Use new ABI Encoder for contracts

packages/utils/src/abi_encoder/calldata.ts

@@ -456,13 +456,19 @@ export class RawCalldata {
     private selector: string;
     private scopes: Queue<number>;
 
-    constructor(value: string | Buffer) {
+    constructor(value: string | Buffer, hasSelectorPrefix: boolean = true) {
         if (typeof value === 'string' && !value.startsWith('0x')) {
             throw new Error(`Expected raw calldata to start with '0x'`);
         }
         const valueBuf = ethUtil.toBuffer(value);
-        this.selector = ethUtil.bufferToHex(valueBuf.slice(0, 4));
-        this.value = valueBuf.slice(4); // disregard selector
+        if (hasSelectorPrefix) {
+            this.selector = ethUtil.bufferToHex(valueBuf.slice(0, 4));
+            this.value = valueBuf.slice(4); // disregard selector
+        } else {
+            this.selector = '0x';
+            this.value = valueBuf;
+        }
+
         this.offset = 0;
         this.scopes = new Queue<number>();
         this.scopes.push(0);

packages/utils/src/abi_encoder/data_type.ts

@@ -6,7 +6,7 @@ import ethUtil = require('ethereumjs-util');
 var _ = require('lodash');
 
 export interface DataTypeFactory {
-    create: (dataItem: DataItem, parentDataType: DataType) => DataType;
+    create: (dataItem: DataItem, parentDataType?: DataType) => DataType;
     mapDataItemToDataType: (dataItem: DataItem) => DataType;
 }
 

packages/utils/src/abi_encoder/evm_data_types.ts

@@ -106,7 +106,8 @@ abstract class Number extends PayloadDataType {
         }
     }
 
-    public encodeValue(value: BigNumber): Buffer {
+    public encodeValue(value_: BigNumber | string | number): Buffer {
+        const value = new BigNumber(value_, 10);
         if (value.greaterThan(this.getMaxValue())) {
             throw `tried to assign value of ${value}, which exceeds max value of ${this.getMaxValue()}`;
         } else if (value.lessThan(this.getMinValue())) {
@@ -465,6 +466,7 @@ export class SolArray extends MemberDataType {
 export class Method extends MemberDataType {
     private methodSignature: string;
     private methodSelector: string;
+    private returnDataTypes: DataType[];
 
     // TMP
     public selector: string;
@@ -473,7 +475,11 @@ export class Method extends MemberDataType {
         super({ type: 'method', name: abi.name, components: abi.inputs }, EvmDataTypeFactory.getInstance());
         this.methodSignature = this.computeSignature();
         this.selector = this.methodSelector = this.computeSelector();
-
+        this.returnDataTypes = [];
+        const dummy = new Byte({ type: 'byte', name: 'DUMMY' }); // @TODO TMP
+        _.each(abi.outputs, (dataItem: DataItem) => {
+            this.returnDataTypes.push(this.getFactory().create(dataItem, dummy));
+        });
     }
 
     private computeSignature(): string {
@@ -501,6 +507,23 @@ export class Method extends MemberDataType {
         return value;
     }
 
+    public decodeReturnValues(returndata: string, rules?: DecodingRules): any {
+        //console.log('O'.repeat(100), '\n', returndata, '\n', this.returnDataTypes, 'P'.repeat(100));
+
+        const returnValues: any[] = [];
+        const rules_ = rules ? rules : { structsAsObjects: false } as DecodingRules;
+        const rawReturnData = new RawCalldata(returndata, false);
+        _.each(this.returnDataTypes, (dataType: DataType) => {
+            returnValues.push(dataType.generateValue(rawReturnData, rules_));
+        });
+
+        //console.log('*'.repeat(40), '\n', JSON.stringify(returnValues), '\n', '*'.repeat(100));
+        /*if (returnValues.length === 1) {
+            return returnValues[0];
+        }*/
+        return returnValues;
+    }
+
     public getSignature(): string {
         return this.methodSignature;
     }
@@ -538,12 +561,15 @@ export class EvmDataTypeFactory implements DataTypeFactory {
         throw new Error(`Unrecognized data type: '${dataItem.type}'`);
     }
 
-    public create(dataItem: DataItem, parentDataType: DataType): DataType {
+    public create(dataItem: DataItem, parentDataType?: DataType): DataType {
         const dataType = this.mapDataItemToDataType(dataItem);
         if (dataType.isStatic()) {
             return dataType;
         }
 
+        if (parentDataType === undefined) { // @Todo -- will this work for return values?
+            throw new Error(`Trying to create a pointer`);
+        }
         const pointer = new Pointer(dataType, parentDataType);
         return pointer;
     }

packages/utils/test/abi_encoder_test.ts

@@ -15,6 +15,35 @@ describe.only('ABI Encoder', () => {
 
     describe.only('ABI Tests at Method Level', () => {
 
+        it.only('Should reuse duplicated strings in string array', async () => {
+            const method = new AbiEncoder.Method(AbiSamples.GAbi);
+
+            const args = [
+                {
+                    a: new BigNumber(5),
+                    e: '0x616161',
+                    b: 'aaa',
+                    f: '0xe41d2489571d322189246dafa5ebde1f4699f498'
+                }
+            ]
+
+            // Verify optimized calldata is expected
+            const optimizedCalldata = method.encode(args, { optimize: true });
+            //const expectedOptimizedCalldata = '0x13e751a900000000000000000000000000000000000000000000000000000000000000200000000000000000000000000000000000000000000000000000000000000004000000000000000000000000000000000000000000000000000000000000008000000000000000000000000000000000000000000000000000000000000000c0000000000000000000000000000000000000000000000000000000000000008000000000000000000000000000000000000000000000000000000000000000c0000000000000000000000000000000000000000000000000000000000000000b5465737420537472696e67000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000d5465737420537472696e67203200000000000000000000000000000000000000';
+            //expect(optimizedCalldata).to.be.equal(expectedOptimizedCalldata);
+
+            // Verify args decode properly
+            const decodedArgs = method.decode(optimizedCalldata);
+            const decodedArgsJson = JSON.stringify(decodedArgs);
+            const argsJson = JSON.stringify(args);
+            //expect(decodedArgsJson).to.be.equal(argsJson);
+
+            console.log(method.getSignature());
+            console.log('*'.repeat(100), '\n', method.encode(args, { optimize: true, annotate: true }), '\n', '*'.repeat(100));
+            console.log('*'.repeat(100), '\n', method.encode(args, { optimize: true }), '\n', '*'.repeat(100));
+
+        });
+
         it('Should reuse duplicated strings in string array', async () => {
             const method = new AbiEncoder.Method(AbiSamples.stringAbi);
             const strings = [

packages/utils/test/abi_samples.ts

@@ -34,6 +34,40 @@ export const stringAbi = {
     type: 'function',
 } as MethodAbi;
 
+
+export const GAbi = {
+    constant: false,
+    inputs: [
+        {
+            components: [{
+                name: 'a',
+                type: 'uint256',
+            },
+            {
+                name: 'b',
+                type: 'string',
+            },
+            {
+                name: 'e',
+                type: 'bytes',
+            },
+            {
+                name: 'f',
+                type: 'address',
+            }],
+
+            name: 'f',
+            type: 'tuple',
+
+        }
+    ],
+    name: 'simpleFunction',
+    outputs: [],
+    payable: false,
+    stateMutability: 'nonpayable',
+    type: 'function',
+} as MethodAbi;
+
 export const optimizerAbi2 = {
     constant: false,
     inputs: [