Fee Address Routing and Protocol Revenue Integrity

WAproxy deducts protocol fee from amount_sat
and routes it to a predefined fee address per coin.

Fee routing must be deterministic and explicit.

------------------------------------------------------------
FEE CALCULATION
------------------------------------------------------------

protocol_fee = amount_sat × FEE_BPS / 10000

receiver_gets = amount_sat - protocol_fee

------------------------------------------------------------
FEE DESTINATION MODEL
------------------------------------------------------------

Each supported coin defines:

COIN_FEE_ADDR_MAIN
COIN_FEE_ADDR_TEST

Fee routing must:

• match selected network (main/test)

• use configured fee address

• be applied deterministically

------------------------------------------------------------
TRANSACTION STRUCTURE
------------------------------------------------------------

Outgoing transaction may contain:

• Output 1: recipient address (receiver_gets)

• Output 2: protocol fee address (protocol_fee)

Network fee remains separate and paid by wallet.

------------------------------------------------------------
INTEGRITY REQUIREMENTS
------------------------------------------------------------

Fee routing must:

• not modify amount_sat definition

• not depend on market conditions

• not be dynamically altered per request

• not be skipped under retry

------------------------------------------------------------
ATTACK PREVENTION
------------------------------------------------------------

Fee address must not:

• be client-supplied

• be mutable via API

• be influenced by idempotency replay

It is server-configured and static.

------------------------------------------------------------
ACCOUNTING DISCIPLINE
------------------------------------------------------------

For each wallet_send:

• Store protocol_fee

• Store fee_address

• Store recipient_amount

• Store txid

This enables:

• deterministic auditing

• revenue reconciliation

• financial transparency

------------------------------------------------------------
ARCHITECTURAL STATEMENT
------------------------------------------------------------

Protocol revenue must be deterministic,
transparent, and non-negotiable.

WAproxy enforces fee routing
as part of execution integrity.