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151 lines
5.5 KiB
151 lines
5.5 KiB
## Remix Debug`
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[](https://www.npmjs.com/package/@remix-project/remix-debug)
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[](https://www.npmjs.com/package/@remix-project/remix-debug)
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[](https://www.npmjs.com/package/@remix-project/remix-debug)
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[](https://github.com/ethereum/remix-project/tree/master/libs/remix-debug)
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[](https://github.com/ethereum/remix-project/issues)
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`@remix-project/remix-debug` is a tool to debug Ethereum transactions on different Remix environments (VM, testnet etc.). It works underneath Remix IDE "DEBUGGER" plugin which is used to analyse step-to-step executioon of a transaction to debug it.
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### Installation
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`@remix-project/remix-debug` is an NPM package and can be installed using NPM as:
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`npm install @remix-project/remix-debug`
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### How to use
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`@remix-project/remix-debug` can be used as:
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```ts
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var Debugger = require('remix-debug').EthDebugger
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var BreakpointManager = require('remix-debug').BreakpointManager
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var debugger = new Debugger({
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compilationResult: () => {
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return compilationResult // that helps resolving source location
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}
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})
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debugger.addProvider(web3, 'web3')
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debugger.switchProvider('web3')
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var breakPointManager = new remixCore.code.BreakpointManager(this.debugger, (sourceLocation) => {
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// return offsetToLineColumn
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})
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debugger.setBreakpointManager(breakPointManager)
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breakPointManager.add({fileName, row})
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breakPointManager.add({fileName, row})
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debugger.debug(<tx_hash>)
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// this.traceManager.getCurrentCalledAddressAt
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debugger.event.register('newTraceLoaded', () => {
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// start doing basic stuff like retrieving step details
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debugger.traceManager.getCallStackAt(34, (error, callstack) => {})
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})
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debugger.callTree.register('callTreeReady', () => {
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// start doing more complex stuff like resolvng local variables
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breakPointManager.jumpNextBreakpoint(true)
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var storageView = debugger.storageViewAt(38, <contract address>,
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storageView.storageSlot(0, (error, storage) => {})
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storageView.storageRange(error, storage) => {}) // retrieve 0 => 1000 slots
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debugger.extractStateAt(23, (error, state) => {
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debugger.decodeStateAt(23, state, (error, decodedState) => {})
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})
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debugger.sourceLocationFromVMTraceIndex(<contract address>, 23, (error, location) => {
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debugger.decodeLocalsAt(23, location, (error, decodedlocals) => {})
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})
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debugger.extractLocalsAt(23, (null, locals) => {})
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})
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```
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It exports:
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```javascript
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{
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init,
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traceHelper,
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sourceMappingDecoder,
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EthDebugger,
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TransactionDebugger,
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BreakpointManager,
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SolidityDecoder,
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storage: {
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StorageViewer: StorageViewer,
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StorageResolver: StorageResolver
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},
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CmdLine
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}
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```
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Some of the class details are as:
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- - - -
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**BreakpointManager**
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`constructor({ traceManager, callTree, solidityProxy, locationToRowConverter })` : create new instance
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`jumpNextBreakpoint(defaultToLimit)` : start looking for the next breakpoint
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`jumpPreviousBreakpoint(defaultToLimit)` : start looking for the previous breakpoint
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`jump(direction, defaultToLimit)` : start looking for the previous or next breakpoint
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`hasBreakpointAtLine((fileIndex, line)` : check the given pair fileIndex/line against registered breakpoints
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`hasBreakpoint()` : return true if current manager has breakpoint
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`add(sourceLocation)` : add a new breakpoint to the manager
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`remove(sourceLocation)` : remove a breakpoint from the manager
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- - - -
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**StorageViewer**
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`constructor (_context, _storageResolver, _traceManager)` : create new instance
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`storageRange(defaultToLimit)` : return the storage for the current context (address and vm trace index)
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`storageSlot(defaultToLimit)` : return a slot value for the current context (address and vm trace index)
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`isComplete(direction, defaultToLimit)` : return True if the storage at @arg address is complete
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`initialMappingsLocation((fileIndex, line)` : return all the possible mappings locations for the current context (cached) do not return state changes during the current transaction
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`mappingsLocation()` : return all the possible mappings locations for the current context (cached) and current mapping slot. returns state changes during the current transaction
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`extractMappingsLocationChanges(sourceLocation)` : retrieve mapping location changes from the storage changes.
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- - - -
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**StorageResolver**
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`constructor (options)` : create new instance
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`storageRange(tx, stepIndex, address, callback)` : return the storage for the current context (address and vm trace index)
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`initialPreimagesMappings(tx, stepIndex, address, callback)` : return a slot value for the current context (address and vm trace index)
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`storageSlot(slot, tx, stepIndex, address, callback)` : return True if the storage at @arg address is complete
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`isComplete(address)` : return all the possible mappings locations for the current context (cached) do not return state changes during the current transaction
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### Contribute
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Please feel free to open an issue or a pull request.
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In case you want to add some code, do have a look to our contribution guidelnes [here](https://github.com/ethereum/remix-project/blob/master/CONTRIBUTING.md). Reach us on [Gitter](https://gitter.im/ethereum/remix) in case of any queries.
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### License
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MIT © 2018-21 Remix Team
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