Source References: Use Doppler deployments as the contract source of truth for deployed addresses and revisions.

Doppler Hooks

When to use

• You need a top-level hook integration path for a price discovery launch
• You are using DopplerHookInitializer to register or manage hook callbacks
• You are troubleshooting hook-enabled multicurve pools and lifecycle transitions

Prerequisites

• Asset/numeraire addresses and expected pool mode (locked vs migrable)
• Hook contract addresses and intended flags

Core workflow

1. Initialize pool with InitData including optional dopplerHook and callback calldata.
2. Confirm stored state via getState(asset):
   • pool key
   • far tick
   • status
   • selected hook
3. Validate callback execution path by flag:
   • ON_INITIALIZATION_FLAG
   • ON_SWAP_FLAG
   • ON_GRADUATION_FLAG
4. Verify graduation / migration behavior for the configured hook path.

Supported hook modules

• Rehypothecation hook (RehypeDopplerHookInitializer) for buybacks, fee routing, and protocol-owner fee claims
• ScheduledLaunchDopplerHook for start-time gates
• SwapRestrictorDopplerHook for per-address amount ceilings

Quick facts

Item	Detail
Initializer contract	DopplerHookInitializer
Base hook contract	BaseDopplerHook
Core callback flags	ON_INITIALIZATION_FLAG, ON_SWAP_FLAG, ON_GRADUATION_FLAG
Common module	Rehypothecation hook (RehypeDopplerHookInitializer)

Failure modes

• Hook module not enabled for the target deployment
• Incorrect callback calldata encoding
• Status mismatch (WrongPoolStatus cases)
• Attempting migration without graduation conditions met

References

• WORKFLOWS.md
• STATE-MAP.md
• Source: doppler/src/initializers/DopplerHookInitializer.sol, doppler/src/base/BaseDopplerHook.sol, doppler/docs/DopplerHookInitializer.md

Related skills

• rehypothecation-hook
• pda-multicurve
• verification