From block 1500, every Block Zero block contributes a share of the block subsidy to the public Development & Growth Fund. The fund pays for infrastructure (seeds, pool, explorer, bridge), development, and growth initiatives.
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The fund is deducted from the existing 50 BLOZ block subsidy — no extra coins are created, total supply and emission stay exactly the same.
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Default contribution: 20% of the subsidy (10 BLOZ per block).
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Consensus minimum: 10%. Miners can lower their contribution to 15% or 10% with the
-devfundpercentoption:bitcoind -devfundpercent=15Values below 10 are raised to the consensus minimum automatically.
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Transaction fees are not touched — they go to the miner in full.
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Fund address (P2WPKH, watchable by everyone):
bz1qmv7lyweytwy807f6yq78zfvhh5ye5y2y0x2gfl
From block 1500, a coinbase that pays less than 10% of the subsidy to the
fund address is invalid (bad-cb-devfund) and will be rejected by upgraded
nodes. This is a coordinated flag-day upgrade like SegWit@413:
Every node and miner MUST upgrade to v1.0.0-rc11 (or later) before block 1500, otherwise it forks off the network.
getmininginfo shows the fund status (devfund object: active flag,
activation height, minimum and configured percentage, fund address).
getblocktemplate reports the required fund output (devfund: script +
value) for pool software; coinbasevalue is the miner share after the
deduction.
Nothing to do — the pool includes the fund output in the blocks it builds. Pool shares and payouts are unaffected; the deduction comes out of the block subsidy before payout distribution, like for solo miners.