zakura

Zcash network upgrade

NU7 Dashboard

Zcash's next network upgrade is coming. Check this page for progress.

  • 25-second blocks Target spacing drops from 75 seconds to 25.
  • Steadier difficulty The averaging window widens from 17 blocks to 102.
  • Fees fund the NSM 60% of transaction fees accrue to the Network Sustainability Mechanism.
  • Sprout retirement The legacy Sprout shielded pool is suspended.

Rollout

  1. Staging Testnet V3 Shutdown
  2. Testnet Active
  3. Mainnet Active
Best block
3,563,199
00000000…63e2de90
Header time age
47 s
At the observation time below
Median interval
16.0 s
Last 300 intervals · 17.3 s median expected at the 25 s mean target
Difficulty
102623626.15
102-block averaging window
NSM fund balance
375.66 ZEC[?]ZEC is the Mainnet currency.
Observed reorgs · 24 h
1

HeightHashHeader time · UTC

  1. 3,563,1990000000001315dfb9d77a8669d842e0032b058d99059c17a8354962463e2de90
  2. 3,563,19800000000012090e3cb3a4aae643eb81c2fc52b317f14f32740786f0f5d96c47f
  3. 3,563,197000000000109aebdac76d4589b4eb1c9cb7bfab07e5ad041046bcb62c4983c75
  4. 3,563,19600000000008b97af114cbbecf2f86476dc750433a10a8183324fb413f3719cbe
  5. 3,563,19500000000008df3b7cd1785cd8753ee76714339f62d1d60d116f867f3488bba4a
  6. 3,563,194000000000096931bd8d45a5dfd446d1c31f91d3607c6a795860fc8a37d0e6eb2

Build-time observation ·

Run a node

Network magic
24e92764
NU7 activation height
3,543,405
NU7 branch ID
77190ad9

Join Mainnet with the matching revision and configuration. Keep Mainnet and Testnet databases separate and JSON-RPC bound to localhost.

Joining details captured · . Source: the operator's dashboard generation. Use standard Mainnet parameters. Mainnet uses real ZEC.

Latest block timestamp gap: 31. Minimum-difficulty eligible: false. Minimum-difficulty block: false.

Effective consensus parameters

Protocol reference d7b2e2cc4379e80ba66005f6e8aac33c75d06514 plus live node measurements; tip height 3563199. Minimum difficulty uses block timestamp gaps, not a wall-clock countdown.

ParameterAt tipNext block
Target block spacing25 seconds25 seconds
Minimum peer protocol version170,190170,190
NSM reissuance height8,939,6648,939,664
Coinbase maturity100 blocks100 blocks
Miner fee allocation40%40%
NSM fee allocation60%60%
NSM fee roundingRound down on the block aggregateRound down on the block aggregate
Difficulty averaging timespan2,550 seconds2,550 seconds
Difficulty averaging window102 blocks102 blocks
Difficulty damping factor44
Maximum difficulty adjustment down32%32%
Maximum difficulty adjustment up16%16%
Median time span11 blocks11 blocks
Minimum-difficulty gap multiplierNot applicable on MainnetNot applicable on Mainnet
Minimum-difficulty thresholdNot applicable on MainnetNot applicable on Mainnet
Minimum-difficulty comparisonNot applicable on MainnetNot applicable on Mainnet
Proof-of-work limit0007ffff000000000000000000000000000000000000000000000000000000000007ffff00000000000000000000000000000000000000000000000000000000
Proof-of-work limit (compact)1f07ffff1f07ffff
Global shielded action budget330330
Orchard actions per pool330330
Sapling spends and outputs300300
Sprout JoinSplits00
Parameter schema version11
NetworkMainnetMainnet
Network magic24e9276424e92764
Effective block height3,563,1993,563,200
Node build versionv1.8.4+14.g6fe707ad41v1.8.4+14.g6fe707ad41
NU7 activation height3,543,4053,543,405
Current consensus branch ID77190ad977190ad9
NU7 branch ID77190ad977190ad9
NU7 activeYesYes
Base block subsidy52,083,333 zatoshis52,083,333 zatoshis
  1. Build the matching revision

    Use d7b2e2cc4379e80ba66005f6e8aac33c75d06514. Build with cargo build --release --locked -p zakura.

  2. Save the configuration and start

    Save the configuration below as nu7-zakura.toml. Open inbound TCP port 8233 to accept peers. Check getblockchaininfo for the expected activation height and an advancing tip.

nu7-zakura.toml · matches the displayed networkDownload

[network]
network = "Mainnet"
listen_addr = "0.0.0.0:8233"

[rpc]
listen_addr = "127.0.0.1:8232"

[state]
cache_dir = "./nu7-mainnet-state"
storage_mode = "pruned"

start · from the directory containing the configuration

./target/release/zakurad -c nu7-zakura.toml start