InvalidChildkeyTake
Error v195 → v202, v205 → v212, v216 → v216, v217 → v219, v233 → v315, v320 → v326, v334 → v377, v385 → v393, v401 → current 7.71The child key take rate is outside the allowed range.
Why This Error Exists
Child key take is the percentage of rewards that flows from the child back to the parent. Like delegate take, it has governance-enforced bounds to prevent abuse. The range ensures children retain some rewards while parents get fair compensation for delegating their authority.
Deep Dive
ChildkeyTake is stored as basis points (u16, 0-10000). MinChildkeyTake and MaxChildkeyTake define the valid range. When a child earns rewards by setting weights, a portion (the take) goes to the parent. Setting take too low means parents get nothing; too high means children have no incentive to participate.
Debugging Example
You call set_childkey_take(netuid=1, hotkey=5Parent..., child=5Child..., take=50). Error: InvalidChildkeyTake. Query MinChildkeyTake - returns 100 (1%). Your 50 (0.5%) is below minimum. Solution: Set take >= 100. Call set_childkey_take(..., take=100) for minimum allowed.
Prevention Tips
- Query MinChildkeyTake and MaxChildkeyTake before setting take
- Remember take is in basis points: 100 = 1%, 1000 = 10%
- Document your child key take rates for transparency with child operators
From Chain Metadata
Childkey take is invalid.
What This Means
The child key take rate is outside the allowed range.
Common Causes
- Take below MinChildkeyTake
- Take above MaxChildkeyTake
How to Fix
- Check SubtensorModule.MinChildkeyTake and MaxChildkeyTake
- Set take within the allowed range
Storage to Check
Thrown By
Version History
Runtime Info
- Pallet Index
- 7
- Error Index
- 71
- Error Code
- 7.71
- Runtime Version
- v411