
+            error: undefined as any
+         });
+      })
+      
+   }
+}

src/com/sync_server.ts

@@ -0,0 +1,41 @@
+import SyncInitRequest, { serialize_SyncInitRequest, deserialize_SyncInitRequest} from "./syncinitrequest";
+import SyncInitResponse, { serialize_SyncInitResponse, deserialize_SyncInitResponse} from "./syncinitresponse";
+import PullGetLogRequest, { serialize_PullGetLogRequest, deserialize_PullGetLogRequest} from "./pullgetlogrequest";
+import PullGetLogResponse, { serialize_PullGetLogResponse, deserialize_PullGetLogResponse} from "./pullgetlogresponse";
+import PullObjectRequest, { serialize_PullObjectRequest, deserialize_PullObjectRequest} from "./pullobjectrequest";
+import PullObjectResponse, { serialize_PullObjectResponse, deserialize_PullObjectResponse} from "./pullobjectresponse";
+import ServiceMessage, { serialize_ServiceMessage, deserialize_ServiceMessage} from "./servicemessage";
+export type {
+   SyncInitRequest,
+   SyncInitResponse,
+   PullGetLogRequest,
+   PullGetLogResponse,
+   PullObjectRequest,
+   PullObjectResponse,
+   ServiceMessage,
+}
+import { IStream, Service } from "./service_server";
+export abstract class Sync<T> extends Service<T> {
+   public name = "Sync";
+   constructor(){
+      super();
+      this.functions.set("SyncInit", {
+         istream: false, input: deserialize_SyncInitRequest,
+         rstream: false, ret: serialize_SyncInitResponse
+      });
+      this.functions.set("PullGetLog", {
+         istream: false, input: deserialize_PullGetLogRequest,
+         rstream: false, ret: serialize_PullGetLogResponse
+      });
+      this.functions.set("PullObject", {
+         istream: false, input: deserialize_PullObjectRequest,
+         rstream: false, ret: serialize_PullObjectResponse
+      });
+   }
+
+   abstract SyncInit(data: SyncInitRequest, ctx: T): Promise<SyncInitResponse>;
+
+   abstract PullGetLog(data: PullGetLogRequest, ctx: T): Promise<PullGetLogResponse>;
+
+   abstract PullObject(data: PullObjectRequest, ctx: T): Promise<PullObjectResponse>;
+}

src/com/syncinitrequest.ts

@@ -0,0 +1,115 @@
+export default interface SyncInitRequest {
+   clientCommit: string;
+}
+export function serialize_SyncInitRequest (data: SyncInitRequest): Uint8Array {
+   let fields: ArrayBuffer[] = [];
+   const addBuffer = (buffer:ArrayBuffer) => fields.push(buffer);
+   const makeField = (payload_length: number, label: number, type: number) => {
+      let b = new ArrayBuffer(3 + payload_length);
+      new DataView(b).setUint16(0, label);
+      new DataView(b).setUint8(2, type);
+      fields.push(b);
+      return new DataView(b, 3);
+   }
+
+   const makeArrayBuffer = (payload_length: number) => {
+      let b = new ArrayBuffer(payload_length);
+      fields.push(b)
+      return new DataView(b)
+   }
+
+   const getAutoGrowLength = (length: number | bigint) => {
+      if (typeof length === "number") length = BigInt(length);
+      const lt1 = length >= BigInt(Math.pow(2, 15)) ? 0x8000 : 0;
+      const lt2 = length >= BigInt(Math.pow(2, 30)) ? 0x8000 : 0;
+      const lt3 = length >= BigInt(Math.pow(2, 45)) ? 0x8000 : 0;
+      const lt4 = length >= BigInt(Math.pow(2, 61));
+      if (lt4) throw new Error("Payload to large!");
+      let blen = BigInt(length);
+      const u16_1 = (Number(blen >> BigInt(0)) & 0x7fff) | lt1;
+      const u16_2 = (Number(blen >> BigInt(15)) & 0x7fff) | lt2;
+      const u16_3 = (Number(blen >> BigInt(30)) & 0x7fff) | lt3;
+      const u16_4 = Number(blen >> BigInt(45)) & 0xffff;
+      const ld: number[] = [u16_1];
+      if (lt1 != 0) ld.push(u16_2);
+      if (lt2 != 0) ld.push(u16_3);
+      if (lt3 != 0) ld.push(u16_4);
+      const dv = new DataView(new ArrayBuffer(ld.length * 2))
+      for(let i = 0; i < ld.length; i++) {
+      dv.setUint16(i * 2, ld[i])
+      }
+      return dv.buffer;
+   }
+
+   let nrOfFields = 0;
+   if(data["clientCommit"] !== null && data["clientCommit"] !== undefined ) {
+      nrOfFields++;
+      const str = new TextEncoder().encode(data["clientCommit"]);
+      const lengthBytes = getAutoGrowLength(str.byteLength);
+      const f = makeField(str.byteLength + lengthBytes.byteLength, 0, 21);
+      new Uint8Array(f.buffer, f.byteOffset).set(new Uint8Array(lengthBytes), 0);
+      new Uint8Array(f.buffer, f.byteOffset).set(str, lengthBytes.byteLength);
+   }
+
+
+   const fieldsLength = fields.reduce((a, b) => b.byteLength + a, 0);
+
+
+   const result = new ArrayBuffer(fieldsLength + 2);
+   const resultC = new Uint8Array(result);
+   new DataView(result).setUint16(0, nrOfFields);
+
+   let offset = 2;
+   for (const buf of fields) {
+      resultC.set(new Uint8Array(buf), offset);
+      offset += buf.byteLength;
+   }
+
+   return new Uint8Array(result);
+}
+
+export function deserialize_SyncInitRequest (data: Uint8Array): SyncInitRequest {
+   const view = new DataView(data.buffer, data.byteOffset)
+   let idx = 0;
+   const readAutoGrowLength = () => {
+      let result = BigInt(0);
+      const v1 = view.getUint16(idx); idx += 2;
+      const u16_1 = v1 & 0x7fff;
+      result = result | (BigInt(u16_1) << BigInt(0));
+      if ((v1 & 0x8000) > 0) {
+         const v2 = view.getUint16(idx); idx += 2;
+         const u16_2 = v2 & 0x7fff;
+         result = result | (BigInt(u16_2) << BigInt(15));
+         if ((v2 & 0x8000) > 0) {
+            const v3 = view.getUint16(idx); idx += 2;
+            const u16_3 = v3 & 0x7fff;
+            result = result | (BigInt(u16_3) << BigInt(30));
+            if ((v3 & 0x8000) > 0) {
+               const v4 = view.getUint16(idx); idx += 2;
+               const u16_4 = v4;
+               result = result | (BigInt(u16_4) << BigInt(45));
+            }
+         }
+      }
+      return Number(result);
+   }
+   let result: any = {}
+   const nrOfFields = view.getUint16(idx); idx += 2;
+   for(let i = 0; i < nrOfFields; i++) {
+      const fieldLabel = view.getUint16(idx); idx += 2;
+      const fieldType = view.getUint8(idx); idx += 1;
+      switch(fieldLabel) {
+         case 0: {
+            const fieldDataLength = readAutoGrowLength()
+            const fieldDataUint8 = data.slice(idx, idx + fieldDataLength); idx += fieldDataLength;
+            const str = new TextDecoder().decode(fieldDataUint8);
+            result["clientCommit"] = str;
+            break;
+         }
+         default:
+            throw new Error("Invalid label found: " + fieldLabel)
+            break;
+      }
+   }
+   return result;
+}

src/com/syncinitresponse.ts

@@ -0,0 +1,137 @@
+export default interface SyncInitResponse {
+   remoteCommit: string;
+   needPull: boolean;
+   needPush: boolean;
+}
+export function serialize_SyncInitResponse (data: SyncInitResponse): Uint8Array {
+   let fields: ArrayBuffer[] = [];
+   const addBuffer = (buffer:ArrayBuffer) => fields.push(buffer);
+   const makeField = (payload_length: number, label: number, type: number) => {
+      let b = new ArrayBuffer(3 + payload_length);
+      new DataView(b).setUint16(0, label);
+      new DataView(b).setUint8(2, type);
+      fields.push(b);
+      return new DataView(b, 3);
+   }
+
+   const makeArrayBuffer = (payload_length: number) => {
+      let b = new ArrayBuffer(payload_length);
+      fields.push(b)
+      return new DataView(b)
+   }
+
+   const getAutoGrowLength = (length: number | bigint) => {
+      if (typeof length === "number") length = BigInt(length);
+      const lt1 = length >= BigInt(Math.pow(2, 15)) ? 0x8000 : 0;
+      const lt2 = length >= BigInt(Math.pow(2, 30)) ? 0x8000 : 0;
+      const lt3 = length >= BigInt(Math.pow(2, 45)) ? 0x8000 : 0;
+      const lt4 = length >= BigInt(Math.pow(2, 61));
+      if (lt4) throw new Error("Payload to large!");
+      let blen = BigInt(length);
+      const u16_1 = (Number(blen >> BigInt(0)) & 0x7fff) | lt1;
+      const u16_2 = (Number(blen >> BigInt(15)) & 0x7fff) | lt2;
+      const u16_3 = (Number(blen >> BigInt(30)) & 0x7fff) | lt3;
+      const u16_4 = Number(blen >> BigInt(45)) & 0xffff;
+      const ld: number[] = [u16_1];
+      if (lt1 != 0) ld.push(u16_2);
+      if (lt2 != 0) ld.push(u16_3);
+      if (lt3 != 0) ld.push(u16_4);
+      const dv = new DataView(new ArrayBuffer(ld.length * 2))
+      for(let i = 0; i < ld.length; i++) {
+      dv.setUint16(i * 2, ld[i])
+      }
+      return dv.buffer;
+   }
+
+   let nrOfFields = 0;
+   if(data["remoteCommit"] !== null && data["remoteCommit"] !== undefined ) {
+      nrOfFields++;
+      const str = new TextEncoder().encode(data["remoteCommit"]);
+      const lengthBytes = getAutoGrowLength(str.byteLength);
+      const f = makeField(str.byteLength + lengthBytes.byteLength, 0, 21);
+      new Uint8Array(f.buffer, f.byteOffset).set(new Uint8Array(lengthBytes), 0);
+      new Uint8Array(f.buffer, f.byteOffset).set(str, lengthBytes.byteLength);
+   }
+
+   if(data["needPull"] !== null && data["needPull"] !== undefined ) {
+      nrOfFields++;
+      const f = makeField(1, 1, 5);
+      f.setUint8(0, Number(data["needPull"]));
+   }
+
+   if(data["needPush"] !== null && data["needPush"] !== undefined ) {
+      nrOfFields++;
+      const f = makeField(1, 2, 5);
+      f.setUint8(0, Number(data["needPush"]));
+   }
+
+
+   const fieldsLength = fields.reduce((a, b) => b.byteLength + a, 0);
+
+
+   const result = new ArrayBuffer(fieldsLength + 2);
+   const resultC = new Uint8Array(result);
+   new DataView(result).setUint16(0, nrOfFields);
+
+   let offset = 2;
+   for (const buf of fields) {
+      resultC.set(new Uint8Array(buf), offset);
+      offset += buf.byteLength;
+   }
+
+   return new Uint8Array(result);
+}
+
+export function deserialize_SyncInitResponse (data: Uint8Array): SyncInitResponse {
+   const view = new DataView(data.buffer, data.byteOffset)
+   let idx = 0;
+   const readAutoGrowLength = () => {
+      let result = BigInt(0);
+      const v1 = view.getUint16(idx); idx += 2;
+      const u16_1 = v1 & 0x7fff;
+      result = result | (BigInt(u16_1) << BigInt(0));
+      if ((v1 & 0x8000) > 0) {
+         const v2 = view.getUint16(idx); idx += 2;
+         const u16_2 = v2 & 0x7fff;
+         result = result | (BigInt(u16_2) << BigInt(15));
+         if ((v2 & 0x8000) > 0) {
+            const v3 = view.getUint16(idx); idx += 2;
+            const u16_3 = v3 & 0x7fff;
+            result = result | (BigInt(u16_3) << BigInt(30));
+            if ((v3 & 0x8000) > 0) {
+               const v4 = view.getUint16(idx); idx += 2;
+               const u16_4 = v4;
+               result = result | (BigInt(u16_4) << BigInt(45));
+            }
+         }
+      }
+      return Number(result);
+   }
+   let result: any = {}
+   const nrOfFields = view.getUint16(idx); idx += 2;
+   for(let i = 0; i < nrOfFields; i++) {
+      const fieldLabel = view.getUint16(idx); idx += 2;
+      const fieldType = view.getUint8(idx); idx += 1;
+      switch(fieldLabel) {
+         case 0: {
+            const fieldDataLength = readAutoGrowLength()
+            const fieldDataUint8 = data.slice(idx, idx + fieldDataLength); idx += fieldDataLength;
+            const str = new TextDecoder().decode(fieldDataUint8);
+            result["remoteCommit"] = str;
+            break;
+         }
+         case 1: {
+            result["needPull"] = view.getUint8(idx); idx += 1;
+            break;
+         }
+         case 2: {
+            result["needPush"] = view.getUint8(idx); idx += 1;
+            break;
+         }
+         default:
+            throw new Error("Invalid label found: " + fieldLabel)
+            break;
+      }
+   }
+   return result;
+}

src/repo.ts

@@ -19,6 +19,7 @@ export type Commit = {
    id: string;
    root: string;
    before: string;
+   merge: string;
    date: Date;
 };
 
@@ -30,12 +31,25 @@ export type NodeLog = {
    commit: Commit
 }
 
+export type ISyncTransferStream = {
+   on(type: "data", func: (data: Uint8Array) => void): void;
+   send(data: Uint8Array): void;
+}
+
 // TODOs:
 //  - HEAD locks
 //  - HEAD/Tree Cache
 //  - Remote synchronisation
 //  - Add DataStore Locking for access from multiple sources
 
+export const ObjectTypes = {
+   blob: new Uint8Array([98, 108, 111, 98, 10]),
+   tree: new Uint8Array([116, 114, 101, 101, 10]),
+   comm: new Uint8Array([99, 111, 109, 109, 10]),
+}
+
+export type ObjectTypeNames = keyof typeof ObjectTypes;
+
 export default class Repository {
    //#region local variables
    #store: IDataStore;
@@ -65,30 +79,6 @@ export default class Repository {
       return resolved.split(Path.sep);
    }
 
-   private async writeObject(data: Uint8Array | string): Promise<string> {
-      if (typeof data == "string") {
-         data = new TextEncoder().encode(data);
-      }
-      const objectID = this.sha1(data);
-      await this.#store.set("objects/" + objectID, data);
-      return objectID;
-   }
-
-   private async hasObject(id: string): Promise<boolean> {
-      return this.#store.has("objects/" + id);
-   }
-
-   private async readObject(id: string, string: true): Promise<string | undefined>;
-   private async readObject(id: string, string?: false): Promise<Uint8Array | undefined>;
-   private async readObject(id: string, string = false): Promise<Uint8Array | string | undefined> {
-      let data = await this.#store.get("objects/" + id);
-      if (string) {
-         return new TextDecoder().decode(data);
-      } else {
-         return data;
-      }
-   }
-
    private async treeFindObjectID(
       treeID: string,
       parts: string[],
@@ -118,7 +108,106 @@ export default class Repository {
    private async readTree(id: string): Promise<TreeEntry[]> {
       const tree = await this.readObject(id, true);
       if (tree == undefined) throw new Error("Invalid treeID");
-      return tree.split("\n").filter(e => e !== "").map((e) => {
+      return this.parseTree(tree);
+   }
+
+   private async makeCommit(treeID: string, old?: Commit, merge?: Commit) {
+      if (!old) {
+         // Could be called once more than necessary, if no HEAD exists.
+         old = await this.readHead();
+      }
+      let commitStr =
+         `tree ${treeID}\ndate ${new Date().toISOString()}\n`;
+      if (old) {
+         commitStr += `before ${old?.id}\n`;
+         if (merge) {
+            commitStr += `merge ${old?.id}\n`;
+         }
+      }
+
+      return await this.writeObject(commitStr, "comm");
+   }
+
+
+   //#endregion
+
+
+   //#region public
+   async clean() {
+      // TODO: Cleanup broken things
+   }
+
+   async writeHead(commitID: string): Promise<void> {
+      await this.#store.set("HEAD", new TextEncoder().encode(commitID));
+   }
+
+   public async writeObject(data: Uint8Array | string, type: ObjectTypeNames): Promise<string> {
+      if (typeof data == "string") {
+         data = new TextEncoder().encode(data);
+      }
+      const objectID = this.sha1(data);
+
+      let merged = new Uint8Array(5 + data.length);
+      merged.set(ObjectTypes[type], 0)
+      merged.set(data, 5);
+
+      await this.#store.set("objects/" + objectID, merged);
+      return objectID;
+   }
+
+   public async hasObject(id: string): Promise<boolean> {
+      return this.#store.has("objects/" + id);
+   }
+
+   public async readObjectRaw(id: string) {
+      return await this.#store.get("objects/" + id);
+   }
+
+   public async readObjectTyped(id: String) {
+      let data = await this.#store.get("objects/" + id);
+      if (!data)
+         return undefined;
+
+      let type = new TextDecoder().decode(data.slice(0, 4))
+      return {
+         type: type as ObjectTypeNames,
+         data: data.slice(5)
+      }
+   }
+
+   public async readObject(id: string, string: true): Promise<string | undefined>;
+   public async readObject(id: string, string?: false): Promise<Uint8Array | undefined>;
+   public async readObject(id: string, string = false): Promise<Uint8Array | string | undefined> {
+      const res = await this.readObjectTyped(id);
+      if (!res)
+         return undefined;
+
+      const { data } = res;
+
+      if (string) {
+         return new TextDecoder().decode(data);
+      } else {
+         return data;
+      }
+   }
+
+   public async readObjectType(id: string): Promise<ObjectTypeNames | undefined> {
+      const res = await this.readObjectTyped(id);
+      if (!res)
+         return undefined;
+
+      return res.type;
+   }
+
+   async hasCommit(id: string) {
+      let type = await this.readObjectType(id)
+      return type == "comm";
+   }
+
+   parseTree(treeStr: string | Uint8Array): TreeEntry[] {
+      if (typeof treeStr !== "string")
+         treeStr = new TextDecoder().decode(treeStr);
+      return treeStr.split("\n").filter(e => e !== "").map((e) => {
          const entry = e.split(" ") as TreeEntry;
          const [type] = entry;
 
@@ -134,21 +223,9 @@ export default class Repository {
       });
    }
 
-   private async makeCommit(treeID: string, old?: Commit) {
+   parseCommit(id: string, commitStr: string | Uint8Array,) {
-      if (!old) {
+      if (typeof commitStr !== "string")
-         // Could be called once more than necessary, if no HEAD exists.
+         commitStr = new TextDecoder().decode(commitStr);
-         old = await this.readHead();
-      }
-      const commitStr =
-         `tree ${treeID}\ndate ${new Date().toISOString()}\n` + (old ? `before ${old?.id}\n` : "");
-
-      return await this.writeObject(commitStr);
-   }
-
-   private async readCommit(id: string): Promise<Commit> {
-      const commitStr = await this.readObject(id, true);
-      if (!commitStr)
-         throw new Error(`Commit with id ${id} not found!`);
 
       let commit: Commit = { id } as any;
       for (const entry of commitStr.split("\n")) {
@@ -161,12 +238,25 @@ export default class Repository {
             case "before": // TODO: Simple validity checks
                commit.before = value;
                break;
+            case "merge": // TODO: Simple validity checks
+               commit.merge = value;
+               break;
             case "date":
                commit.date = new Date(value);
                break;
          }
       }
 
+      return commit;
+   }
+
+   async readCommit(id: string): Promise<Commit> {
+      const commitStr = await this.readObject(id, true);
+      if (!commitStr)
+         throw new Error(`Commit with id ${id} not found!`);
+
+      let commit = this.parseCommit(id, commitStr);
+
       if (!commit.root) {
          throw new Error("No tree defined in this commit!");
       }
@@ -174,23 +264,35 @@ export default class Repository {
       return commit;
    }
 
-   private async readHead(): Promise<Commit | undefined> {
+   async readHead(): Promise<Commit | undefined> {
       if (!(await this.#store.has("HEAD"))) return undefined;
       const head = new TextDecoder().decode(await this.#store.get("HEAD"));
 
       return this.readCommit(head);
    }
 
-   private async writeHead(commitID: string): Promise<void> {
+   async mergeCommits(commit1: string, commit2: string): Promise<string> {
-      await this.#store.set("HEAD", new TextEncoder().encode(commitID));
+      throw new Error("WIP");
+      // let newCommit = this.makeCommit()
+
    }
 
-   //#endregion
+   async readCommitLog(till?: string, merges?: boolean): Promise<Commit[]> {
+      let head = await this.readHead();
+      if (!head)
+         return [];
 
+      let log: Commit[] = [head];
 
-   //#region public
+      let current = head;
-   async clean() {
+      while (current.before || (till && current.id == till)) {
-      // TODO: Cleanup broken things
+         current = await this.readCommit(current.before);
+         if (!current)
+            throw new Error("Repository sems damaged! Can't read commit!");
+         log.push(current)
+      }
+
+      return log;
    }
 
    async readdir(path: string): Promise<TreeEntry[]> {
@@ -221,7 +323,7 @@ export default class Repository {
       return this.readObject(id);
    }
 
-   async log(path: string): Promise<any[]> {
+   async fileLog(path: string): Promise<any[]> {
       const parts = this.splitPath(path);
       const head = await this.readHead();
       if (!head) return [];
@@ -269,7 +371,7 @@ export default class Repository {
 
       let objectID: string | undefined = undefined;
       if (data) {
-         objectID = await this.writeObject(data);
+         objectID = await this.writeObject(data, "blob");
       }
 
       const lock = await this.#store.getLock();
@@ -323,7 +425,7 @@ export default class Repository {
             if (tree.length > 0) {
                let treeString = tree.map(([type, hash, name]) => `${type} ${hash} ${name}`).join("\n");
 
-               let newTreeID = await this.writeObject(treeString);
+               let newTreeID = await this.writeObject(treeString, "tree");
 
                return newTreeID;
             } else {
@@ -333,7 +435,7 @@ export default class Repository {
 
          let newTree = await makeTree(head?.root, parts);
          if (!newTree) { //TODO: Is this what i want?
-            newTree = await this.writeObject("");
+            newTree = await this.writeObject("", "tree");
          }
          let commit = await this.makeCommit(newTree, head);
          await this.writeHead(commit);
@@ -347,4 +449,4 @@ export default class Repository {
    }
 
    //#endregion
-}
+}

src/sync.ts

@@ -0,0 +1,289 @@
+
+import RemoteCommit from "./com/commit";
+import PullGetLogRequest from "./com/pullgetlogrequest";
+import PullGetLogResponse from "./com/pullgetlogresponse";
+import { ServiceProvider as ServiceProviderClient } from "./com/service_client";
+import { ServiceProvider as ServiceProviderServer } from "./com/service_server";
+import { PullObjectRequest, PullObjectResponse, Sync as SyncClient, SyncInitRequest, SyncInitResponse } from "./com/sync_client";
+import { Sync as SyncServer } from "./com/sync_server";
+import Repository from "./repo";
+
+if (typeof btoa === 'undefined') {
+   global.btoa = function (str) {
+      return Buffer.from(str, 'binary').toString('base64');
+   };
+}
+
+if (typeof atob === 'undefined') {
+   global.atob = function (b64Encoded) {
+      return Buffer.from(b64Encoded, 'base64').toString('binary');
+   };
+}
+
+export interface ISimpleStream {
+   on(type: "data", cb: (data: Uint8Array) => void): void;
+   on(type: "close", cb: () => void): void;
+   close(): void;
+   send(data: Uint8Array): void;
+}
+
+export function getCopyStreams(): [ISimpleStream, ISimpleStream] {
+   let cb1d: any = undefined;
+   let cb1c: any = undefined;
+
+   let cb2d: any = undefined;
+   let cb2c: any = undefined;
+
+   let s1: ISimpleStream = {
+      on: (type, cb) => {
+         if (type == "data") {
+            cb1d = cb;
+         } else if (type == "close") {
+            cb1c = cb;
+         }
+      },
+      close: () => {
+         if (cb2c)
+            cb2c();
+      },
+      send: data => {
+         if (cb2d)
+            cb2d(data);
+      }
+   }
+
+   let s2: ISimpleStream = {
+      on: (type, cb) => {
+         if (type == "data") {
+            cb2d = cb;
+         } else if (type == "close") {
+            cb2c = cb;
+         }
+      },
+      close: () => {
+         if (cb2c)
+            cb1c();
+      },
+      send: data => {
+         if (cb1d)
+            cb1d(data);
+      }
+   }
+
+   return [s1, s2];
+}
+
+
+export async function startSyncClient(stream: ISimpleStream, repo: Repository) {
+   const prov = new ServiceProviderClient(stream.send.bind(stream));
+   stream.on("data", chunk => prov.onPacket(chunk));
+
+   stream.on("close", () => { }) //TODO: Implement
+
+   const service = new SyncClient(prov);
+   let head = await repo.readHead();
+   let remoteContainsHead = false;
+
+   let response = await service.SyncInit({
+      clientCommit: head?.id as string
+   })
+
+   if (response.needPull) {
+      let commitsToDownload = new Set<string>();
+      let toAnalyse: string[] = [response.remoteCommit];
+      while (toAnalyse.length > 0) {
+         let current = toAnalyse.pop() as string;
+
+         let resp = await service.PullGetLog({
+            limit: 20,
+            start: current
+         });
+
+         for (const commit of resp.commits) {
+            if (head && commit.id == head.id) {
+               remoteContainsHead = true;
+            }
+            if (!await repo.hasCommit(commit.id)) {
+               commitsToDownload.add(commit.id);
+               if (commit.merge && !await repo.hasCommit(commit.merge)) {
+                  commitsToDownload.add(commit.merge);
+                  toAnalyse.push(commit.merge);
+               }
+            }
+         }
+
+         let last = resp.commits[resp.commits.length - 1];
+         if (last && last.before) {
+            toAnalyse.push(last.before);
+         }
+      }
+
+      const downloadTree = async (treeID: string) => {
+         let treeData = await service.PullObject({ id: treeID, type: "tree" });
+         if (!treeData.found)
+            throw new Error(`Tree with id ${treeID} not found!`);
+
+         let tree = repo.parseTree(treeData.data);
+         for (const [type, objID, name] of tree) {
+            if (!await repo.hasObject(objID)) {
+               if (type == "tree") {
+                  await downloadTree(objID);
+               }
+
+               let res = await service.PullObject({
+                  id: objID,
+                  type
+               });
+
+               if (!res.found)
+                  throw new Error(`Could not find Object with id ${objID} on remote`);
+
+               repo.writeObject(res.data, type);
+            }
+         }
+      }
+
+      for (const commitID of commitsToDownload) {
+         let commitData = await service.PullObject({ id: commitID, type: "comm" });
+         if (!commitData.found)
+            throw new Error(`Commit with id ${commitID} not on server!`);
+
+         let commit = repo.parseCommit(commitID, commitData.data);
+
+         if (!await repo.hasObject(commit.root)) {
+            await downloadTree(commit.root);
+            let res = await service.PullObject({
+               id: commit.root,
+               type: "tree"
+            });
+
+            if (!res.found)
+               throw new Error(`Could not find Object with id ${commit.root} on remote`);
+
+            repo.writeObject(res.data, "tree");
+         }
+
+         repo.writeObject(commitData.data, "comm");
+      }
+
+      if (head) {
+         if (remoteContainsHead) {
+            await repo.writeHead(response.remoteCommit);
+         } else {
+            let commit = await repo.mergeCommits(head.id, response.remoteCommit);
+            await repo.writeHead(commit);
+         }
+      } else if (response.remoteCommit) {
+         await repo.writeHead(response.remoteCommit);
+      }
+   }
+
+   if (response.needPush) {
+      //TODO: Push
+   }
+
+
+   return stream.close();
+}
+
+class SyncRemote extends SyncServer<never> {
+   repo: Repository;
+   constructor(repo: Repository) {
+      super();
+      this.repo = repo;
+   }
+
+   async PullGetLog({ limit, start }: PullGetLogRequest): Promise<PullGetLogResponse> {
+      let log = await this.repo.readCommitLog();
+      let startIdx = 0;
+      if (start) {
+         startIdx = log.findIndex(e => e.id == start);
+         if (startIdx < 0) {
+            throw new Error("Invalid start commit ID!");
+         }
+      }
+
+      return {
+         commits: log.slice(startIdx, startIdx + limit).map(({ id, root, before, merge, date, }) => ({ id, root, before, merge, date: date.valueOf() }))
+      }
+   }
+
+   async PullObject({ id, type }: PullObjectRequest): Promise<PullObjectResponse> {
+      let res = await this.repo.readObjectTyped(id);
+
+      if (!res || res.type !== type) {
+         return {
+            found: false,
+            data: undefined as any
+         }
+      } else {
+         return {
+            found: true,
+            data: res.data
+         }
+      }
+   }
+
+   async SyncInit({ clientCommit }: SyncInitRequest): Promise<SyncInitResponse> {
+      let head = await this.repo.readHead();
+      if (!head) {
+         if (!clientCommit) {
+            return {
+               needPull: false,
+               needPush: false,
+               remoteCommit: undefined as never as string
+            };
+         } else {
+            return {
+               needPull: false,
+               needPush: true,
+               remoteCommit: undefined as never as string
+            }
+         }
+      } else {
+         if (head.id == clientCommit) {
+            return {
+               needPull: false,
+               needPush: false,
+               remoteCommit: head.id
+            };
+         } else {
+            if (!clientCommit) {
+               return {
+                  needPull: true,
+                  needPush: false,
+                  remoteCommit: head.id
+               };
+            } else {
+               let log = await this.repo.readCommitLog(clientCommit);
+               if (log[log.length - 1].id == clientCommit) {
+                  return {
+                     needPull: true,
+                     needPush: false,
+                     remoteCommit: head.id
+                  };
+               } else {
+                  return {
+                     needPull: true, // More a could need pull
+                     needPush: true,
+                     remoteCommit: head.id
+                  };
+               }
+            }
+         }
+      }
+   }
+
+
+}
+
+export async function startSyncRemote(stream: ISimpleStream, repo: Repository) {
+   return new Promise<void>((yes, no) => {
+      const prov = new ServiceProviderServer();
+      prov.addService(new SyncRemote(repo));
+      const sess = prov.getSession(stream.send.bind(stream));
+      stream.on("data", (data) => sess.onMessage(data).catch(no));
+      stream.on("close", () => { sess.close(); yes() });
+
+   })
+}

src/test.ts

@@ -2,7 +2,7 @@ import Repository, { IDataStore } from "./repo";
 import FSDataStore from "./datasources/fs";
 import * as Fs from "fs";
 import { expect } from "chai";
-import * as Crypto from "crypto";
+import { getCopyStreams, startSyncClient, startSyncRemote } from "./sync";
 
 const t = (t: string) => new TextEncoder().encode(t);
 const td = (t: Uint8Array | undefined) => new TextDecoder().decode(t);
@@ -157,8 +157,43 @@ describe("Basic Repo functions", () => {
       await repo.write("test", t(testData + 3));
       await repo.write("test", t(testData + 4));
 
-      const res = await repo.log("test");
+      const res = await repo.fileLog("test");
       expect(res).to.not.be.undefined;
       expect(res.length).to.equal(5);
    })
-})
+})
+
+describe("Basic Repo functions", () => {
+   let ds1: IDataStore = new FSDataStore(repoPath + "_1");
+   let ds2: IDataStore = new FSDataStore(repoPath + "_2");
+   beforeEach(async () => {
+      await Fs.promises.rm(repoPath + "_1", { recursive: true, force: true });
+      await Fs.promises.rm(repoPath + "_2", { recursive: true, force: true });
+      ds1 = new FSDataStore(repoPath + "_1");
+      ds2 = new FSDataStore(repoPath + "_2");
+   })
+
+   it("should sync two repositories using only pull", async () => {
+      let repo1 = new Repository(ds1);
+      let repo2 = new Repository(ds2);
+
+      await repo1.write("hi", t("Hello"));
+      expect((await repo1.readdir("/")).length).to.equal(1);
+      expect((await repo2.readdir("/")).length).to.equal(0);
+      expect(td(await repo1.read("hi"))).to.equal("Hello");
+      expect(await repo2.read("hi")).to.be.undefined;
+
+      let [s1, s2] = getCopyStreams()
+
+      await Promise.all([
+         startSyncRemote(s1, repo1),
+         startSyncClient(s2, repo2)
+      ]);
+
+      expect((await repo1.readdir("/")).length).to.equal(1);
+      expect((await repo2.readdir("/")).length).to.equal(1);
+      expect(td(await repo1.read("hi"))).to.equal("Hello");
+      expect(td(await repo2.read("hi"))).to.equal("Hello");
+   })
+
+});

sync_proto.binc

@@ -0,0 +1,43 @@
+type SyncInitRequest {
+   clientCommit: string  = 0;
+}
+
+type SyncInitResponse {
+   remoteCommit: string  = 0;
+   needPull    : boolean = 1;
+   needPush    : boolean = 2;
+}
+
+type Commit {
+   id    : string = 0;
+   root  : string = 1;
+   before: string = 2;
+   merge : string = 3;
+   date  : uint64 = 4;
+}
+
+
+type PullGetLogRequest {
+   limit: uint32 = 0;
+   start: string = 1;
+}
+
+type PullGetLogResponse {
+   commits: Commit[] = 0;
+}
+
+type PullObjectRequest {
+   id  : string = 0;
+   type: string = 1;
+}
+
+type PullObjectResponse {
+   found: boolean = 0;
+   data : bytes   = 1;
+}
+
+service Sync {
+   SyncInit(SyncInitRequest): SyncInitResponse;
+   PullGetLog(PullGetLogRequest): PullGetLogResponse;
+   PullObject(PullObjectRequest): PullObjectResponse;
+}