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

Block 18791

Hash
00000039fd8f2d72800d9867f2d5068de7a1867107996c175c419c8a5072a0a2
Confirmations
23571
Time
2026-10-09 18:49:17 UTC
Median time
2026-10-09 18:41:13 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
d7fd21642c2dd46c4d4fb80bffaa96f794874a7aae48f51e1be6e243da9d21b2
Previous block
00000085d4ff8eba3d50cb2df0a2ecb66a90e4d5749d84c244ab6cea1e0e2da3
Next block
00000015c3bc024085da42249d471f9c6746aa1d3ad7eb9e4b52c82f3935fbd5

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 18791 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
fb203d91e60c5ffcf07f4d5932bee7bc… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
d7fd21642c2d…e243da9d21b2 coinbase1250