feat/replace nilchain payments with erc 20 payments #63
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BREAKING CHANGE: Payments now use Ethereum ERC-20 token burns instead of nilchain transactions. Configuration schema has changed. Note the test suite is broken in this commit but will be fixed shorlty. New Ethereum RPC integration: - Add AlloyBurnWithDigestEventRetriever for querying burn events - Verify chain Iid at startup to prevent testnet/mainnet misconfigurations - Use RFC 8785 (JCS) canonical JSON for consistent payload hashing - Add chain_id to payment payload for cross-chain verification Configuration changes: - Replace nilchain_url with ethereum_rpc_url - Add nil_token_address, burn_contract_address, chain_id Startup improvements: - Add structured logging of configuration at startup - Log chain ID verification success Removed: - nilauth_client dependency (nilchain client) - Legacy migrations (replaced with consolidated init schema) - Docker nilchain service from compose
- Add PaymentRecord struct to capture all required payment fields (chain_id, amount_wei, digest, payer_address, etc.) - Update credit_payment and store_invalid_payment to insert all NOT NULL columns required by the new ERC-20 payment schema - Add serial_test crate and mark integration tests that use Ethereum transactions with #[serial] to prevent nonce conflicts when tests run in parallel - Fix expected error code in pay_too_soon test (CANNOT_RENEW_YET) - Fix deprecation warning by using as_ref() instead of as_slice()
- Replace runtime query()/query_as() with query!() macros for compile-time SQL validation and type checking - Convert lookup_revocations from dynamic placeholders to ANY($1) array syntax compatible with query! macro - Generate .sqlx/ offline query data for CI builds without a database - Remove unused imports (itertools, FromRow, Executor, etc.)
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