diff --git a/packages/graph-node/assembly/index.ts b/packages/graph-node/assembly/index.ts
index 99084968..acf593d7 100644
--- a/packages/graph-node/assembly/index.ts
+++ b/packages/graph-node/assembly/index.ts
@@ -72,3 +72,11 @@ export class Bar {
     return this.prop;
   }
 }
+
+export function testLog (): void {
+  log.debug('Debug message: {}, {}', ['value1', 'value2']);
+  log.info('Info message: {}', ['value1', 'value2']);
+  log.warning('Warning message', []);
+  log.error('Error message', []);
+  log.critical('Critical message', []);
+}
diff --git a/packages/graph-node/package.json b/packages/graph-node/package.json
index 6b5cada3..b604a1bd 100644
--- a/packages/graph-node/package.json
+++ b/packages/graph-node/package.json
@@ -30,7 +30,7 @@
     "asbuild:debug": "asc assembly/index.ts --lib ./node_modules --exportRuntime --target debug --runPasses asyncify",
     "asbuild:release": "asc assembly/index.ts --lib ./node_modules --exportRuntime --target release --runPasses asyncify",
     "asbuild": "yarn asbuild:debug && yarn asbuild:release",
-    "test": "yarn asbuild:debug && mocha src/**/*.test.ts",
+    "test": "yarn asbuild:debug && DEBUG=vulcanize:* mocha src/**/*.test.ts",
     "build:example": "cd test/subgraph/example1 && yarn && yarn build",
     "watch": "DEBUG=vulcanize:* nodemon --watch src src/watcher.ts",
     "compare-entity": "DEBUG=vulcanize:* ts-node src/cli/compare/compare-entity.ts"
diff --git a/packages/graph-node/src/loader.test.ts b/packages/graph-node/src/loader.test.ts
index f25b2914..a9217aa8 100644
--- a/packages/graph-node/src/loader.test.ts
+++ b/packages/graph-node/src/loader.test.ts
@@ -64,4 +64,11 @@ describe('wasm loader tests', () => {
     const bar = await Bar.__new(await __newString('test'));
     expect(__getString(await bar.prop)).to.equal('test');
   });
+
+  it('should log messages', async () => {
+    const { testLog } = exports;
+
+    // Should print all log messages for different levels.
+    await testLog();
+  });
 });
diff --git a/packages/graph-node/src/loader.ts b/packages/graph-node/src/loader.ts
index b24c6c96..b119a2a0 100644
--- a/packages/graph-node/src/loader.ts
+++ b/packages/graph-node/src/loader.ts
@@ -13,11 +13,12 @@ import {
 } from 'ethers';
 import JSONbig from 'json-bigint';
 import BN from 'bn.js';
+import debug from 'debug';
 
 import loader from '@vulcanize/assemblyscript/lib/loader';
 import { IndexerInterface } from '@vulcanize/util';
 
-import { TypeId } from './types';
+import { TypeId, Level } from './types';
 import { Block, fromEthereumValue, toEthereumValue, resolveEntityFieldConflicts, GraphDecimal, digitsToString } from './utils';
 import { Database } from './database';
 
@@ -52,6 +53,8 @@ export interface Context {
   }
 }
 
+const log = debug('vulcanize:graph-node');
+
 export const instantiate = async (
   database: Database,
   indexer: IndexerInterface,
@@ -76,7 +79,7 @@ export const instantiate = async (
           return null;
         }
 
-        return database.toGraphEntity(exports, entityName, entityData);
+        return database.toGraphEntity(instanceExports, entityName, entityData);
       },
       'store.set': async (entity: number, id: number, data: number) => {
         const entityName = __getString(entity);
@@ -84,7 +87,7 @@ export const instantiate = async (
         const entityInstance = await Entity.wrap(data);
 
         assert(context.event.block);
-        let dbData = await database.fromGraphEntity(exports, context.event.block, entityName, entityInstance);
+        let dbData = await database.fromGraphEntity(instanceExports, context.event.block, entityName, entityInstance);
         await database.saveEntity(entityName, dbData);
 
         // Resolve any field name conflicts in the dbData for auto-diff.
@@ -103,8 +106,8 @@ export const instantiate = async (
         await indexer.createDiffStaged(dataSource.address, context.event.block.blockHash, diffData);
       },
 
-      'log.log': (_: number, msg: number) => {
-        console.log('log.log', __getString(msg));
+      'log.log': (level: number, msg: number) => {
+        log('log %s | %s', Level[level], __getString(msg));
       },
 
       'test.asyncMethod': async () => {
@@ -148,7 +151,7 @@ export const instantiate = async (
         try {
           const functionParamsPromise = functionParams.map(async param => {
             const ethereumValue = await ethereum.Value.wrap(param);
-            return fromEthereumValue(exports, ethereumValue);
+            return fromEthereumValue(instanceExports, ethereumValue);
           });
 
           functionParams = await Promise.all(functionParamsPromise);
@@ -172,7 +175,7 @@ export const instantiate = async (
               output: any,
               index: number
             ) => toEthereumValue(
-              exports,
+              instanceExports,
               output,
               result[index]
             )
@@ -214,8 +217,14 @@ export const instantiate = async (
 
         return ptr;
       },
-      'typeConversion.bigIntToHex': () => {
-        console.log('index typeConversion.bigIntToHex');
+      'typeConversion.bigIntToHex': async (bigInt: number) => {
+        const bigIntInstance = await BigInt.wrap(bigInt);
+        const bigIntString = await bigIntInstance.toString();
+
+        const bigNumber = BigNumber.from(__getString(bigIntString));
+        const bigNumberHex = bigNumber.toHexString();
+
+        return __newString(bigNumberHex);
       },
 
       'typeConversion.bytesToHex': async (bytes: number) => {
@@ -225,11 +234,19 @@ export const instantiate = async (
 
         return ptr;
       },
-      'typeConversion.bytesToString': () => {
-        console.log('index typeConversion.bytesToString');
+      'typeConversion.bytesToString': async (bytes: number) => {
+        const byteArray = __getArray(bytes);
+        const string = utils.toUtf8String(byteArray);
+        const ptr = await __newString(string);
+
+        return ptr;
       },
-      'typeConversion.bytesToBase58': () => {
-        console.log('index typeConversion.bytesToBase58');
+      'typeConversion.bytesToBase58': async (n: number) => {
+        const uint8Array = __getArray(n);
+        const string = utils.base58.encode(uint8Array);
+        const ptr = await __newString(string);
+
+        return ptr;
       }
     },
     numbers: {
@@ -464,20 +481,80 @@ export const instantiate = async (
 
         return remainderBigInt;
       },
-      'bigInt.bitOr': () => {
-        console.log('bigInt.bitOr');
+      'bigInt.bitOr': async (x: number, y: number) => {
+        // Create a bigNumber x.
+        const xBigInt = await BigInt.wrap(x);
+        const xStringPtr = await xBigInt.toString();
+        const xBigNumber = BigNumber.from(__getString(xStringPtr));
+
+        // Create a bigNumber y.
+        const yBigInt = await BigInt.wrap(y);
+        const yStringPtr = await yBigInt.toString();
+        const yBigNumber = BigNumber.from(__getString(yStringPtr));
+
+        // Perform the bigNumber bit or operation.
+        const res = xBigNumber.or(yBigNumber);
+        const ptr = await __newString(res.toString());
+        const resBigInt = BigInt.fromString(ptr);
+
+        return resBigInt;
       },
-      'bigInt.bitAnd': () => {
-        console.log('bigInt.bitAnd');
+      'bigInt.bitAnd': async (x: number, y: number) => {
+        // Create a bigNumber x.
+        const xBigInt = await BigInt.wrap(x);
+        const xStringPtr = await xBigInt.toString();
+        const xBigNumber = BigNumber.from(__getString(xStringPtr));
+
+        // Create a bigNumber y.
+        const yBigInt = await BigInt.wrap(y);
+        const yStringPtr = await yBigInt.toString();
+        const yBigNumber = BigNumber.from(__getString(yStringPtr));
+
+        // Perform the bigNumber bit and operation.
+        const res = xBigNumber.and(yBigNumber);
+        const ptr = await __newString(res.toString());
+        const resBigInt = BigInt.fromString(ptr);
+
+        return resBigInt;
       },
-      'bigInt.leftShift': () => {
-        console.log('bigInt.leftShift');
+      'bigInt.leftShift': async (x: number, y: number) => {
+        // Create a bigNumber x.
+        const xBigInt = await BigInt.wrap(x);
+        const xStringPtr = await xBigInt.toString();
+        const xBigNumber = BigNumber.from(__getString(xStringPtr));
+
+        // Perform the bigNumber left shift operation.
+        const res = xBigNumber.shl(y);
+        const ptr = await __newString(res.toString());
+        const resBigInt = BigInt.fromString(ptr);
+
+        return resBigInt;
       },
-      'bigInt.rightShift': () => {
-        console.log('bigInt.rightShift');
+      'bigInt.rightShift': async (x: number, y: number) => {
+        // Create a bigNumber x.
+        const xBigInt = await BigInt.wrap(x);
+        const xStringPtr = await xBigInt.toString();
+        const xBigNumber = BigNumber.from(__getString(xStringPtr));
+
+        // Perform the bigNumber right shift operation.
+        const res = xBigNumber.shr(y);
+        const ptr = await __newString(res.toString());
+        const resBigInt = BigInt.fromString(ptr);
+
+        return resBigInt;
       },
-      'bigInt.pow': () => {
-        console.log('bigInt.pow');
+      'bigInt.pow': async (x: number, y: number) => {
+        // Create a bigNumber x.
+        const xBigInt = await BigInt.wrap(x);
+        const xStringPtr = await xBigInt.toString();
+        const xBigNumber = BigNumber.from(__getString(xStringPtr));
+
+        // Perform the bigNumber pow operation.
+        const res = xBigNumber.pow(y);
+        const ptr = await __newString(res.toString());
+        const resBigInt = BigInt.fromString(ptr);
+
+        return resBigInt;
       }
     },
     datasource: {
@@ -490,17 +567,17 @@ export const instantiate = async (
   };
 
   const instance = await loader.instantiate(buffer, imports);
-  const { exports } = instance;
+  const { exports: instanceExports } = instance;
 
-  const { __getString, __newString, __getArray, __newArray } = exports;
+  const { __getString, __newString, __getArray, __newArray } = instanceExports;
 
   // TODO: Assign from types file generated by graph-cli
-  const getIdOfType: idOfType = exports.id_of_type as idOfType;
-  const BigDecimal: any = exports.BigDecimal as any;
-  const BigInt: any = exports.BigInt as any;
-  const Address: any = exports.Address as any;
-  const ethereum: any = exports.ethereum as any;
-  const Entity: any = exports.Entity as any;
+  const getIdOfType: idOfType = instanceExports.id_of_type as idOfType;
+  const BigDecimal: any = instanceExports.BigDecimal as any;
+  const BigInt: any = instanceExports.BigInt as any;
+  const Address: any = instanceExports.Address as any;
+  const ethereum: any = instanceExports.ethereum as any;
+  const Entity: any = instanceExports.Entity as any;
 
   return instance;
 };
diff --git a/packages/graph-node/src/numbers.test.ts b/packages/graph-node/src/numbers.test.ts
index 69ab2036..cc5c7908 100644
--- a/packages/graph-node/src/numbers.test.ts
+++ b/packages/graph-node/src/numbers.test.ts
@@ -125,6 +125,41 @@ describe('numbers wasm tests', () => {
     expect(__getString(ptr)).to.equal('1283174719');
   });
 
+  it('should execute bigInt bitOr API', async () => {
+    const { testBigIntBitOr, __getString, __newString } = exports;
+
+    const ptr = await testBigIntBitOr(await __newString('2315432122132354'), await __newString('5465265645'));
+    expect(__getString(ptr)).to.equal('2315433208543215');
+  });
+
+  it('should execute bigInt bitAnd API', async () => {
+    const { testBigIntBitAnd, __getString, __newString } = exports;
+
+    const ptr = await testBigIntBitAnd(await __newString('2315432122132354'), await __newString('5465265645'));
+    expect(__getString(ptr)).to.equal('4378854784');
+  });
+
+  it('should execute bigInt leftShift API', async () => {
+    const { testBigIntLeftShift, __getString, __newString } = exports;
+
+    const ptr = await testBigIntLeftShift(await __newString('2315432122132354'), 3);
+    expect(__getString(ptr)).to.equal('18523456977058832');
+  });
+
+  it('should execute bigInt rightShift API', async () => {
+    const { testBigIntRightShift, __getString, __newString } = exports;
+
+    const ptr = await testBigIntRightShift(await __newString('2315432122132354'), 3);
+    expect(__getString(ptr)).to.equal('289429015266544');
+  });
+
+  it('should execute bigInt pow API', async () => {
+    const { testBigIntPow, __getString, __newString } = exports;
+
+    const ptr = await testBigIntPow(await __newString('2315432'), 5);
+    expect(__getString(ptr)).to.equal('66551853520489467542782546706432');
+  });
+
   it('should execute bigDecimal toString API', async () => {
     const { testBigDecimalToString, __newString, __getString } = exports;
 
diff --git a/packages/graph-node/src/type-conversion.test.ts b/packages/graph-node/src/type-conversion.test.ts
index e38153b0..be7ab941 100644
--- a/packages/graph-node/src/type-conversion.test.ts
+++ b/packages/graph-node/src/type-conversion.test.ts
@@ -4,6 +4,7 @@
 
 import path from 'path';
 import { expect } from 'chai';
+import { utils, BigNumber } from 'ethers';
 
 import { instantiate } from './loader';
 import { getTestDatabase, getTestIndexer } from '../test/utils';
@@ -56,4 +57,39 @@ describe('typeConversion wasm tests', () => {
     const ptr = await testStringToH160();
     expect(__getString(ptr)).to.equal('0xafad925b5eae1e370196cba39893e858ff7257d5');
   });
+
+  it('should execute typeConversion bigIntToHex API', async () => {
+    const { testBigIntToHex, __getString, __getArray, __newString } = exports;
+
+    // Using smaller to also test with BigInt.fromI32
+    const bigNumber = BigNumber.from('2342353');
+    const value = await __newString(bigNumber.toString());
+
+    const ptr = await testBigIntToHex(value);
+    const ptrs = __getArray(ptr);
+    expect(__getString(ptrs[0])).to.equal(__getString(ptrs[1]));
+    expect(__getString(ptrs[0])).to.equal(bigNumber.toHexString());
+  });
+
+  it('should execute typeConversion bytesToString API', async () => {
+    const { testBytesToString, __getString, __newString } = exports;
+
+    const testString = 'test string';
+    const value = await __newString(testString);
+
+    const ptr = await testBytesToString(value);
+    expect(__getString(ptr)).to.equal(testString);
+  });
+
+  it('should execute typeConversion bytesToBase58 API', async () => {
+    const { testBytesToBase58, __getString, __newString } = exports;
+
+    const testString = 'test base58';
+    const value = await __newString(testString);
+
+    const ptr = await testBytesToBase58(value);
+
+    const base58String = utils.base58.encode(utils.toUtf8Bytes(testString));
+    expect(__getString(ptr)).to.equal(base58String);
+  });
 });
diff --git a/packages/graph-node/src/types.ts b/packages/graph-node/src/types.ts
index 977e66c2..a4a23144 100644
--- a/packages/graph-node/src/types.ts
+++ b/packages/graph-node/src/types.ts
@@ -2,7 +2,7 @@
 // Copyright 2021 Vulcanize, Inc.
 //
 
-// TypeId from https://github.com/graphprotocol/graph-ts/blob/master/global/global.ts
+// Enum types from @graphprotocol/graph-ts.
 export enum TypeId {
   String = 0,
   ArrayBuffer = 1,
@@ -58,7 +58,6 @@ export enum TypeId {
   ArrayBigDecimal = 51,
 }
 
-// ethereum ValueKind from https://github.com/graphprotocol/graph-ts/blob/master/chain/ethereum.ts#L13
 export enum EthereumValueKind {
   ADDRESS = 0,
   FIXED_BYTES = 1,
@@ -72,7 +71,6 @@ export enum EthereumValueKind {
   TUPLE = 9,
 }
 
-// ValueKind from https://github.com/graphprotocol/graph-ts/blob/master/common/value.ts#L8
 export enum ValueKind {
   STRING = 0,
   INT = 1,
@@ -83,3 +81,11 @@ export enum ValueKind {
   BYTES = 6,
   BIGINT = 7,
 }
+
+export enum Level {
+  CRITICAL = 0,
+  ERROR = 1,
+  WARNING = 2,
+  INFO = 3,
+  DEBUG = 4,
+}
diff --git a/packages/graph-node/src/watcher.ts b/packages/graph-node/src/watcher.ts
index 86937d91..db175811 100644
--- a/packages/graph-node/src/watcher.ts
+++ b/packages/graph-node/src/watcher.ts
@@ -129,7 +129,7 @@ export class GraphWatcher {
       return;
     }
 
-    const { instance: { exports }, contractInterface } = this._dataSourceMap[contract];
+    const { instance: { exports: instanceExports }, contractInterface } = this._dataSourceMap[contract];
 
     const eventFragment = contractInterface.getEvent(eventSignature);
 
@@ -142,9 +142,9 @@ export class GraphWatcher {
     };
 
     // Create ethereum event to be passed to the wasm event handler.
-    const ethereumEvent = await createEvent(exports, contract, data);
+    const ethereumEvent = await createEvent(instanceExports, contract, data);
 
-    await exports[eventHandler.handler](ethereumEvent);
+    await instanceExports[eventHandler.handler](ethereumEvent);
   }
 
   async handleBlock (blockHash: string) {
@@ -159,14 +159,14 @@ export class GraphWatcher {
         continue;
       }
 
-      const { instance: { exports } } = this._dataSourceMap[dataSource.source.address];
+      const { instance: { exports: instanceExports } } = this._dataSourceMap[dataSource.source.address];
 
       // Create ethereum block to be passed to a wasm block handler.
-      const ethereumBlock = await createBlock(exports, blockData);
+      const ethereumBlock = await createBlock(instanceExports, blockData);
 
       // Call all the block handlers one after the another for a contract.
       const blockHandlerPromises = dataSource.mapping.blockHandlers.map(async (blockHandler: any): Promise<void> => {
-        await exports[blockHandler.handler](ethereumBlock);
+        await instanceExports[blockHandler.handler](ethereumBlock);
       });
 
       await Promise.all(blockHandlerPromises);
diff --git a/packages/graph-node/test/subgraph/example1/src/mapping.ts b/packages/graph-node/test/subgraph/example1/src/mapping.ts
index edbd24f0..d6304054 100644
--- a/packages/graph-node/test/subgraph/example1/src/mapping.ts
+++ b/packages/graph-node/test/subgraph/example1/src/mapping.ts
@@ -112,7 +112,6 @@ export function testGetEthCall (): void {
   log.debug('In test get eth call', []);
 
   // Bind the contract to the address that emitted the event.
-  // TODO: Address.fromString throws error in WASM module instantiation.
   const contractAddress = dataSource.address();
   const contract = Example1.bind(contractAddress);
 
@@ -170,6 +169,26 @@ export function testBytesToHex (): string {
   return res;
 }
 
+export function testBytesToString (value: string): string {
+  log.debug('In test bytesToString', []);
+
+  const byteArray = ByteArray.fromUTF8(value);
+  const res = byteArray.toString();
+  log.debug('typeConversion.bytesToString result: {}', [res]);
+
+  return res;
+}
+
+export function testBytesToBase58 (value: string): string {
+  log.debug('In test bytesToBase58', []);
+
+  const byteArray = ByteArray.fromUTF8(value);
+  const res = byteArray.toBase58();
+  log.debug('typeConversion.bytesToBase58 result: {}', [res]);
+
+  return res;
+}
+
 export function testBigIntToString (): string {
   log.debug('In test bigIntToString', []);
 
@@ -325,6 +344,61 @@ export function testBigIntMod (value1: string, value2: string): string {
   return res.toString();
 }
 
+export function testBigIntBitOr (value1: string, value2: string): string {
+  log.debug('In test bigInt.bitOr', []);
+
+  const bigInt1 = BigInt.fromString(value1);
+  const bigInt2 = BigInt.fromString(value2);
+
+  const res = bigInt1 | bigInt2;
+  log.debug('bigInt.bitOr result: {}', [res.toString()]);
+  return res.toString();
+}
+
+export function testBigIntBitAnd (value1: string, value2: string): string {
+  log.debug('In test bigInt.bitAnd', []);
+
+  const bigInt1 = BigInt.fromString(value1);
+  const bigInt2 = BigInt.fromString(value2);
+
+  const res = bigInt1 & bigInt2;
+  log.debug('bigInt.bitAnd result: {}', [res.toString()]);
+  return res.toString();
+}
+
+export function testBigIntLeftShift (value1: string, value2: u8): string {
+  log.debug('In test bigInt.leftShift', []);
+
+  const bigInt1 = BigInt.fromString(value1);
+  const bits = value2;
+
+  const res = bigInt1 << bits;
+  log.debug('bigInt.leftShift result: {}', [res.toString()]);
+  return res.toString();
+}
+
+export function testBigIntRightShift (value1: string, value2: u8): string {
+  log.debug('In test bigInt.RightShift', []);
+
+  const bigInt1 = BigInt.fromString(value1);
+  const bits = value2;
+
+  const res = bigInt1 >> bits;
+  log.debug('bigInt.RightShift result: {}', [res.toString()]);
+  return res.toString();
+}
+
+export function testBigIntPow (value1: string, value2: u8): string {
+  log.debug('In test bigInt.pow', []);
+
+  const bigInt1 = BigInt.fromString(value1);
+  const exp = value2;
+
+  const res = bigInt1.pow(exp);
+  log.debug('bigInt.pow result: {}', [res.toString()]);
+  return res.toString();
+}
+
 export function testBigIntFromString (value: string): string {
   log.debug('In test bigInt.fromString', []);
 
@@ -354,3 +428,20 @@ export function testBigIntWithI32 (value: string): string[] {
 
   return [res1, res2, res3];
 }
+
+export function testBigIntToHex (value: string): string[] {
+  log.debug('In testBigIntToHex', []);
+
+  const variableI32: i32 = parseInt(value) as i32;
+
+  const bigInt1 = BigInt.fromI32(variableI32);
+  const bigInt2 = BigInt.fromString(value);
+
+  const res1 = bigInt1.toHex();
+  log.debug('bigInt.toHex result 1: {}', [res1]);
+
+  const res2 = bigInt2.toHex();
+  log.debug('bigInt.toHex result 2: {}', [res2]);
+
+  return [res1, res2];
+}
diff --git a/packages/util/src/events.ts b/packages/util/src/events.ts
index 0b928713..0cf0b518 100644
--- a/packages/util/src/events.ts
+++ b/packages/util/src/events.ts
@@ -88,11 +88,11 @@ export class EventWatcher {
 
     switch (kind) {
       case JOB_KIND_INDEX:
-        this._handleIndexingComplete(data);
+        await this._handleIndexingComplete(data);
         break;
 
       case JOB_KIND_PRUNE:
-        this._handlePruningComplete(data);
+        await this._handlePruningComplete(data);
         break;
 
       default: