diff --git a/src/mappings/v2/lock.ts b/src/mappings/v2/lock.ts
new file mode 100644
index 00000000..dc69c85b
--- /dev/null
+++ b/src/mappings/v2/lock.ts
@@ -0,0 +1,37 @@
+import { ensure } from '@kodadot1/metasquid'
+import { plsBe, real } from '@kodadot1/metasquid/consolidator'
+import { get } from '@kodadot1/metasquid/entity'
+import { Optional } from '@kodadot1/metasquid/types'
+
+import { CollectionEntity } from '../../model'
+import { unwrap } from '../utils'
+import { isOwnerOrElseError, withMeta } from '../utils/consolidator'
+import { getInteraction } from '../utils/getters'
+import logger, { logError } from '../utils/logger'
+import { Context, RmrkInteraction } from '../utils/types'
+
+
+export async function lockCollection(context: Context) {
+  let interaction: Optional<RmrkInteraction> = null
+
+  try {
+    const { value, caller } = unwrap(context, getInteraction);
+    interaction = value
+    plsBe(withMeta, interaction)
+    const collection = ensure<CollectionEntity>(
+      await get<CollectionEntity>(context.store, CollectionEntity, interaction.id)
+    )
+    plsBe<CollectionEntity>(real, collection)
+    isOwnerOrElseError(collection, caller)
+    // TODO: implement lock
+    // collection.max = 100
+    
+
+    logger.success(`[CHANGEISSUER] ${collection.id} from ${caller}`)
+    await context.store.save(collection)
+  } catch (e) {
+    logError(e, (e) =>
+      logger.warn(`[CHANGEISSUER] ${e.message} ${JSON.stringify(interaction)}`)
+    )
+  }
+}
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