public_evidence/reproduction_report.md

Public-source UMA clean-room reproduction

Scope and inputs

This fixed episode is rebuilt without reading any curated Oracle-Nature ledger. The only semantic inputs are five public transaction receipts and canonical block headers (four on Polygon, one on Ethereum), deployed runtime bytecode, checksum-pinned UMA contract source, and the public case specification. Polygon provider: polygon.drpc.org; Ethereum provider: ethereum-rpc.publicnode.com. Source verification: uma_oov2=cached_verified, uma_oov2_interface=cached_verified, uma_voting_v2_deployed_source=cached_verified.

Reconstructed economic result

The requester configured 5 USDC.e, while proposer and disputer each escrowed 750 USDC.e (500 bond + 250 final fee). The DVM protocol resolution overturned the proposal. The disputer received 1,000 USDC.e: 750 returned principal plus 250 realized token gain. The configured 5 USDC.e was refunded and rolled into the reset request, so it is not counted as paid reward. The protocol fee is 500 USDC.e. Dispute Gas is retained separately as 122371903978702660 raw MATIC and is never added to USDC.e.

Validation and boundary

All 30 canonical receipt/header checks and all 13 lifecycle, cross-chain and flow checks pass. The Polygon bridge request hash, message hash and Ethereum DVM request ID are identical, producing cross_chain_link_grade=A. Seven source-code semantic rules pass, including the separation of VoterSlashed accrual from VoterSlashApplied stake mutation. This is protocol resolution, not independent factual truth; the minimal five-transaction case does not reconstruct the complete voter population, off-chain investigation cost or timestamped USD welfare.

Reproduction

python scripts/case_studies/reproduce_uma_public_rpc_case.py

For deterministic offline replay after the public evidence has been frozen:

python scripts/case_studies/reproduce_uma_public_rpc_case.py \
  --snapshot-dir data/case_studies/uma_public_rpc_reproduction/raw \
  --source-cache data/case_studies/uma_public_rpc_reproduction/source \
  --offline-sources