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

Block 18040

Hash
000000c63c7e7c2c83baf329a5ada1a65c3670728a1288e81b4dd9994393aa34
Confirmations
23005
Time
2026-10-08 21:55:22 UTC
Median time
2026-10-08 21:46:53 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0040172004
Bits
1e00f8ed
Merkle root
3dbf49716a6c3772f7d88801279412fa354beb36d51a2c8e97d573031c1d1608
Previous block
0000005408edc5a994456243d1ce5624ea1c29bdd929a5d18fb46b4be347377b
Next block
000000a86e079ae8176dadd5407e095cac9250fce461e89c3f57f5b35d7a2414

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 18040 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
a191f497c0f69a729a0781616f11b28e… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
3dbf49716a6c…73031c1d1608 coinbase1250