Block 19421
- Hash
0000004ac1961ac9096e3726db63ba61bc7d87300eb59f2931a451695108adb3- Confirmations
- 21807
- Time
- 2026-10-10 12:31:16 UTC
- Median time
- 2026-10-10 12:23:26 UTC
- Transactions
- 1
- Size
- 2,772
- Weight
- 10,980
- Difficulty
- 0.0035089589
- Bits
1e011cfb- Merkle root
767599171ea25f7ff4b24723b08b7ec7c7158123d5b82c59e71e1bfc420a8d0c- Previous block
- 00000063c7ce7e7a975739316dc4b4a8f44481c29d4a9a9424da367ed5e2497c
- Next block
- 000000d0752869459511a14293a0e1a7dc2c3a8de675f91ae9b910ae3f56828e
ML-DSA-44 block signature (M2)
M2 is an experimental rule of this test network. From a height set in its build, a node that enforces M2 accepts a block only if, besides the classical signet signature, the block carries a valid ML-DSA-44 signature by the Ark-0 block key, in its coinbase's witness commitment output. This page shows that signature; it does not check it.
Block 19421 is below the activation height 20000: nodes do not require this signature, and only log the result of checking it when run with -debug=validation. The block producer adds it from height 18000 on, so that nodes can check it before it is required.
- Status
- In the form M2 requires, followed by the signet solution push (the classical signature)
- Signature
7587c3af5e1ce5ed93c1e44965cb6c06…(2420 B)- Format version
0x01- Context string
SIGNET/PQBLOCK/EXP0- Block key the nodes require
- SHA-256
eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad
Transactions
| txid | Inputs | Outputs | Amount | Fee |
|---|---|---|---|---|
| 767599171ea2…1bfc420a8d0c coinbase | 1 | 2 | 50 |