fix: native token allowance, evm chain

README.md

@@ -111,7 +111,7 @@ EVM Provider example:
 import { EvmProvider } from "@balanced/solver-sdk"
 
 // NOTE: user address should be provided by application when user connects wallet
-const evmProvider = new EvmProvider("0x3FF796F1968C515f6AC2833545B5Dd2cE765A1a1", (window as any).ethereum)
+const evmProvider = new EvmProvider("0x3FF796F1968C515f6AC2833545B5Dd2cE765A1a1", "arb", (window as any).ethereum)
 ```
 
 SUI Provider example (uses [SUI dApp Kit](https://sdk.mystenlabs.com/dapp-kit/):
@@ -142,7 +142,7 @@ import { IntentService, EvmProvider, CreateIntentOrderPayload, IntentStatusCode
 
 // create EVM provider because "arb" is of ChainType "evm" (defined in ChainConfig type - see section Load SDK Config)
 // NOTE: window can only be accessed client side (browser)
-const evmProvider = new EvmProvider("0x601020c5797Cdd34f64476b9bf887a353150Cb9a", (window as any).ethereum)
+const evmProvider = new EvmProvider("0x601020c5797Cdd34f64476b9bf887a353150Cb9a", "arb", (window as any).ethereum)
 
 const intentOrderPayload: CreateIntentOrderPayload = {
   quote_uuid: "a0dd7652-b360-4123-ab2d-78cfbcd20c6b",
@@ -221,7 +221,7 @@ Example cancel order:
 ```typescript
 import { IntentService, SwapOrder, EvmProvider } from "@balanced/solver-sdk"
 
-const evmProvider = new EvmProvider("0x601020c5797Cdd34f64476b9bf887a353150Cb9a", (window as any).ethereum)
+const evmProvider = new EvmProvider("0x601020c5797Cdd34f64476b9bf887a353150Cb9a", "arb", (window as any).ethereum)
 const intentOrder: Result<SwapOrder> = await IntentService.getOrder(
   "0xabcdefasdasdsafssadasdsadsadasdsadasdsadsa",
   IntentService.getChainConfig("arb").intentContract,
@@ -259,7 +259,7 @@ Example get order:
 ```typescript
 import { IntentService, SwapOrder, EvmProvider } from "@balanced/solver-sdk"
 
-const evmProvider = new EvmProvider("0x601020c5797Cdd34f64476b9bf887a353150Cb9a", (window as any).ethereum)
+const evmProvider = new EvmProvider("0x601020c5797Cdd34f64476b9bf887a353150Cb9a", "arb", (window as any).ethereum)
 const intentOrder: Result<SwapOrder> = await IntentService.getOrder(
   "0xabcdefasdasdsafssadasdsadsadasdsadasdsadsa",
   IntentService.getChainConfig("arb").intentContract,

src/constants.ts

@@ -1,9 +1,22 @@
 import type { ChainConfig, ChainName, EvmChainConfig, SuiChainConfig } from "./types.js"
+import { arbitrum } from "viem/chains"
+import type { Chain } from "viem"
 
 export const DEFAULT_MAX_RETRY = 3
 export const DEFAULT_RETRY_DELAY_MS = 2000
 export const SOLVER_API_ENDPOINT = "http://34.224.47.185" // TODO - replace with the production one
 
+export const supportedChains: ChainName[] = ["arb", "sui"]
+
+export function getEvmViemChain(chainName: ChainName): Chain {
+  switch (chainName) {
+    case "arb":
+      return arbitrum
+    default:
+      throw new Error(`Unsupported EVM chain: ${chainName}`)
+  }
+}
+
 export const chainConfig: Record<ChainName, ChainConfig> = {
   ["arb"]: {
     chain: {
@@ -44,5 +57,3 @@ export const chainConfig: Record<ChainName, ChainConfig> = {
     ],
   } satisfies SuiChainConfig,
 } as const
-
-export const supportedChains: ChainName[] = Object.keys(chainConfig) as ChainName[]

src/entities/Providers.ts

@@ -1,6 +1,7 @@
 import {
   type Account,
   type Address,
+  type Chain,
   createPublicClient,
   createWalletClient,
   custom,
@@ -11,21 +12,26 @@ import {
 import { type Wallet, type WalletAccount } from "@mysten/wallet-standard"
 import { getFullnodeUrl, SuiClient } from "@mysten/sui/client"
 import type { ChainName, ChainType, SuiNetworkType } from "../types.js"
+import { getEvmViemChain } from "../constants.js"
 
 export type CustomProvider = { request(...args: any): Promise<any> }
 
 export class EvmProvider {
-  public readonly walletClient: WalletClient<CustomTransport, undefined, Account>
+  public readonly walletClient: WalletClient<CustomTransport, Chain, Account>
   public readonly publicClient: PublicClient<CustomTransport>
 
-  constructor(userAddress: Address, provider: CustomProvider) {
+  constructor(userAddress: Address, chain: ChainName, provider: CustomProvider) {
     this.walletClient = createWalletClient({
       account: userAddress,
       transport: custom(provider),
+      chain: getEvmViemChain(chain),
     })
     this.publicClient = createPublicClient({
       transport: custom(provider),
+      chain: getEvmViemChain(chain),
     })
+
+    console.log("Evm provider initialised with chain id:", this.walletClient.chain.id)
   }
 }
 

src/services/EvmIntentService.ts

@@ -23,6 +23,13 @@ export class EvmIntentService {
     provider: EvmProvider,
   ): Promise<Result<boolean>> {
     try {
+      if (token == chainConfig.nativeToken) {
+        return {
+          ok: true,
+          value: true,
+        }
+      }
+
       const allowedAmount = await provider.publicClient.readContract({
         address: token,
         abi: erc20Abi,
@@ -61,7 +68,6 @@ export class EvmIntentService {
         abi: erc20Abi,
         functionName: "approve",
         args: [address, amount],
-        chain: undefined,
       })
 
       return {
@@ -117,7 +123,6 @@ export class EvmIntentService {
           abi: intentAbi,
           functionName: "swap",
           args: [intent.toObjectData()],
-          chain: undefined,
           value: isNative ? intent.amount : undefined,
         }),
       }
@@ -148,7 +153,6 @@ export class EvmIntentService {
           abi: intentAbi,
           functionName: "cancel",
           args: [orderId],
-          chain: undefined,
         }),
       }
     } catch (e) {