fix: payment hardening -- pricing, panics, external signer#5

Merged

mickvandijke merged 2 commits intomainfrom

fix/payment-upload-hardening

Apr 3, 2026

Commits on Apr 3, 2026

feat: add merkle payment calldata generation for external signers
grumbach
committed
fix: use imported PaymentVaultHandler instead of inline path
grumbach
committed