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

Block 18890

Hash
000000c1d32376d360d2c8f42b8fa4bce571ca0ed854af09dce784030b6b2a09
Confirmations
22845
Time
2026-10-09 21:33:31 UTC
Median time
2026-10-09 21:25:14 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
7930c9f2e5e36d3e2a77fde61e7d04c03f566182cd58755547806295397e7ec9
Previous block
0000002c59f36f90997632771d3ae321c7d6f4a7dd38ec9c35110c72e4d7b9eb
Next block
000000d7ab132051166b3e9736354b49243bfe62ee557c51c7273be7e00428a7

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 18890 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
e1bfac9a0b894671eada9696ad560158… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
7930c9f2e5e3…6295397e7ec9 coinbase1250