Metamask Extension P0 Investigate And Cap Multichain Account Creation/Syncing Span Fan-Out

Metamask Extension P0 Investigate And Cap Multichain Account Creation/Syncing Span FanOut Symptom Users experience errors when creating or syncing multichain accounts in Metamask, resulting in excessive span fanout and potential crashes. Technical Root Cause The issue arises from the extension's inability to efficiently handle the creation and syncing of multiple chain accounts, leading to a surge in concurrent requests and subsequent timeouts. Manual Overrides To mitigate this issue, users can attempt the following manual overrides: Reduce the number of chain accounts being synced simultaneously Increase the timeout threshold for account creation and syncing requests Utilize a custom configuration to limit the span fanout, as shown in the example below: json { "multichain": { "accountCreation": { "maxConcurrentRequests": 5 }, "accountSyncing": { "timeout": 30000 } } } Consider using an external console to finetune these settings for optimal performance. Prerequisites Metamask extension installed and configured Ethereum network connection established Basic understanding of JSON configuration files

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