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

Block 18457

Hash
0000001c904226330312bc4ee1a1570d725715feb4146ffdab593b0c35773c39
Confirmations
22428
Time
2026-10-09 09:37:46 UTC
Median time
2026-10-09 09:29:12 UTC
Transactions
2
Size
2,977
Weight
11,596
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
2ac8b57c7103dfe9d266f277d48c56cd92762ac9143a57794f87d6f0dfdf3f77
Previous block
0000006bd9a20e9332d843cb333c1294d4c98467a0fe63effe231ae968d3aac6
Next block
000000213d78e3015c54d6cd500dd1c18f349c2c790aeb3a97f00433846b0a58

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 18457 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
6ecc10af06f2a6933f3bf50b55732cda… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
6379b890ba4d…9e1d7e277c68 coinbase1250.0000031
7dd075d0085b…afcbfbd02f1a pays to P2MR1220.99990680.0000031