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

Block 18888

Hash
000000e22d1bca1b033bfec3b04c6a11969eef2925d317313430fa9b2355a7bc
Confirmations
23062
Time
2026-10-09 21:30:19 UTC
Median time
2026-10-09 21:22:09 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
2c9521ce2c11b436b2e5c02b85659374e63c9f191d8c9198637879b65d3ffdf7
Previous block
0000000f1b94fcb39cf6782015c4e68a53ad635b9af3effa466ddd710db99ed9
Next block
0000002c59f36f90997632771d3ae321c7d6f4a7dd38ec9c35110c72e4d7b9eb

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 18888 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
2e4b47826e282c86f580bf8868637856… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
2c9521ce2c11…79b65d3ffdf7 coinbase1250