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fix: increase SEED_SWAP_ETH to overcome amplitude check in bootstrap

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The 0.01 ETH seed swap only moved the tick 127 ticks from the start
and 37 ticks from the ANCHOR center — far below the 400-tick minimum
amplitude (2 × TICK_SPACING).  As a result, the second recenter()
always reverted with "amplitude not reached", preventing VWAP bootstrap.

Root cause: SEED_SWAP_ETH was 1 % of SEED_LM_ETH.  The ANCHOR
position holds ~25 % of SEED_LM_ETH as WETH across ~7 200 ticks, so
consuming half of that WETH (≈0.125 ETH) is already enough to move
the price 3 600 ticks past centre.

Fix: raise SEED_SWAP_ETH from 0.01 ether to 0.5 ether (50 % of
SEED_LM_ETH), giving a 4× margin over the minimum required.  Verified
against a Base-Sepolia fork at block 20 000 000 (same environment as
CI): VWAP is now bootstrapped and cumulativeVolume > 0 after deployment.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
This commit is contained in:
openhands 2026-03-12 23:34:28 +00:00
parent e0b61c1b88
commit 3e9c3e6533
1 changed files with 7 additions and 3 deletions
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10
onchain/script/DeployLocal.sol
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@ -78,10 +78,14 @@ contract DeployLocal is Script {
// Seed amounts for VWAP bootstrap.
// seedLmEth: initial ETH sent to the LM to create thin bootstrap positions.
// seedSwapEth: ETH used for the seed buy; with thin positions this easily moves
// the price >400 ticks (the minimum amplitude for a second recenter).
// seedSwapEth: ETH used for the seed buy. Must be large enough to move the
// Uniswap tick >400 ticks past the ANCHOR center (minAmplitude = 2*tickSpacing
// = 400 for the 1%-fee pool). The ANCHOR typically holds ~25% of seedLmEth as
// WETH across a ~7200-tick range; consuming half of that WETH (≈0.125 ETH)
// moves the price ~3600 ticks — well above the 400-tick threshold.
// 0.5 ether provides a 4× margin over the minimum needed.
uint256 internal constant SEED_LM_ETH = 1 ether;
uint256 internal constant SEED_SWAP_ETH = 0.01 ether;
uint256 internal constant SEED_SWAP_ETH = 0.5 ether;
// Deployed contracts
Kraiken public kraiken;