Token-2022 Transfer-Fee Payment Reconciler

Recomputes the transfer fee a Token-2022 mint with the transfer-fee extension withholds and the net amount the recipient receives, given the fee schedule, the TransferChecked amount, the execution epoch and the amount a payment verifier credited, then reconciles the credited amount against that net: MATCH, OVER_CREDITED (the Kora GHSA-725g defect class, a verifier crediting the pre-fee amount) or UNDER_CREDITED, with credited_minus_net reported. All amounts are decimal strings computed in BigInt (128-bit intermediates, no floats). The output also records a declared-fee FeeMismatch for TransferCheckedWithFee, an epoch-schedule divergence when the verifier used a different schedule than the execution epoch, and an informational consumer view showing where the x402 SVM gross-amount path and the balance-delta net path disagree.

Tool URL: https://ainumbers.co/chaingraph/art-715-token2022-transfer-fee-reconciler.html AP2/Policy Mandate export: yes