Add Conditional Order factory

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@cowprotocol/cow-sdk",
-  "version": "3.0.0-rc.1",
+  "version": "3.0.0-rc.3",
   "license": "(MIT OR Apache-2.0)",
   "files": [
     "/dist"

src/composable/ConditionalOrder.spec.ts

@@ -1,6 +1,6 @@
 import { ConditionalOrder } from './ConditionalOrder'
 import { IsValidResult, PollResultErrors } from './types'
-import { Twap } from './types/Twap'
+import { Twap } from './orderTypes/Twap'
 import { encodeParams } from './utils'
 
 const TWAP_SERIALIZED = (salt?: string, handler?: string): string => {

src/composable/ConditionalOrder.ts

@@ -11,7 +11,7 @@ import {
   PollResultCode,
   PollResultErrors,
 } from './types'
-import { SupportedChainId } from 'src/common'
+import { SupportedChainId } from '../common'
 import { getComposableCow, getComposableCowInterface } from './contracts'
 
 /**

src/composable/ConditionalOrderFactory.ts

@@ -0,0 +1,24 @@
+import { type ConditionalOrder } from './ConditionalOrder'
+import { ConditionalOrderParams } from './types'
+
+export type FromParams<D, S> = (params: ConditionalOrderParams) => ConditionalOrder<D, S>
+export type ConditionalOrderRegistry = Record<string, FromParams<unknown, unknown>>
+
+export class ConditionalOrderFactory {
+  public knownOrderTypes
+
+  constructor(registry: ConditionalOrderRegistry) {
+    this.knownOrderTypes = registry
+  }
+
+  public fromParams(params: ConditionalOrderParams): ConditionalOrder<unknown, unknown> | undefined {
+    const { handler } = params
+
+    const factory = this.knownOrderTypes[handler]
+    if (!factory) {
+      return undefined
+    }
+
+    return factory(params)
+  }
+}

src/composable/Multiplexer.spec.ts

@@ -1,8 +1,8 @@
 import { Multiplexer, Orders } from './Multiplexer'
 import { SupportedChainId } from '../common'
 import { ProofLocation } from './types'
-import { Twap } from './types/Twap'
-import { TWAP_PARAMS_TEST, generateRandomTWAPData } from './types/Twap.spec'
+import { Twap } from './orderTypes/Twap'
+import { TWAP_PARAMS_TEST, generateRandomTWAPData } from './orderTypes/Twap.spec'
 import { getComposableCowInterface } from './contracts'
 import { BigNumber } from 'ethers'
 

src/composable/Multiplexer.ts

@@ -12,7 +12,7 @@ const CONDITIONAL_ORDER_LEAF_ABI = ['address', 'bytes32', 'bytes']
 
 const PAYLOAD_EMITTED_ABI = ['tuple(bytes32[] proof, tuple(address handler, bytes32 salt, bytes staticInput) params)[]']
 
-export type Orders = Record<string, ConditionalOrder<any, any>>
+export type Orders = Record<string, ConditionalOrder<unknown, unknown>>
 
 /**
  * Multiplexer for conditional orders - using `ComposableCoW`!
@@ -24,7 +24,7 @@ export type Orders = Record<string, ConditionalOrder<any, any>>
  * - Support for passing an optional upload function to upload the proofs to a decentralized storage network
  */
 export class Multiplexer {
-  static orderTypeRegistry: Record<string, new (...args: any[]) => ConditionalOrder<any, any>> = {}
+  static orderTypeRegistry: Record<string, new (...args: unknown[]) => ConditionalOrder<unknown, unknown>> = {}
 
   public chain: SupportedChainId
   public location: ProofLocation
@@ -148,7 +148,7 @@ export class Multiplexer {
       // filter out the merkle tree
       if (k === 'tree') return undefined
       if (typeof v === 'object' && v !== null && 'orderType' in v) {
-        const conditionalOrder = v as ConditionalOrder<any, any>
+        const conditionalOrder = v as ConditionalOrder<unknown, unknown>
         return {
           ...conditionalOrder,
           orderType: conditionalOrder.orderType,
@@ -186,7 +186,10 @@ export class Multiplexer {
    * @param id The id of the `ConditionalOrder` to update.
    * @param updater A function that takes the existing `ConditionalOrder` and context, returning an updated `ConditionalOrder`.
    */
-  update<T, P>(id: string, updater: (order: ConditionalOrder<T, P>, ctx?: string) => ConditionalOrder<T, P>): void {
+  update(
+    id: string,
+    updater: (order: ConditionalOrder<unknown, unknown>, ctx?: string) => ConditionalOrder<unknown, unknown>
+  ): void {
     // copy the existing order and update it, given the existing context (if any)
     const order = updater(this.orders[id], this.ctx)
     // delete the existing order
@@ -204,7 +207,7 @@ export class Multiplexer {
    * @param id The `id` of the `ConditionalOrder` to retrieve.
    * @returns A `ConditionalOrder` with the given `id`.
    */
-  getById(id: string): ConditionalOrder<any, any> {
+  getById(id: string): ConditionalOrder<unknown, unknown> {
     return this.orders[id]
   }
 
@@ -213,7 +216,7 @@ export class Multiplexer {
    * @param i The index of the `ConditionalOrder` to retrieve.
    * @returns A `ConditionalOrder` at the given index.
    */
-  getByIndex(i: number): ConditionalOrder<any, any> {
+  getByIndex(i: number): ConditionalOrder<unknown, unknown> {
     return this.orders[this.orderIds[i]]
   }
 
@@ -431,7 +434,7 @@ export class Multiplexer {
    */
   public static registerOrderType(
     orderType: string,
-    conditionalOrderClass: new (...args: any[]) => ConditionalOrder<any, any>
+    conditionalOrderClass: new (...args: unknown[]) => ConditionalOrder<unknown, unknown>
   ) {
     Multiplexer.orderTypeRegistry[orderType] = conditionalOrderClass
   }

src/composable/index.ts

@@ -2,3 +2,5 @@ export * from './types'
 export * from './utils'
 export * from './ConditionalOrder'
 export * from './Multiplexer'
+export * from './ConditionalOrderFactory'
+export * from './orderTypes'

src/composable/types/Twap.ts → src/composable/orderTypes/Twap.ts

@@ -1,9 +1,16 @@
 import { BigNumber, constants, providers } from 'ethers'
 
 import { ConditionalOrder } from '../ConditionalOrder'
-import { ConditionalOrderArguments, ContextFactory, IsNotValid, IsValid, PollResultErrors } from '../types'
+import {
+  ConditionalOrderArguments,
+  ConditionalOrderParams,
+  ContextFactory,
+  IsNotValid,
+  IsValid,
+  PollResultErrors,
+} from '../types'
 import { encodeParams, isValidAbi } from '../utils'
-import { SupportedChainId } from 'src/common'
+import { SupportedChainId } from '../../common'
 
 // The type of Conditional Order
 const TWAP_ORDER_TYPE = 'twap'
@@ -179,6 +186,16 @@ export class Twap extends ConditionalOrder<TwapData, TwapStruct> {
     return new Twap({ handler: TWAP_ADDRESS, data })
   }
 
+  /**
+   * Create a TWAP order with sound defaults.
+   * @param data The TWAP order parameters in a more user-friendly format.
+   * @returns An instance of the TWAP order.
+   */
+  static fromParams(params: ConditionalOrderParams): Twap {
+    const twap = Twap.deserialize(encodeParams(params))
+    return twap
+  }
+
   /**
    * Enforces that TWAPs will commence at the beginning of a block by use of the
    * `CurrentBlockTimestampFactory` contract to provide the current block timestamp
@@ -283,12 +300,12 @@ export class Twap extends ConditionalOrder<TwapData, TwapStruct> {
 
   /**
    * Deserialize a TWAP order from it's ABI-encoded form.
-   * @param {string} s ABI-encoded TWAP order to deserialize.
+   * @param {string} twapSerialized ABI-encoded TWAP order to deserialize.
    * @returns A deserialized TWAP order.
    */
-  static deserialize(s: string): Twap {
+  static deserialize(twapSerialized: string): Twap {
     return super.deserializeHelper(
-      s,
+      twapSerialized,
       TWAP_ADDRESS,
       TWAP_STRUCT_ABI,
       (struct: TwapStruct, salt: string) =>

src/composable/orderTypes/index.ts

@@ -0,0 +1,8 @@
+import { ConditionalOrderRegistry } from '../ConditionalOrderFactory'
+import { TWAP_ADDRESS, Twap } from './Twap'
+export * from './Twap'
+
+export const DEFAULT_CONDITIONAL_ORDER_REGSTRY: ConditionalOrderRegistry = {
+  // Register of all known order types
+  [TWAP_ADDRESS]: (params) => Twap.fromParams(params),
+}

src/composable/types.ts

@@ -43,7 +43,7 @@ export type ContextFactory = {
   address: string
   // Any arguments that will be passed to the `IValueFactory` to resolve the context.
   factoryArgs?: {
-    args: any[]
+    args: unknown[]
     argsType: string[]
   }
 }
@@ -104,7 +104,7 @@ export interface PollResultSuccess {
 
 export interface PollResultUnexpectedError {
   readonly result: PollResultCode.UNEXPECTED_ERROR
-  readonly error: any
+  readonly error: unknown
 }
 
 export interface PollResultTryNextBlock {

src/composable/utils.spec.ts

@@ -1,6 +1,23 @@
 import { decodeParams, encodeParams, isValidAbi } from './utils'
-import { TwapStruct, transformDataToStruct } from './types/Twap'
-import { TWAP_PARAMS_TEST } from './types/twap.spec'
+import { DurationType, StartTimeValue, TwapData, TwapStruct, transformDataToStruct } from './orderTypes/Twap'
+import { BigNumber, utils } from 'ethers'
+
+export const TWAP_PARAMS_TEST: TwapData = {
+  sellToken: '0x6810e776880C02933D47DB1b9fc05908e5386b96',
+  buyToken: '0xDAE5F1590db13E3B40423B5b5c5fbf175515910b',
+  receiver: '0xDeaDbeefdEAdbeefdEadbEEFdeadbeEFdEaDbeeF',
+  sellAmount: utils.parseEther('1'),
+  buyAmount: utils.parseEther('1'),
+  timeBetweenParts: BigNumber.from(60 * 60),
+  numberOfParts: BigNumber.from(10),
+  durationOfPart: {
+    durationType: DurationType.AUTO,
+  },
+  startTime: {
+    startType: StartTimeValue.AT_MINING_TIME,
+  },
+  appData: '0xd51f28edffcaaa76be4a22f6375ad289272c037f3cc072345676e88d92ced8b5',
+}
 
 const TWAP_STRUCT_ABI = [
   'tuple(address sellToken, address buyToken, address receiver, uint256 partSellAmount, uint256 minPartLimit, uint256 t0, uint256 n, uint256 t, uint256 span, bytes32 appData)',