feat!: use .name property for errors instead of .code (#315)

Refactors thrown errors to have a `.name` property that describes the type of error, e.g. `NotFoundError` instead of a `.code` property like `ERR_NOT_FOUND`.

This is more ideomatic JavaScript as `.code` is largely inherited from errors thrown by Node.js's fs module whereas `.name` reflects the [function (e.g. constructor) name](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/name) of the error.

Also removes the `err-code` dependency which is another CJS dep down.

BREAKING CHANGE: To detect the type of error thrown, use `.name` instead of `.code`

Author: achingbrain

packages/blockstore-core/package.json

@@ -98,7 +98,6 @@
   },
   "dependencies": {
     "@libp2p/logger": "^4.0.6",
-    "err-code": "^3.0.1",
     "interface-blockstore": "^5.0.0",
     "interface-store": "^5.0.0",
     "it-drain": "^3.0.5",

packages/blockstore-core/src/black-hole.ts

@@ -1,5 +1,5 @@
+import { NotFoundError } from 'interface-store'
 import { BaseBlockstore } from './base.js'
-import * as Errors from './errors.js'
 import type { Pair } from 'interface-blockstore'
 import type { Await, AwaitIterable } from 'interface-store'
 import type { CID } from 'multiformats/cid'
@@ -10,7 +10,7 @@ export class BlackHoleBlockstore extends BaseBlockstore {
   }
 
   get (): Await<Uint8Array> {
-    throw Errors.notFoundError()
+    throw new NotFoundError()
   }
 
   has (): Await<boolean> {

packages/blockstore-core/src/errors.ts

@@ -1,5 +1,5 @@
+import { NotFoundError } from 'interface-store'
 import { BaseBlockstore } from './base.js'
-import { Errors } from './index.js'
 import type { Blockstore, Pair } from 'interface-blockstore'
 import type { AbortOptions, Await, AwaitIterable } from 'interface-store'
 import type { CID } from 'multiformats/cid'
@@ -34,7 +34,7 @@ export class IdentityBlockstore extends BaseBlockstore {
     }
 
     if (this.child == null) {
-      throw Errors.notFoundError()
+      throw new NotFoundError()
     }
 
     return this.child.get(key)

packages/blockstore-core/src/identity.ts

@@ -82,13 +82,7 @@
  * ```
  */
 
-import * as ErrorsImport from './errors.js'
-
 export { BaseBlockstore } from './base.js'
 export { MemoryBlockstore } from './memory.js'
 export { BlackHoleBlockstore } from './black-hole.js'
 export { TieredBlockstore } from './tiered.js'
-
-export const Errors = {
-  ...ErrorsImport
-}

packages/blockstore-core/src/index.ts

@@ -1,9 +1,9 @@
+import { NotFoundError } from 'interface-store'
 import { base32 } from 'multiformats/bases/base32'
 import { CID } from 'multiformats/cid'
 import * as raw from 'multiformats/codecs/raw'
 import * as Digest from 'multiformats/hashes/digest'
 import { BaseBlockstore } from './base.js'
-import * as Errors from './errors.js'
 import type { Pair } from 'interface-blockstore'
 import type { Await, AwaitIterable } from 'interface-store'
 
@@ -26,7 +26,7 @@ export class MemoryBlockstore extends BaseBlockstore {
     const buf = this.data.get(base32.encode(key.multihash.bytes))
 
     if (buf == null) {
-      throw Errors.notFoundError()
+      throw new NotFoundError()
     }
 
     return buf

packages/blockstore-core/src/memory.ts

@@ -1,10 +1,10 @@
 import { logger } from '@libp2p/logger'
+import { DeleteFailedError, NotFoundError, PutFailedError } from 'interface-store'
 import drain from 'it-drain'
 import filter from 'it-filter'
 import merge from 'it-merge'
 import { pushable } from 'it-pushable'
 import { BaseBlockstore } from './base.js'
-import * as Errors from './errors.js'
 import type { Blockstore, Pair } from 'interface-blockstore'
 import type { AbortOptions, AwaitIterable } from 'interface-store'
 import type { CID } from 'multiformats/cid'
@@ -31,7 +31,7 @@ export class TieredBlockstore extends BaseBlockstore {
       await Promise.all(this.stores.map(async store => { await store.put(key, value, options) }))
       return key
     } catch (err: any) {
-      throw Errors.putFailedError(err)
+      throw new PutFailedError(String(err))
     }
   }
 
@@ -44,7 +44,7 @@ export class TieredBlockstore extends BaseBlockstore {
         log.error(err)
       }
     }
-    throw Errors.notFoundError()
+    throw new NotFoundError()
   }
 
   async has (key: CID, options?: AbortOptions): Promise<boolean> {
@@ -61,7 +61,7 @@ export class TieredBlockstore extends BaseBlockstore {
     try {
       await Promise.all(this.stores.map(async store => { await store.delete(key, options) }))
     } catch (err: any) {
-      throw Errors.deleteFailedError(err)
+      throw new DeleteFailedError(String(err))
     }
   }
 

packages/blockstore-core/src/tiered.ts

@@ -76,7 +76,6 @@
     "dep-check": "aegir dep-check"
   },
   "dependencies": {
-    "blockstore-core": "^4.0.0",
     "fast-write-atomic": "^0.2.1",
     "interface-blockstore": "^5.0.0",
     "interface-store": "^5.0.0",

packages/blockstore-fs/package.json

@@ -15,17 +15,15 @@
 import fs from 'node:fs/promises'
 import path from 'node:path'
 import { promisify } from 'node:util'
-import {
-  Errors
-} from 'blockstore-core'
 // @ts-expect-error no types
 import fwa from 'fast-write-atomic'
+import { OpenFailedError, type AwaitIterable, PutFailedError, NotFoundError, DeleteFailedError } from 'interface-store'
 import glob from 'it-glob'
 import map from 'it-map'
 import parallelBatch from 'it-parallel-batch'
-import { NextToLast, type ShardingStrategy } from './sharding.js'
+import { NextToLast } from './sharding.js'
+import type { ShardingStrategy } from './sharding.js'
 import type { Blockstore, Pair } from 'interface-blockstore'
-import type { AwaitIterable } from 'interface-store'
 import type { CID } from 'multiformats/cid'
 
 const writeAtomic = promisify(fwa)
@@ -122,15 +120,15 @@ export class FsBlockstore implements Blockstore {
       await fs.access(this.path, fs.constants.F_OK | fs.constants.W_OK)
 
       if (this.errorIfExists) {
-        throw Errors.openFailedError(new Error(`Blockstore directory: ${this.path} already exists`))
+        throw new OpenFailedError(`Blockstore directory: ${this.path} already exists`)
       }
     } catch (err: any) {
       if (err.code === 'ENOENT') {
         if (this.createIfMissing) {
           await fs.mkdir(this.path, { recursive: true })
           return
         } else {
-          throw Errors.openFailedError(new Error(`Blockstore directory: ${this.path} does not exist`))
+          throw new OpenFailedError(`Blockstore directory: ${this.path} does not exist`)
         }
       }
 
@@ -156,7 +154,7 @@ export class FsBlockstore implements Blockstore {
 
       return key
     } catch (err: any) {
-      throw Errors.putFailedError(err)
+      throw new PutFailedError(String(err))
     }
   }
 
@@ -179,7 +177,7 @@ export class FsBlockstore implements Blockstore {
     try {
       return await fs.readFile(path.join(this.path, dir, file))
     } catch (err: any) {
-      throw Errors.notFoundError(err)
+      throw new NotFoundError(String(err))
     }
   }
 
@@ -207,7 +205,7 @@ export class FsBlockstore implements Blockstore {
         return
       }
 
-      throw Errors.deleteFailedError(err)
+      throw new DeleteFailedError(String(err))
     }
   }
 

packages/blockstore-fs/src/index.ts

@@ -1,4 +1,3 @@
-/* eslint-env mocha */
 import fs from 'node:fs/promises'
 import os from 'node:os'
 import path from 'node:path'
@@ -44,7 +43,7 @@ describe('FsBlockstore', () => {
       const dir = path.join(os.tmpdir(), `test-${Math.random()}`)
       const store = new FsBlockstore(dir, { createIfMissing: false })
       await expect(store.open()).to.eventually.be.rejected
-        .with.property('code', 'ERR_OPEN_FAILED')
+        .with.property('name', 'OpenFailedError')
     })
 
     it('errorIfExists: true - folder exists', async () => {
@@ -54,7 +53,7 @@ describe('FsBlockstore', () => {
       })
       const store = new FsBlockstore(dir, { errorIfExists: true })
       await expect(store.open()).to.eventually.be.rejected
-        .with.property('code', 'ERR_OPEN_FAILED')
+        .with.property('name', 'OpenFailedError')
     })
   })
 
@@ -68,7 +67,7 @@ describe('FsBlockstore', () => {
     await fs.delete(key)
 
     await expect(fs.get(key)).to.eventually.be.rejected
-      .with.property('code', 'ERR_NOT_FOUND')
+      .with.property('name', 'NotFoundError')
   })
 
   it('deleting non-existent files', async () => {
@@ -81,7 +80,7 @@ describe('FsBlockstore', () => {
     await fs.delete(key)
 
     await expect(fs.get(key)).to.eventually.be.rejected
-      .with.property('code', 'ERR_NOT_FOUND')
+      .with.property('name', 'NotFoundError')
   })
 
   describe('interface-blockstore (flat directory)', () => {