Ark-0
Ark-0 is a test network for trying things out. It may be reset at any time.

Block 19737

Hash
0000001aaebad4426b0c762e34838a132548e1d4c7e6cad96a5546ee345b45e6
Confirmations
22057
Time
2026-10-10 21:23:40 UTC
Median time
2026-10-10 21:14:33 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
4a5800dee0eec569d0aba15c81478654315c513fc6c036db8b2deb3a8927efae
Previous block
00000005d8b82501687c0c56eba0cd932f7e8498d5c19ea5f1ece13fbb6d641d
Next block
000001012d525128d9d8d80c09b66be50c54f468b08715ccd3eb017bea453c9f

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 19737 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
5d29a29eb4179eaadada31693eac0a09… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
4a5800dee0ee…eb3a8927efae coinbase1250