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-rw-r--r--packages/assert/src/index.ts3
1 files changed, 3 insertions, 0 deletions
diff --git a/packages/assert/src/index.ts b/packages/assert/src/index.ts
index f3b3651d5..95c7b658b 100644
--- a/packages/assert/src/index.ts
+++ b/packages/assert/src/index.ts
@@ -64,6 +64,9 @@ export const assert = {
this.assert(isWeb3Provider, this.typeAssertionMessage(variableName, 'Provider', value));
},
doesConformToSchema(variableName: string, value: any, schema: Schema, subSchemas?: Schema[]): void {
+ if (_.isUndefined(value)) {
+ throw new Error(`${variableName} can't be undefined`);
+ }
const schemaValidator = new SchemaValidator();
if (!_.isUndefined(subSchemas)) {
_.map(subSchemas, schemaValidator.addSchema.bind(schemaValidator));