diff --git a/.gitignore b/.gitignore
index 73a50607e..a66b74a8e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,10 +3,6 @@ yarn-debug.log*
 yarn-error.log*
 node.log
 
-# Core dumps
-core
-core.*
-
 # Dependency directories
 node_modules/
 .pnpm-store/
diff --git a/packages/toolshed/CHANGELOG.md b/packages/toolshed/CHANGELOG.md
index 94d9a2bbd..7ff041e76 100644
--- a/packages/toolshed/CHANGELOG.md
+++ b/packages/toolshed/CHANGELOG.md
@@ -1,5 +1,11 @@
 # @graphprotocol/toolshed
 
+## 1.0.3
+
+### Patch Changes
+
+- Add fn to parse custom errors to toolshed package
+
 ## 1.0.2
 
 ### Patch Changes
diff --git a/packages/toolshed/package.json b/packages/toolshed/package.json
index 66ae55965..d7cf8edb5 100644
--- a/packages/toolshed/package.json
+++ b/packages/toolshed/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@graphprotocol/toolshed",
-  "version": "1.0.2",
+  "version": "1.0.3",
   "publishConfig": {
     "access": "public"
   },
diff --git a/packages/toolshed/src/core/custom-errors.ts b/packages/toolshed/src/core/custom-errors.ts
new file mode 100644
index 000000000..2375afc2a
--- /dev/null
+++ b/packages/toolshed/src/core/custom-errors.ts
@@ -0,0 +1,31 @@
+import { getInterface } from '@graphprotocol/interfaces'
+import { ErrorDescription } from 'ethers'
+
+export function parseCustomError(error: string): string | null {
+  const interfaces = [
+    getInterface('HorizonStaking'),
+    getInterface('SubgraphService'),
+    getInterface('PaymentsEscrow'),
+    getInterface('GraphTallyCollector'),
+    getInterface('GraphPayments'),
+  ]
+
+  let decodedError: ErrorDescription | null = null
+  for (const iface of interfaces) {
+    decodedError = iface.parseError(error)
+    if (decodedError) {
+      break
+    }
+  }
+
+  if (!decodedError) {
+    return null
+  }
+
+  const argStrings = decodedError.fragment.inputs.map((input, i) => {
+    const value = decodedError.args[i]
+    return `${input.name}: ${value}`
+  })
+
+  return `${decodedError.name}(${argStrings.join(', ')})`
+}
diff --git a/packages/toolshed/src/core/index.ts b/packages/toolshed/src/core/index.ts
index d921cccc3..3934ed378 100644
--- a/packages/toolshed/src/core/index.ts
+++ b/packages/toolshed/src/core/index.ts
@@ -2,6 +2,7 @@ export * from './accounts'
 export * from './allocation'
 export * from './attestations'
 export * from './constants'
+export * from './custom-errors'
 export * from './disputes'
 export * from './graph-tally'
 export * from './poi'