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

Block 18789

Hash
0000004d95383be379f22393c1d176eaf3682801b4afa536ea0b059993bb5b39
Confirmations
23563
Time
2026-10-09 18:46:13 UTC
Median time
2026-10-09 18:37:35 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
d0e559f7f3c4ebb2d31b89617ee16ee8438f5305ca5b0a4b70dca37635aaeebe
Previous block
0000008a964ef6b73c4702c3601d16cffaca6b2b51a0efd6d5839a18ff4f0dca
Next block
00000085d4ff8eba3d50cb2df0a2ecb66a90e4d5749d84c244ab6cea1e0e2da3

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 18789 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
734e1cee94241f6854642c7db98c5df2… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
d0e559f7f3c4…a37635aaeebe coinbase1250