feat: implement atomic batch invoice minting for SMEs#342
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Adds mint_invoices_batch(sme, Vec<BatchInvoiceInput>) -> Vec<u64> to invoice_nft, allowing SMEs to tokenize a backlog of receivables in a single transaction with all-or-nothing semantics. Implementation details: - BatchInvoiceInput contracttype struct with the same fields as mint_invoice (debtor_hash, amount, currency, due_date, ipfs_cid, risk_score, notes) - Phase 1 validates ALL entries before any storage write — any invalid entry aborts the entire batch (atomic-abort) - Phase 2 mints each invoice, reusing the same per-invoice logic as mint_invoice (validation, Invoice struct construction, TTL bump, invoice_created event) - Single require_auth() covers the whole batch (gas-efficient) - NextId advanced atomically after all mints succeed Tests (contracts/tests/src/lib.rs): - test_batch_mint_success: 3 valid invoices → IDs [1,2,3], all Created - test_batch_mint_atomic_abort_on_invalid_input: zero-amount entry aborts; next_id stays at 1 - test_batch_mint_invalid_risk_score_aborts: risk_score 101 aborts Closes #
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Adds mint_invoices_batch(sme, Vec) -> Vec to invoice_nft, allowing SMEs to tokenize a backlog of receivables in a single transaction with all-or-nothing semantics.
Implementation details:
Tests (contracts/tests/src/lib.rs):
Closes #271