Proportional Fee Distribution to Multiple Platforms

[Kingsman-99]

Description

The platform currently routes all collected fees to a single address. For partner integrations, fees should be distributable across multiple platform addresses in configurable proportions, paid out at invoice finalisation.

Technical Context

Replace FeeRecipient: Address with FeeRecipients: Vec<(Address, u32)> (address, basis-point share) in storage::instance inside contracts/split/src/lib.rs. Define a FeeSplit struct in types.rs. Validate that fee recipient basis points sum to 10 000. Loop through recipients during payout and transfer each their proportional fee share.

Acceptance Criteria

• Fee is split proportionally across all registered fee recipients at payout time
• set_fee_recipients validates that shares sum to exactly 10 000 basis points
• A single fee recipient with 10 000 basis points behaves identically to the old single-recipient model
• Empty fee recipient list defaults to no fee deduction
• FeeRecipientsUpdated(recipients) event is emitted from events.rs on change
• All CI checks (cargo build --target wasm32-unknown-unknown, cargo test, cargo clippy) pass and the branch has no merge conflicts

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[temisan0x]

@temisan0x has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

Good day team, please i’d like to take on this issue

ℹ️ Repo Maintainers: To accept this application, review their application or assign @temisan0x to this issue.

[shaarknado]

@shaarknado has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

I WOULD LOVE TO WORK ON THIS TASK

ℹ️ Repo Maintainers: To accept this application, review their application or assign @shaarknado to this issue.