feat: add an option to read wallet balance at a given height

src/contract/HandlerBasedContract.ts

@@ -233,7 +233,7 @@ export class HandlerBasedContract<State> implements Contract<State> {
     }
     const interactionTx = await this.createInteraction(input, tags, emptyTransfer, strict);
 
-    const response = await fetch(`${this._evaluationOptions.bundlerAddress}gateway/sequencer/register`, {
+    const response = await fetch(`${this._evaluationOptions.bundlerUrl}gateway/sequencer/register`, {
       method: 'POST',
       body: JSON.stringify(interactionTx),
       headers: {

src/core/modules/StateEvaluator.ts

@@ -104,7 +104,7 @@ export class DefaultEvaluationOptions implements EvaluationOptions {
     saveState: false
   };
 
-  bundlerAddress = 'https://gateway.redstone.finance/';
+  bundlerUrl = 'https://gateway.redstone.finance/';
 
   gasLimit = Number.MAX_SAFE_INTEGER;
 
@@ -115,6 +115,8 @@ export class DefaultEvaluationOptions implements EvaluationOptions {
   useVM2 = false;
 
   allowUnsafeClient = false;
+
+  walletBalanceUrl = 'http://nyc-1.dev.arweave.net:1984/';
 }
 
 // an interface for the contract EvaluationOptions - can be used to change the behaviour of some of the features.
@@ -159,7 +161,7 @@ export interface EvaluationOptions {
     saveState: boolean;
   };
 
-  bundlerAddress: string;
+  bundlerUrl: string;
 
   gasLimit: number;
 
@@ -181,4 +183,7 @@ export interface EvaluationOptions {
   // if set to false - calling unsafe clinet in contract code will
   // result in throwing an exception
   allowUnsafeClient: boolean;
+
+  // an endpoint for retrieving wallet balance info
+  walletBalanceUrl: string;
 }

src/core/modules/impl/HandlerExecutorFactory.ts

@@ -46,10 +46,14 @@ export class HandlerExecutorFactory implements ExecutorFactory<HandlerApi<unknow
     contractDefinition: ContractDefinition<State>,
     evaluationOptions: EvaluationOptions
   ): Promise<HandlerApi<State>> {
-    const swGlobal = new SmartWeaveGlobal(this.arweave, {
+    const swGlobal = new SmartWeaveGlobal(
-      id: contractDefinition.txId,
+      this.arweave,
-      owner: contractDefinition.owner
+      {
-    });
+        id: contractDefinition.txId,
+        owner: contractDefinition.owner
+      },
+      evaluationOptions
+    );
 
     if (contractDefinition.contractType == 'wasm') {
       this.logger.info('Creating handler for wasm contract', contractDefinition.txId);

src/legacy/smartweave-global.ts

@@ -1,6 +1,7 @@
 /* eslint-disable */
 import Arweave from 'arweave';
 import { GQLNodeInterface, GQLTagInterface } from './gqlResult';
+import {EvaluationOptions} from "@smartweave/core";
 
 /**
  *
@@ -51,9 +52,9 @@ export class SmartWeaveGlobal {
 
   caller?: string;
 
-  constructor(arweave: Arweave, contract: { id: string; owner: string }, gasLimit = Number.MAX_SAFE_INTEGER) {
+  constructor(arweave: Arweave, contract: { id: string; owner: string }, evaluationOptions: EvaluationOptions) {
     this.gasUsed = 0;
-    this.gasLimit = gasLimit;
+    this.gasLimit = Number.MAX_SAFE_INTEGER;
     this.unsafeClient = arweave;
     this.arweave = {
       ar: arweave.ar,
@@ -61,6 +62,24 @@ export class SmartWeaveGlobal {
       wallets: arweave.wallets,
       crypto: arweave.crypto
     };
+    this.arweave.wallets.getBalance = async (address: string): Promise<string> => {
+      if (!this._activeTx) {
+        throw new Error("Cannot read balance - active tx is not set.");
+      }
+      if (!this.block.height) {
+        throw new Error("Cannot read balance - block height not set.")
+      }
+      console.log(`${evaluationOptions.walletBalanceUrl}block/height/${this.block.height}/wallet/${address}/balance`);
+
+      // http://nyc-1.dev.arweave.net:1984/block/height/914387/wallet/M-mpNeJbg9h7mZ-uHaNsa5jwFFRAq0PsTkNWXJ-ojwI/balance
+      return await fetch(`${evaluationOptions.walletBalanceUrl}block/height/${this.block.height}/wallet/${address}/balance`)
+        .then((res) => {
+          return res.ok ? res.text() : Promise.reject(res);
+        })
+        .catch((error) => {
+          throw new Error(`Unable to read wallet balance. ${error.status}. ${error.body?.message}`);
+        });
+    }
     this.contract = contract;
     this.transaction = new Transaction(this);
     this.block = new Block(this);

tools/data/js/token-pst.js

@@ -1,9 +1,20 @@
-export function handle(state, action) {
+export async function handle(state, action) {
   const balances = state.balances;
   const canEvolve = state.canEvolve;
   const input = action.input;
   const caller = action.caller;
 
+  if (input.function === 'storeBalance') {
+    const target = input.target;
+    const height = SmartWeave.block.height;
+    if (state.wallets.height === undefined) {
+      state.wallets[height] = {};
+    }
+    state.wallets[height][target] = await SmartWeave.arweave.wallets.getBalance(target);
+
+    return { state };
+  }
+
   if (input.function === 'transfer') {
     const target = input.target;
     const qty = input.qty;
@@ -34,7 +45,7 @@ export function handle(state, action) {
       balances[target] = qty;
     }
 
-    return { state };
+    return {state};
   }
 
   if (input.function === 'balance') {
@@ -49,7 +60,7 @@ export function handle(state, action) {
       throw new ContractError('Cannot get balance, target does not exist');
     }
 
-    return { result: { target, ticker, balance: balances[target] } };
+    return {result: {target, ticker, balance: balances[target]}};
   }
 
   if (input.function === 'evolve' && canEvolve) {
@@ -59,8 +70,9 @@ export function handle(state, action) {
 
     state.evolve = input.value;
 
-    return { state };
+    return {state};
   }
 
+
   throw new ContractError(`No function supplied or function not recognised: "${input.function}"`);
 }

tools/data/js/token-pst.json

@@ -5,5 +5,6 @@
   "balances": {
     "uhE-QeYS8i4pmUtnxQyHD7dzXFNaJ9oMK-IM-QPNY6M": 10000000,
     "33F0QHcb22W7LwWR1iRC8Az1ntZG09XQ03YWuw2ABqA": 23111222
-  }
+  },
+  "wallets": {}
 }

tools/deploytest.ts

@@ -28,11 +28,11 @@ async function main() {
     const initialState = fs.readFileSync(path.join(__dirname, 'data/js/token-pst.json'), 'utf8');
 
     // case 1 - full deploy, js contract
-    const contractTxId = await smartweave.createContract.deploy({
+   /* const contractTxId = await smartweave.createContract.deploy({
       wallet,
       initState: initialState,
       src: jsContractSrc,
-    }, true);
+    }, true);*/
 
     // case 2 - deploy from source, js contract
     /*const contractTxId = await smartweave.createContract.deployFromSourceTx({
@@ -57,7 +57,14 @@ async function main() {
       srcTxId: "5wXT-A0iugP9pWEyw-iTbB0plZ_AbmvlNKyBfGS3AUY",
     }, true);*/
 
-    const {state, validity} = await smartweave.contract(contractTxId).readState();
+    const contract = smartweave.contract("CRMRwP-poSTYI7f9fI-vF0CKaTTJTIl74KQYbnJ4hnE").connect(wallet);
+
+    const result = await contract.writeInteraction<any>({
+      function: "storeBalance",
+      target: "M-mpNeJbg9h7mZ-uHaNsa5jwFFRAq0PsTkNWXJ-ojwI",
+    });
+
+    //const {state, validity} = await contract.readState();
 
     //logger.info("Result", state);