Would signature aggregation reduce the largest feasible blocksize

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If a Schnorr signature aggregation scheme were to be integrated into Bitcoin. Would the reduction in witness data versus non witness data (need less bytes for a signature therefore witness data usage would go down per tx) create a lower upper limit on potential blocksize (believe the realistic upper limit is 2.5 MB rn)?

Bertram Lund

Posted 2019-02-01T15:04:08.470

Reputation: 391

Answers

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SegWit blocks aren't limited in bytes anymore but rather in weight. The maximum weight for a block is 4M. The weight of non-witness data is 4x its number of bytes.

So, yes, decreasing the amount of signature-data frees up some weight which can then be filled by more transactions. Yet those new transactions also contain some non-witness data which is more costly. An average full block will still be 4M in weight, but reduced in size (bytes) while containing more transactions. Both are good news.

Jannes

Posted 2019-02-01T15:04:08.470

Reputation: 5 823