From 2c974b5f3ffa0e9736000273e39cdeee4a251b94 Mon Sep 17 00:00:00 2001
From: Leonid Logvinov <logvinov.leon@gmail.com>
Date: Tue, 8 Jan 2019 12:23:33 +0100
Subject: Refactor out sol-cov, sol-profiler and sol-trace into their separate
 packages

---
 packages/sol-cov/src/trace.ts | 99 -------------------------------------------
 1 file changed, 99 deletions(-)
 delete mode 100644 packages/sol-cov/src/trace.ts

(limited to 'packages/sol-cov/src/trace.ts')

diff --git a/packages/sol-cov/src/trace.ts b/packages/sol-cov/src/trace.ts
deleted file mode 100644
index b38dbdce0..000000000
--- a/packages/sol-cov/src/trace.ts
+++ /dev/null
@@ -1,99 +0,0 @@
-import { logUtils } from '@0x/utils';
-import { OpCode, StructLog } from 'ethereum-types';
-import * as _ from 'lodash';
-
-import { utils } from './utils';
-
-export interface TraceByContractAddress {
-    [contractAddress: string]: StructLog[];
-}
-
-export function getTracesByContractAddress(structLogs: StructLog[], startAddress: string): TraceByContractAddress {
-    const traceByContractAddress: TraceByContractAddress = {};
-    let currentTraceSegment = [];
-    const addressStack = [startAddress];
-    if (_.isEmpty(structLogs)) {
-        return traceByContractAddress;
-    }
-    const normalizedStructLogs = utils.normalizeStructLogs(structLogs);
-    // tslint:disable-next-line:prefer-for-of
-    for (let i = 0; i < normalizedStructLogs.length; i++) {
-        const structLog = normalizedStructLogs[i];
-        if (structLog.depth !== addressStack.length - 1) {
-            throw new Error("Malformed trace. Trace depth doesn't match call stack depth");
-        }
-        // After that check we have a guarantee that call stack is never empty
-        // If it would: callStack.length - 1 === structLog.depth === -1
-        // That means that we can always safely pop from it
-        currentTraceSegment.push(structLog);
-
-        if (utils.isCallLike(structLog.op)) {
-            const currentAddress = _.last(addressStack) as string;
-            const jumpAddressOffset = 1;
-            const newAddress = utils.getAddressFromStackEntry(
-                structLog.stack[structLog.stack.length - jumpAddressOffset - 1],
-            );
-
-            // Sometimes calls don't change the execution context (current address). When we do a transfer to an
-            // externally owned account - it does the call and immediately returns because there is no fallback
-            // function. We manually check if the call depth had changed to handle that case.
-            const nextStructLog = normalizedStructLogs[i + 1];
-            if (nextStructLog.depth !== structLog.depth) {
-                addressStack.push(newAddress);
-                traceByContractAddress[currentAddress] = (traceByContractAddress[currentAddress] || []).concat(
-                    currentTraceSegment,
-                );
-                currentTraceSegment = [];
-            }
-        } else if (utils.isEndOpcode(structLog.op)) {
-            const currentAddress = addressStack.pop() as string;
-            traceByContractAddress[currentAddress] = (traceByContractAddress[currentAddress] || []).concat(
-                currentTraceSegment,
-            );
-            currentTraceSegment = [];
-            if (structLog.op === OpCode.SelfDestruct) {
-                // After contract execution, we look at all sub-calls to external contracts, and for each one, fetch
-                // the bytecode and compute the coverage for the call. If the contract is destroyed with a call
-                // to `selfdestruct`, we are unable to fetch it's bytecode and compute coverage.
-                // TODO: Refactor this logic to fetch the sub-called contract bytecode before the selfdestruct is called
-                // in order to handle this edge-case.
-                logUtils.warn(
-                    "Detected a selfdestruct. Sol-cov currently doesn't support that scenario. We'll just skip the trace part for a destructed contract",
-                );
-            }
-        } else if (structLog.op === OpCode.Create) {
-            // TODO: Extract the new contract address from the stack and handle that scenario
-            logUtils.warn(
-                "Detected a contract created from within another contract. Sol-cov currently doesn't support that scenario. We'll just skip that trace",
-            );
-            return traceByContractAddress;
-        } else {
-            if (structLog !== _.last(normalizedStructLogs)) {
-                const nextStructLog = normalizedStructLogs[i + 1];
-                if (nextStructLog.depth === structLog.depth) {
-                    continue;
-                } else if (nextStructLog.depth === structLog.depth - 1) {
-                    const currentAddress = addressStack.pop() as string;
-                    traceByContractAddress[currentAddress] = (traceByContractAddress[currentAddress] || []).concat(
-                        currentTraceSegment,
-                    );
-                    currentTraceSegment = [];
-                } else {
-                    throw new Error('Malformed trace. Unexpected call depth change');
-                }
-            }
-        }
-    }
-    if (addressStack.length !== 0) {
-        logUtils.warn('Malformed trace. Call stack non empty at the end');
-    }
-    if (currentTraceSegment.length !== 0) {
-        const currentAddress = addressStack.pop() as string;
-        traceByContractAddress[currentAddress] = (traceByContractAddress[currentAddress] || []).concat(
-            currentTraceSegment,
-        );
-        currentTraceSegment = [];
-        logUtils.warn('Malformed trace. Current trace segment non empty at the end');
-    }
-    return traceByContractAddress;
-}
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