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

Block 18873

Hash
000001189e212ac661428de639d7c69a383186b3fa49dfc4e89676f642450e15
Confirmations
23559
Time
2026-10-09 21:04:34 UTC
Median time
2026-10-09 20:56:32 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
b41d8663274f9dc225bbce80bf6b373705e0dc6c6bf08cd40ab9b78235be1578
Previous block
000000ffedef1f60c227013d7990193b72000f64914b84342094f925fa3258b5
Next block
000000a64636a549c061422662c703ee5fd23ebb4a879cd1ca32bfd3d432d0d4

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 18873 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
909a2174b012377156bc376f2bf3d482… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
b41d8663274f…b78235be1578 coinbase1250