Block 21638
- Hash
00000020aa9d50e437f9a0cff9878d596f0017fa882ebf15797b435795b54560- Confirmations
- 20479
- Time
- 2026-10-13 02:10:43 UTC
- Median time
- 2026-10-13 02:01:23 UTC
- Transactions
- 1
- Size
- 2,772
- Weight
- 10,980
- Difficulty
- 0.0031405554
- Bits
1e013e69- Merkle root
2ec2091fb576ce0ffd8a5092bdd4da6b9b84e4741aae7af71f074c0d5e48fbe2- Previous block
- 00000114129c14d4bf4e5821915bc48ce4cf3fe4ca3105e5cff0e8f242a966cb
- Next block
- 0000001cb58bf52a427fd5aaaef11d8a6b90d50526bbe4fa94cf7114bcb41655
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 21638 is at or above the activation height 20000: nodes that enforce M2 accept a block there only with a valid ML-DSA-44 block signature.
The node behind this site enforces M2 and holds this block, so its block signature passed the node's check.
- Status
- In the form M2 requires, followed by the signet solution push (the classical signature)
- Signature
fba712dcb0054ef9aac13ff01b2d5a0d…(2420 B)- Format version
0x01- Context string
SIGNET/PQBLOCK/EXP0- Block key the nodes require
- SHA-256
eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad
Transactions
| txid | Inputs | Outputs | Amount | Fee |
|---|---|---|---|---|
| 2ec2091fb576…4c0d5e48fbe2 coinbase | 1 | 2 | 50 |