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

Block 18722

Hash
0000007c9ecd963037a4d94290434814e6218bdb2597b434c8134d119f7cd0b3
Confirmations
23371
Time
2026-10-09 16:55:24 UTC
Median time
2026-10-09 16:46:23 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
ac041f0d3e35586a09c0c6dd2140f68d0d13a00b6426de8a4d6f5a6732b2de26
Previous block
0000008c39f396155e96a841d24d83a4a7239979e582217b812fd27ef8260d4c
Next block
00000080c57c8bc6bdc92bcf2100cf47d1ec1ea17fc0bef6188412628cf36df2

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 18722 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
86f3b6fe7e3f423c54a601e92dafec6b… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
ac041f0d3e35…5a6732b2de26 coinbase1250