[RFC] WARCoin: Deterministic 1:1 USD Stablecoin via Serialized 7-Day Color Ring Buffers and Burn-on-Egress Invariants

Economics
1

Author: Daemon Minwar
Category: Economics / Mechanism Design

TL;DR

We propose WARCoin, a deterministic, exploit-resistant 1:1 USD stablecoin architecture designed to eliminate infinite-mint bugs, cross-collateral contagion, and replay vectors. Instead of monolithic balance mappings, WARCoin enforces a USD-only ingress firewall, burn-on-egress serial invalidation, and 7 daily color-coded ring buckets (1,000 serials/bucket, #1–#1,000) bounded by a strict 10^9 global supply invariant.

1. Threat Model & Motivation

Standard ERC-20 stablecoins rely on unbounded integer storage slots (mapping(address => uint256)). If a minting authority is compromised or a bridge/collateral contract is exploited, attackers can mint arbitrary unbacked supply or contaminate reserves with toxic collateral. WARCoin mitigates these vectors at the state-transition level by enforcing finite, serialized issuance slots and strict asset isolation.

2. Core Protocol Architecture

A. Ingress / Egress Asset Firewall

  • Strict USD-Only Ingress: The minting router reverts on any non-USD asset deposit (require(asset == USD)). External crypto-assets are rejected at the gateway to prevent collateral contagion.
  • Burn-on-Egress Invalidation: Outbound transfers or swaps into external tokens immediately burn the underlying WARCoin serials on-chain, returning those serial indices to the active day’s Burn Pool and preventing replay/double-spend exploits.

B. 7-Day Color Ring & Serialized Buckets (#1 – #1,000)

Each 1 WARCoin ($1 USD) is tracked as a discrete serialized unit stamped with a Serial ID (#1–#1,000) and a Day-of-Week Color Index (0–6):

Index Day Color Tag Bucket Capacity
0 Sunday Red #0001 – #1000
1 Monday Yellow #0001 – #1000
2 Tuesday Pink #0001 – #1000
3 Wednesday Green #0001 – #1000
4 Thursday Orange #0001 – #1000
5 Friday Blue #0001 – #1000
6 Saturday Violet #0001 – #1000

C. Deterministic State-Transition Rules

  1. Sequential Genesis Run: Valid USD deposits mint serials sequentially (#1 -> #1,000) within the active day’s color bucket.
  2. Intra-Day Burn-to-Mint Loop: Mid-day withdrawals/egress transfers burn serials into the day’s Burn Pool, but burned indices are not immediately recycled. The state machine must first exhaust the sequential run up to #1,000 before looping back to exclusively re-mint indices from the Burn Pool.
  3. +1 Cyclic Color Spillover: If and only if all 1,000 serials in the current bucket are actively held (BurnPool.length == 0), the router executes a modulo shift (nextColor = (currentColor + 1) % 7) to open an isolated 1,000-serial spillover bucket, bounded by the 7-day ring.
  4. Fail-Safe Hard Freeze: If all 7 color buckets saturate with zero burned serials—or upon reaching the global hard cap of 1,000,000,000 active serials—minting reverts unconditionally (MintingPaused) until redemptions replenish the Burn Pool.

3. Supply Invariants

\sum \text{ActiveSerials} + \sum \text{BurnedSerials} \le 10^9
\text{ActiveSerials} \le \text{VerifiedUSDReserves}

4. Implementation & Security Questions

  1. Bitmap Packing: Since each daily bucket is fixed at 1,000 slots, packing active/burned flags into four uint256 words (uint256[4]) per color bucket enables O(1) bitwise state checks. Are there edge cases with MEV front-running when scanning lowest-set-bit indices during the Burn-to-Mint loop?
  2. Multi-Week Epoch Indexing: What is the most gas-efficient storage layout to index historical weekly rings up to the 10^9 global cap without state bloat?
  3. Atomic Egress Swaps: Any caveats with enforcing atomic serial burns inside DEX router callbacks when users swap WARCoin into external ERC-20s?