diag: add script to verify all UniV3 pool health on mainnet

[vishalchangrani]

Summary

• Adds cadence/scripts/diag_verify_pools.cdc — verifies all 8 Uniswap V3 pools required by FlowYieldVaultsStrategiesV2 are correctly set up on mainnet
• Adds cadence/scripts/diag_evm_token_balances.cdc — checks balances of all relevant tokens at any EVM address
• Adds cadence/scripts/diag_vault_prices.cdc — reports the redemption price of syWFLOWv and FUSDEV ERC4626 vaults in both their underlying token and in USD (via Band Protocol oracle)

For each pool diag_verify_pools checks: exists, initialized, hasLiquidity, and token reserves in human-readable units and raw wei.

Pools checked

#	Pool	Fee	Purpose
1	MOET / PYUSD0	100	Pre-swap: PYUSD0 collateral → MOET for FlowALP
2	FUSDEV / PYUSD0	100	FUSDEVStrategy yield token ↔ stablecoin
3	syWFLOWv / WFLOW	100	syWFLOWvStrategy yield token ↔ WFLOW
4	PYUSD0 / WFLOW	3000	FUSDEVStrategy FLOW collateral exit path
5	PYUSD0 / WETH	3000	FUSDEVStrategy WETH collateral exit path
6	PYUSD0 / WBTC	3000	FUSDEVStrategy WBTC collateral exit path
7	WFLOW / WETH	3000	syWFLOWvStrategy WETH/WBTC collateral first hop
8	WETH / WBTC	3000	syWFLOWvStrategy WBTC collateral second hop

Usage

diag_verify_pools.cdc — check all pool health

flow scripts execute cadence/scripts/diag_verify_pools.cdc --network mainnet

Sample output (mainnet, 2026-03-11)

{
  "1_moet_pyusd0_fee100": {
    "label": "MOET / PYUSD0  fee=100  [pre-swap: PYUSD0 collateral → MOET for FlowALP]",
    "poolAddress": "863b8bf842a7205e55896e518869e9f29a9a35af",
    "exists": true, "initialized": true, "hasLiquidity": true,
    "liquidity": 19999026440649,
    "MOET_balance": 19.89200582,  "MOET_balance_wei": 19892005825342628491,
    "PYUSD0_balance": 30022.35759300, "PYUSD0_balance_wei": 30022357593
  },
  "2_fusdev_pyusd0_fee100": {
    "label": "FUSDEV / PYUSD0  fee=100  [FUSDEVStrategy: yield token ↔ stablecoin]",
    "poolAddress": "9196e243b7562b0866309013f2f9eb63f83a690f",
    "exists": true, "initialized": true, "hasLiquidity": true,
    "liquidity": 28466223307593777194,
    "FUSDEV_balance": 115073.55934541, "FUSDEV_balance_wei": 115073559345419056595870,
    "PYUSD0_balance": 144238.86303100, "PYUSD0_balance_wei": 144238863031
  },
  "3_sywflowv_wflow_fee100": {
    "label": "syWFLOWv / WFLOW  fee=100  [syWFLOWvStrategy: yield token ↔ WFLOW]",
    "poolAddress": "9ea72f7fe981eef7e6458beb02a977f27a48f4f9",
    "exists": true, "initialized": true, "hasLiquidity": true,
    "liquidity": 696762855537495765389412480,
    "syWFLOWv_balance": 609667.49593107, "syWFLOWv_balance_wei": 60966749593107692000166833,
    "WFLOW_balance": 2235808.69809952,   "WFLOW_balance_wei": 2235808698099520052337437
  },
  "4_pyusd0_wflow_fee3000": {
    "label": "PYUSD0 / WFLOW  fee=3000  [FUSDEVStrategy: FLOW collateral exit path]",
    "poolAddress": "0fdba612fea7a7ad0256687eebf056d81ca63f63",
    "exists": true, "initialized": true, "hasLiquidity": true,
    "liquidity": 861334314456052813,
    "PYUSD0_balance": 305980.65294200, "PYUSD0_balance_wei": 305980652942,
    "WFLOW_balance": 5270219.00060394, "WFLOW_balance_wei": 5270219000603940932099398
  },
  "5_pyusd0_weth_fee3000": {
    "label": "PYUSD0 / WETH  fee=3000  [FUSDEVStrategy: WETH collateral exit path]",
    "poolAddress": "811491e52f828d934966beaf21d94f14a49bf225",
    "exists": true, "initialized": true, "hasLiquidity": true,
    "liquidity": 12786161820710169,
    "PYUSD0_balance": 112758.47857400, "PYUSD0_balance_wei": 112758478574,
    "WETH_balance": 43.81450626,       "WETH_balance_wei": 43814506261860122328
  },
  "6_pyusd0_wbtc_fee3000": {
    "label": "PYUSD0 / WBTC  fee=3000  [FUSDEVStrategy: WBTC collateral exit path]",
    "poolAddress": "3b0727bbc497046a9dbd25417d2c78c09fe404fd",
    "exists": true, "initialized": true, "hasLiquidity": true,
    "liquidity": 3087626960,
    "PYUSD0_balance": 82693.82123900, "PYUSD0_balance_wei": 82693821239,
    "WBTC_balance": 2.07492126,       "WBTC_balance_wei": 207492126
  },
  "7_wflow_weth_fee3000": {
    "label": "WFLOW / WETH  fee=3000  [syWFLOWvStrategy: WETH & WBTC collateral first hop]",
    "poolAddress": "65f1535a8c82613260e53d84d5745b2a8b31f52a",
    "exists": true, "initialized": true, "hasLiquidity": true,
    "liquidity": 4514662552543590948860,
    "WFLOW_balance": 2375059.24580459, "WFLOW_balance_wei": 2375059245804599441133555,
    "WETH_balance": 23.59290529,       "WETH_balance_wei": 23592905291877765918
  },
  "8_weth_wbtc_fee3000": {
    "label": "WETH / WBTC  fee=3000  [syWFLOWvStrategy: WBTC collateral second hop]",
    "poolAddress": "c77d9a0dd85f2b140b3318f31f90c1e466ea1416",
    "exists": true, "initialized": true, "hasLiquidity": true,
    "liquidity": 4616697210435,
    "WETH_balance": 0.26799610, "WETH_balance_wei": 267996104144166848,
    "WBTC_balance": 0.00735991, "WBTC_balance_wei": 735991
  }
}

diag_evm_token_balances.cdc — check token balances at any EVM address

flow scripts execute cadence/scripts/diag_evm_token_balances.cdc   --args-json '[{"type":"String","value":"0xYOUR_EVM_ADDRESS"}]'   --network mainnet

Sample output — querying the MOET/PYUSD0 pool address (mainnet, 2026-03-11)

flow scripts execute cadence/scripts/diag_evm_token_balances.cdc   --args-json '[{"type":"String","value":"0x863b8bf842a7205e55896e518869e9f29a9a35af"}]'   --network mainnet

{
  "MOET":     { "decimals": 18, "balance": 19.89200582,    "balance_wei": 19892005825342628491 },
  "PYUSD0":   { "decimals": 6,  "balance": 30022.35759300, "balance_wei": 30022357593 },
  "FUSDEV":   { "decimals": 18, "balance": 0.00000000,     "balance_wei": 0 },
  "WFLOW":    { "decimals": 18, "balance": 0.00000000,     "balance_wei": 0 },
  "syWFLOWv": { "decimals": 20, "balance": 0.00000000,     "balance_wei": 0 },
  "WETH":     { "decimals": 18, "balance": 0.00000000,     "balance_wei": 0 },
  "WBTC":     { "decimals": 8,  "balance": 0.00000000,     "balance_wei": 0 }
}

diag_vault_prices.cdc — check ERC4626 vault share prices in USD

Reports the redemption price of syWFLOWv and FUSDEV vaults using totalAssets / totalSupply for the share price, multiplied by the Band Protocol oracle USD price.

Note: BandOracle.getReferenceData requires a FLOW fee. This script works only when BandOracle.getFee() == 0.0. If the fee is non-zero the script will panic.

flow scripts execute cadence/scripts/diag_vault_prices.cdc --network mainnet

Sample output (mainnet, 2026-03-11)

{
  "syWFLOWv": {
    "price_usd":           0.06578694,
    "price_in_underlying": 1.16033804,
    "underlying_usd":      0.05669120,
    "interpretation":      "1 syWFLOWv = $0.06578694",
    "totalAssets":         706940.48583706,
    "totalAssets_wei":     70694048583706368000000000,
    "totalShares":         609197.13043739,
    "totalShares_wei":     60919713043739290000000000,
    "underlying_address":  "d3bf53dac106a0290b0483ecbc89d40fcc961f3e",
    "asset_decimals":      18,
    "share_decimals":      20
  },
  "FUSDEV": {
    "price_usd":           1.01120000,
    "price_in_underlying": 1.01140000,
    "underlying_usd":      0.99980000,
    "interpretation":      "1 FUSDEV = $1.01120000",
    "totalAssets":         144238.86303100,
    "totalAssets_wei":     144238863031000000000000,
    "totalShares":         142609.16543200,
    "totalShares_wei":     142609165432000000000000,
    "underlying_address":  "99af3eea856556646c98c8b9b2548fe815240750",
    "asset_decimals":      6,
    "share_decimals":      18
  }
}

Test plan

• diag_verify_pools.cdc ran against mainnet — all 8 pools return exists=true, initialized=true, hasLiquidity=true
• diag_evm_token_balances.cdc ran against mainnet — MOET/PYUSD0 pool address shows correct reserves
• diag_vault_prices.cdc ran against mainnet — syWFLOWv ~$0.066, FUSDEV ~$1.011

🤖 Generated with Claude Code