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While there is no minimum BTC commitment enforced by the protocol, in practice, there's a floor constrained by [dust](https://unchained-capital.com/blog/dust-thermodynamics/)": basically, if the fees for a transaction exceed the value of the spent output, it's considered dust. How dust is [calculated](https://github.com/bitcoin/bitcoin/blob/master/src/policy/policy.cpp#L14) depends on a number of factors, we've found 5,500 satoshis to be good lower bound per [output](https://learnmeabitcoin.com/technical/output). Bitcoin transactions from Stacks miners contain two outputs (for Proof-of-Transfer), so a commitment of at least 11,000 satoshis / block is recommended. |
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While there is no minimum BTC commitment enforced by the protocol, in practice, there's a floor constrained by [dust](https://unchained-capital.com/blog/dust-thermodynamics/)": basically, if the fees for a transaction exceed the value of the spent output, it's considered dust. How dust is [calculated](https://github.com/bitcoin/bitcoin/blob/master/src/policy/policy.cpp#L14) depends on a number of factors, we've found 5,500 satoshis to be good lower bound per [output](https://learnmeabitcoin.com/technical/output). Bitcoin transactions from Stacks miners contain two outputs (for Proof-of-Transfer), so a commitment of at least 11,000 satoshis / block is recommended. |