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

Block 19857

Hash
00000045b9cc6862ced500180ef6a22fae0658200afbe612b3acc110d397df6c
Confirmations
22332
Time
2026-10-11 00:41:32 UTC
Median time
2026-10-11 00:33:26 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
2e2005b0e9ed2907449dfb9d415caab2c1c778cdad83d23173167a871ec1e9f4
Previous block
000000816ab3391b33d124e17846eda7b560b41c30f41d97ae63f8f765ecac14
Next block
000000dceea6b865c798885464d4df260e0f76b564499093fee01657c35a6422

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 19857 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
7c14ddd2d6b47f5f95a96dccf8d41510… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
2e2005b0e9ed…7a871ec1e9f4 coinbase1250