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

Block 18517

Hash
00000018c43e43ca456555cf69ae5f6f705e7bb1431f8bd7e722ad85d3a638f7
Confirmations
22569
Time
2026-10-09 11:16:48 UTC
Median time
2026-10-09 11:08:33 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
3b400365d1222b785e0e55c25d50de828a3034a6a0fa33b71d3b33ca177a6de5
Previous block
000001195b515465f4fd783f379d22ba0b05d7d6b668b0abf6f91d69ceeb8081
Next block
0000008dae2657535ee31b5e88abd96ca50a9c11b401c16da615a69544d81527

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 18517 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
a6fec1cd148d27fb544b890d267a23b3… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
3b400365d122…33ca177a6de5 coinbase1250