Tests for Address

packages/utils/src/abi_encoder/calldata.ts

@@ -248,7 +248,7 @@ export class Calldata {
     private selector: string;
     private rules: EncodingRules;
     private sizeInBytes: number;
-    private root: MemberCalldataBlock | undefined;
+    private root: CalldataBlock | undefined;
 
     constructor(rules: EncodingRules) {
         this.selector = '';
@@ -257,8 +257,17 @@ export class Calldata {
         this.root = undefined;
     }
 
-    private createQueue(memberBlock: MemberCalldataBlock): Queue<CalldataBlock> {
+    private createQueue(block: CalldataBlock): Queue<CalldataBlock> {
         const blockQueue = new Queue<CalldataBlock>();
+
+        // Base Case
+        if (block instanceof MemberCalldataBlock === false) {
+            blockQueue.push(block);
+            return blockQueue;
+        }
+
+        // This is a Member Block
+        const memberBlock = block as MemberCalldataBlock;
         _.eachRight(memberBlock.getMembers(), (member: CalldataBlock) => {
             if (member instanceof MemberCalldataBlock) {
                 blockQueue.mergeFront(this.createQueue(member));
@@ -429,7 +438,7 @@ export class Calldata {
         return "";
     }
 
-    public setRoot(block: MemberCalldataBlock) {
+    public setRoot(block: CalldataBlock) {
         this.root = block;
         this.sizeInBytes += block.getSizeInBytes();
     }

packages/utils/src/abi_encoder/data_type.ts

@@ -35,7 +35,7 @@ export abstract class DataType {
         const calldata = new Calldata(rules_);
         if (selector) calldata.setSelector(selector);
         const block = this.generateCalldataBlock(value);
-        calldata.setRoot(block as MemberCalldataBlock); // @TODO CHANGE
+        calldata.setRoot(block); // @TODO CHANGE
         const calldataHex = calldata.toHexString();
         return calldataHex;
     }

packages/utils/src/abi_encoder/evm_data_types.ts

@@ -20,6 +20,8 @@ export interface DataTypeStaticInterface {
 
 export class Address extends PayloadDataType {
     private static SIZE_KNOWN_AT_COMPILE_TIME: boolean = true;
+    public static ERROR_MESSAGE_ADDRESS_MUST_START_WITH_0X = "Address must start with '0x'";
+    public static ERROR_MESSAGE_ADDRESS_MUST_BE_20_BYTES = "Address must be 20 bytes";
 
     constructor(dataItem: DataItem) {
         super(dataItem, EvmDataTypeFactory.getInstance(), Address.SIZE_KNOWN_AT_COMPILE_TIME);
@@ -36,9 +38,16 @@ export class Address extends PayloadDataType {
         return type === 'address';
     }
 
-    public encodeValue(value: boolean): Buffer {
+    public encodeValue(value: string): Buffer {
+        if (value.startsWith('0x') === false) {
+            throw new Error(Address.ERROR_MESSAGE_ADDRESS_MUST_START_WITH_0X);
+        }
+        const valueAsBuffer = ethUtil.toBuffer(value);
+        if (valueAsBuffer.byteLength !== 20) {
+            throw new Error(Address.ERROR_MESSAGE_ADDRESS_MUST_BE_20_BYTES);
+        }
         const evmWordWidth = 32;
-        const encodedValueBuf = ethUtil.setLengthLeft(ethUtil.toBuffer(value), evmWordWidth);
+        const encodedValueBuf = ethUtil.setLengthLeft(valueAsBuffer, evmWordWidth);
         return encodedValueBuf;
     }
 

packages/utils/test/abi_encoder_test.ts

@@ -725,7 +725,7 @@ describe.only('ABI Encoder', () => {
         });
     });
 
-    describe('Array', () => {
+    describe.only('Array', () => {
         it('Fixed size; Static elements', async () => {
             // Create DataType object
             const testDataItem = { name: 'testArray', type: 'int[2]' };
@@ -793,6 +793,9 @@ describe.only('ABI Encoder', () => {
             const argsAsJson = JSON.stringify(args);
             expect(decodedArgsAsJson).to.be.equal(argsAsJson);
         });
+
+        // @TODO: Add test that fails if we pass in the wrong number of elements
+        // @TODO: Add test that fails if we pass in an element of incorrecrt type
     });
 
     describe.only('Tuple', () => {
@@ -849,22 +852,51 @@ describe.only('ABI Encoder', () => {
             const argsAsJson = JSON.stringify(args);
             expect(decodedArgsAsJson).to.be.equal(argsAsJson);
         });
+
+        // @TODO: Add test that fails if we pass in the wrong number of elements
+        // @TODO: Add test that fails if we pass in arguments in wrong order
+    });
+
+    describe.only('Address', () => {
+        it('Valid Address', async () => {
+            // Create DataType object
+            const testDataItem = { name: 'Address', type: 'address' };
+            const dataType = new AbiEncoder.Address(testDataItem);
+            // Construct args to be encoded
+            const args = '0xe41d2489571d322189246dafa5ebde1f4699f498';
+            // Encode Args and validate result
+            const encodedArgs = dataType.encode(args);
+            const expectedEncodedArgs = '0x000000000000000000000000e41d2489571d322189246dafa5ebde1f4699f498';
+            expect(encodedArgs).to.be.equal(expectedEncodedArgs);
+            // Decode Encoded Args and validate result
+            const decodedArgs = dataType.decode(encodedArgs);
+            const decodedArgsAsJson = JSON.stringify(decodedArgs);
+            const argsAsJson = JSON.stringify(args);
+            expect(decodedArgsAsJson).to.be.equal(argsAsJson);
+        });
+
+        it('Invalid Address - input is not valid hex', async () => {
+            // Create DataType object
+            const testDataItem = { name: 'Address', type: 'address' };
+            const dataType = new AbiEncoder.Address(testDataItem);
+            // Construct args to be encoded
+            const args = 'e4';
+            // Encode Args and validate result
+            expect(() => { dataType.encode(args) }).to.throw(AbiEncoder.Address.ERROR_MESSAGE_ADDRESS_MUST_START_WITH_0X);
+        });
+
+        it('Invalid Address - input is not 20 bytes', async () => {
+            // Create DataType object
+            const testDataItem = { name: 'Address', type: 'address' };
+            const dataType = new AbiEncoder.Address(testDataItem);
+            // Construct args to be encoded
+            const args = '0xe4';
+            // Encode Args and validate result
+            expect(() => { dataType.encode(args) }).to.throw(AbiEncoder.Address.ERROR_MESSAGE_ADDRESS_MUST_BE_20_BYTES);
+        });
     });
 
     /*
-    describe('Address', () => {
-        const testAddressDataItem = { name: 'testAddress', type: 'address' };
-        it('Valid Address', async () => {
-            const addressDataType = new AbiEncoder.Address(testAddressDataItem);
-            addressDataType.assignValue('0xe41d2489571d322189246dafa5ebde1f4699f498');
-            const expectedAbiEncodedAddress = '0x000000000000000000000000e41d2489571d322189246dafa5ebde1f4699f498';
-
-            console.log(addressDataType.getHexValue());
-            console.log(expectedAbiEncodedAddress);
-            expect(addressDataType.getHexValue()).to.be.equal(expectedAbiEncodedAddress);
-        });
-    });
-
     describe('Bool', () => {
         const testBoolDataItem = { name: 'testBool', type: 'bool' };
         it('True', async () => {