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

Block 18989

Hash
000000895ed21d33b875bda8961c3b10448899ef2947cb866702a1162565ce2e
Confirmations
21938
Time
2026-10-10 00:21:00 UTC
Median time
2026-10-10 00:12:41 UTC
Transactions
2
Size
10,499
Weight
19,112
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
5c155afe19de44373a6065182d3f30b86c59bba05d0e08b2fb65dc945ccc0790
Previous block
000000fbe45a4a8cd10261bc5f6b1d42dbbe29b754cc1910b585da8149286363
Next block
000000aa4f2d08367c2901e41677321cbc5e5edc27eeccd055c50766412afa7c

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 18989 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
f5ed1e63d9d62a05209604244a8660a4… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
7db9a0fa9247…08146730fc2b coinbase1250.00004066
c17b922974b6…27655a1467cc spends P2MR pays to P2MR211.999956760.00004066