[Blog](https://blnkfinance.com/blog) [Product](https://blnkfinance.com/blog/product) 2 min read # Introducing Blnk Core v0.10.1 What is new in Blnk Core v0.10.1. Feature and reliability updates for teams running the open-source ledger in their own environment. * * *  At Blnk Finance, ensuring financial accuracy and reliability drive our product mission. This week, we released 6 new ledger, reconciliation, and security features in Blnk Core, our open-source financial core, to support developers building better financial products. ## Fine-grained API access controls We expanded our security features by introducing [granular access controls](https://docs.blnkfinance.com/advanced/secure-blnk). Now, you can create multiple API keys and define their permissions within your infrastructure. For example, set a key to only record transactions without the ability to read or retrieve them. ``` { "name": "Create transactions", "owner": "create_transactions_001", "scopes": [ "transactions:write" ], "expires_at": "2026-03-11T00:00:00Z" } ``` ## Improved transaction precision We initially introduced precision for developers to handle decimal amounts, but this was capped at a maximum of 15 digits. With this update, we’ve added a new transaction parameter, `precise_amount`, enabling developers to seamlessly manage amounts larger than 15 digits in their financial applications. ``` { "precise_amount": 189207535698279000, "precision": 1000000000000000000, "currency": "ETH", ... } ``` ## More flexibility with overdrafts You can now set an [overdraft limit](https://docs.blnkfinance.com/transactions/overdrafts) on transactions with overdraft enabled, ensuring they only process if the source balance stays above the specified limit. For example, with a 5,000 USD limit, a 10,000 USD overdraft transaction would be rejected for exceeding the limit. ``` { ... "allow_overdraft": true, "overdraft_limit": 500 } ``` ## Cross-check and correct discrepancies in your balances If you suspect inaccuracies in your balances due to data corruption or errors, our new [Balance Reconstruction](https://docs.blnkfinance.com/advanced/balance-reconstruction) feature can help. It recomputes your balances from scratch using only your transactions, automatically correcting any discrepancies. ``` { "meta_data": { "BLNK_RECONCILIATION_RESULT": { "difference": "103842", "executed_at": "2025-03-16 22:55:34.281624+00", "previous_balance": "600", "previous_credit": "1200", "previous_debit": "600", "recalculated_balance": "104442", "recalculated_credit": "119600", "recalculated_debit": "15158" } } } ``` ## Perform reconciliation as transactions happen You can now quickly match transactions and mark them as reconciled, with all reconciliation details stored in the transaction’s metadata for seamless tracking. [Instant Reconciliation](https://docs.blnkfinance.com/reconciliations/overview#option-2:-instant-reconciliation) simplifies your reconciliation process, ensuring you can easily verify and audit transactions within Blnk Core. ## Conclusion You can explore the complete list of v0.10.1 features and updates in our [detailed changelog.](https://docs.blnkfinance.com/changelog/blnk-core) We’d also love to hear your feedback. Share here. On this page 1. [Fine-grained API access controls](#fine-grained-api-access-controls) 2. [Improved transaction precision](#improved-transaction-precision) 3. [More flexibility with overdrafts](#more-flexibility-with-overdrafts) 4. [Cross-check and correct discrepancies in your balances](#cross-check-and-correct-discrepancies-in-your-balances) 5. [Perform reconciliation as transactions happen](#perform-reconciliation-as-transactions-happen) 6. [Conclusion](#conclusion) Author - Jerry Enebeli Founder & CEO Updated on August 17, 2026 ## Related articles - [  Product ### How customer support teams use Blnk Finance May 12, 2025 ](https://blnkfinance.com/blog/how-customer-support-teams-use-blnk-finance) - [  Product ### Performing your back-office operations with Blnk April 2, 2025 ](https://blnkfinance.com/blog/performing-your-back-office-operations-with-blnk) - [  Product ### Introducing balance snapshots & historical balances March 13, 2025 ](https://blnkfinance.com/blog/introducing-balance-snapshots-historical-balances)