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import ethUtil = require('ethereumjs-util');
import CommunicationChatBubbleOutline from 'material-ui/SvgIcon';
var _ = require('lodash');
export abstract class CalldataBlock {
private name: string;
private signature: string;
private offsetInBytes: number;
private headerSizeInBytes: number;
private bodySizeInBytes: number;
private relocatable: boolean;
private parentName: string;
constructor(name: string, signature: string, parentName: string, /*offsetInBytes: number,*/ headerSizeInBytes: number, bodySizeInBytes: number, relocatable: boolean) {
this.name = name;
this.signature = signature;
this.parentName = parentName;
this.offsetInBytes = 0;
this.headerSizeInBytes = headerSizeInBytes;
this.bodySizeInBytes = bodySizeInBytes;
this.relocatable = relocatable;
}
protected setHeaderSize(headerSizeInBytes: number) {
this.headerSizeInBytes = headerSizeInBytes;
}
protected setBodySize(bodySizeInBytes: number) {
this.bodySizeInBytes = bodySizeInBytes;
}
public getName(): string {
return this.name;
}
public getParentName(): string {
return this.parentName;
}
public getSignature(): string {
return this.signature;
}
public isRelocatable(): boolean {
return this.relocatable;
}
public getHeaderSizeInBytes(): number {
return this.headerSizeInBytes;
}
public getBodySizeInBytes(): number {
return this.bodySizeInBytes;
}
public getSizeInBytes(): number {
return this.headerSizeInBytes + this.bodySizeInBytes;
}
public getOffsetInBytes(): number {
return this.offsetInBytes;
}
public setOffset(offsetInBytes: number) {
this.offsetInBytes = offsetInBytes;
}
public abstract toBuffer(): Buffer;
}
export class PayloadCalldataBlock extends CalldataBlock {
private payload: Buffer;
constructor(name: string, signature: string, parentName: string, /*offsetInBytes: number,*/ relocatable: boolean, payload: Buffer) {
const headerSizeInBytes = 0;
const bodySizeInBytes = payload.byteLength;
super(name, signature, parentName, headerSizeInBytes, bodySizeInBytes, relocatable);
this.payload = payload;
}
public toBuffer(): Buffer {
return this.payload;
}
}
export class DependentCalldataBlock extends CalldataBlock {
public static DEPENDENT_PAYLOAD_SIZE_IN_BYTES = 32;
private parent: CalldataBlock;
private dependency: CalldataBlock;
constructor(name: string, signature: string, parentName: string, relocatable: boolean, dependency: CalldataBlock, parent: CalldataBlock) {
const headerSizeInBytes = 0;
const bodySizeInBytes = DependentCalldataBlock.DEPENDENT_PAYLOAD_SIZE_IN_BYTES;
super(name, signature, parentName, headerSizeInBytes, bodySizeInBytes, relocatable);
this.parent = parent;
this.dependency = dependency;
}
public toBuffer(): Buffer {
const dependencyOffset = this.dependency.getOffsetInBytes();
const parentOffset = this.parent.getOffsetInBytes();
const parentHeaderSize = this.parent.getHeaderSizeInBytes();
const pointer: number = dependencyOffset - (parentOffset + parentHeaderSize);
const pointerBuf = ethUtil.toBuffer(`0x${pointer.toString(16)}`);
const evmWordWidthInBytes = 32;
const pointerBufPadded = ethUtil.setLengthLeft(pointerBuf, evmWordWidthInBytes);
return pointerBufPadded;
}
public getDependency(): CalldataBlock {
return this.dependency;
}
}
export class MemberCalldataBlock extends CalldataBlock {
private static DEPENDENT_PAYLOAD_SIZE_IN_BYTES = 32;
private header: Buffer | undefined;
private members: CalldataBlock[];
private contiguous: boolean;
constructor(name: string, signature: string, parentName: string, relocatable: boolean, contiguous: boolean) {
super(name, signature, parentName, 0, 0, relocatable);
this.members = [];
this.header = undefined;
this.contiguous = contiguous;
}
public setMembers(members: CalldataBlock[]) {
let bodySizeInBytes = 0;
_.each(members, (member: CalldataBlock) => {
bodySizeInBytes += member.getSizeInBytes();
});
this.members = members;
this.setBodySize(0);
}
public isContiguous(): boolean {
return true;
}
public setHeader(header: Buffer) {
this.setHeaderSize(header.byteLength);
this.header = header;
}
public toBuffer(): Buffer {
if (this.header !== undefined) return this.header;
return new Buffer('');
}
public getMembers(): CalldataBlock[] {
return this.members;
}
}
class Queue<T> {
private store: T[] = [];
push(val: T) {
this.store.push(val);
}
pushFront(val: T) {
this.store.unshift(val);
}
pop(): T | undefined {
return this.store.shift();
}
merge(q: Queue<T>) {
this.store = this.store.concat(q.store);
}
mergeFront(q: Queue<T>) {
this.store = q.store.concat(this.store);
}
getStore(): T[] {
return this.store;
}
peek(): T | undefined {
return this.store.length >= 0 ? this.store[0] : undefined;
}
}
export class Calldata {
private selector: string;
private sizeInBytes: number;
private root: MemberCalldataBlock | undefined;
constructor() {
this.selector = '0x';
this.sizeInBytes = 0;
this.root = undefined;
}
private createQueue(memberBlock: MemberCalldataBlock): Queue<CalldataBlock> {
const blockQueue = new Queue<CalldataBlock>();
_.eachRight(memberBlock.getMembers(), (member: CalldataBlock) => {
if (member instanceof MemberCalldataBlock) {
blockQueue.mergeFront(this.createQueue(member));
} else {
blockQueue.pushFront(member);
}
});
// Children
_.each(memberBlock.getMembers(), (member: CalldataBlock) => {
if (member instanceof DependentCalldataBlock) {
const dependency = member.getDependency();
if (dependency instanceof MemberCalldataBlock) {
blockQueue.merge(this.createQueue(dependency));
} else {
blockQueue.push(dependency);
}
}
});
blockQueue.pushFront(memberBlock);
return blockQueue;
}
/*
// Basic optimize method that prunes duplicate branches of the tree
// Notes:
// 1. Pruning is at the calldata block level, so it is independent of type
// 2.
private optimize(blocks: CalldataBlock[]) {
// Build hash table of blocks
const blockLookupTable: { [key: string]: string } = {};
_.each(blocks, (block: CalldataBlock) => {
if (blocks instanceof DependentCalldataBlock === false) {
return;
}
const leavesHash = block.hashLeaves();
if (leavesHash in blockLookupTable) {
}
})
}*/
private generateAnnotatedHexString(): string {
let hexValue = `${this.selector}`;
if (this.root === undefined) {
throw new Error('expected root');
}
const valueQueue = this.createQueue(this.root);
let block: CalldataBlock | undefined;
let offset = 0;
const functionBlock = valueQueue.peek();
let functionName: string = functionBlock === undefined ? '' : functionBlock.getName();
while ((block = valueQueue.pop()) !== undefined) {
// Set f
// Process each block 1 word at a time
const size = block.getSizeInBytes();
const name = block.getName();
const parentName = block.getParentName();
console.log('*'.repeat(50), parentName, ' vs ', name);
//const ancestrialNamesOffset = name.startsWith('ptr<') ? 4 : 0;
//const parentOffset = name.lastIndexOf(parentName);
const prettyName = name.replace(`${parentName}.`, '').replace(`${functionName}.`, '');//.replace(`${parentName}[`, '[');
const signature = block.getSignature();
// Current offset
let offsetStr = '';
// If this block is empty then it's a newline
let value = '';
let nameStr = '';
let line = '';
if (size === 0) {
offsetStr = ' '.repeat(10);
value = ' '.repeat(74);
nameStr = `### ${prettyName.padEnd(80)}`;
line = `\n${offsetStr}${value}${nameStr}`;
} else {
offsetStr = `0x${offset.toString(16)}`.padEnd(10, ' ');
value = ethUtil.stripHexPrefix(ethUtil.bufferToHex(block.toBuffer().slice(0, 32))).padEnd(74);
if (block instanceof MemberCalldataBlock) {
nameStr = `### ${prettyName.padEnd(80)}`;
line = `\n${offsetStr}${value}${nameStr}`;
} else {
nameStr = ` ${prettyName.padEnd(80)}`;
line = `${offsetStr}${value}${nameStr}`;
}
}
for (let j = 32; j < size; j += 32) {
offsetStr = `0x${(offset + j).toString(16)}`.padEnd(10, ' ');
value = ethUtil.stripHexPrefix(ethUtil.bufferToHex(block.toBuffer().slice(j, j + 32))).padEnd(74);
nameStr = ' '.repeat(40);
line = `${line}\n${offsetStr}${value}${nameStr}`;
}
// Append to hex value
hexValue = `${hexValue}\n${line}`;
offset += size;
}
return hexValue;
}
private generateCondensedHexString(): string {
let selectorBuffer = ethUtil.toBuffer(this.selector);
if (this.root === undefined) {
throw new Error('expected root');
}
const valueQueue = this.createQueue(this.root);
const valueBufs: Buffer[] = [selectorBuffer];
let block: CalldataBlock | undefined;
while ((block = valueQueue.pop()) !== undefined) {
valueBufs.push(block.toBuffer());
}
const combinedBuffers = Buffer.concat(valueBufs);
const hexValue = ethUtil.bufferToHex(combinedBuffers);
return hexValue;
}
public toHexString(optimize: boolean = false, annotate: boolean = false): string {
if (this.root === undefined) {
throw new Error('expected root');
}
const offsetQueue = this.createQueue(this.root);
let block: CalldataBlock | undefined;
let offset = 0;
while ((block = offsetQueue.pop()) !== undefined) {
block.setOffset(offset);
offset += block.getSizeInBytes();
}
// if (optimize) this.optimize(valueQueue.getStore());
const hexValue = annotate ? this.generateAnnotatedHexString() : this.generateCondensedHexString();
return hexValue;
}
public getSelectorHex(): string {
return this.selector;
}
public getSizeInBytes(): number {
return this.sizeInBytes;
}
public toAnnotatedString(): string {
return "";
}
public setRoot(block: MemberCalldataBlock) {
this.root = block;
this.sizeInBytes += block.getSizeInBytes();
}
public setSelector(selector: string) {
// Ensure we have a 0x prefix
if (selector.startsWith('0x')) {
this.selector = selector;
} else {
this.selector = `$0x${selector}`;
}
// The selector must be 10 characters: '0x' followed by 4 bytes (two hex chars per byte)
if (this.selector.length !== 10) {
throw new Error(`Invalid selector '${this.selector}'`);
}
this.sizeInBytes += 8;
}
}
export class RawCalldata {
private value: Buffer;
private offset: number; // tracks current offset into raw calldata; used for parsing
private selector: string;
private scopes: Queue<number>;
constructor(value: string | Buffer) {
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
this.offset = 0;
this.scopes = new Queue<number>();
this.scopes.push(0);
}
public popBytes(lengthInBytes: number): Buffer {
const value = this.value.slice(this.offset, this.offset + lengthInBytes);
this.setOffset(this.offset + lengthInBytes);
return value;
}
public popWord(): Buffer {
const wordInBytes = 32;
return this.popBytes(wordInBytes);
}
public popWords(length: number): Buffer {
const wordInBytes = 32;
return this.popBytes(length * wordInBytes);
}
public readBytes(from: number, to: number): Buffer {
const value = this.value.slice(from, to);
return value;
}
public setOffset(offsetInBytes: number) {
this.offset = offsetInBytes;
console.log('0'.repeat(100), this.offset);
}
public startScope() {
this.scopes.pushFront(this.offset);
}
public endScope() {
this.scopes.pop();
}
public getOffset(): number {
return this.offset;
}
public toAbsoluteOffset(relativeOffset: number) {
const scopeOffset = this.scopes.peek();
if (scopeOffset === undefined) {
throw new Error(`Tried to access undefined scope.`);
}
const absoluteOffset = relativeOffset + scopeOffset;
return absoluteOffset;
}
public getSelector(): string {
return this.selector;
}
}
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