Meet the Tech: TransactionWatcher 🧩 The polling primitive that waits for a transaction to reach a state — completed, pending, or anything you can express as a predicate. Three methods: awaitCompleted, awaitPending, awaitConditionally. Wired into the entrypoint as awaitCompletedTransaction, exposed directly when you need custom polling cadence or conditions. 💡 🧵

Tips & Tricks 💡 ✦ Default polling is 6000ms, default timeout is 90000ms, default patience is 0ms. Patience is an extra wait after the predicate fires — useful because outcome (events, logs, contract results) can lag the status flip slightly. ✦ Pass shorter intervals for faster confirmation in tests against a chain simulator. Pass longer intervals to avoid hammering production RPCs. ✦ The entrypoint's awaitCompletedTransaction uses the defaults. If you need custom cadence or predicates, instantiate TransactionWatcher directly. ✦ Failures throw typed errors — ErrExpectedTransactionStatusNotReached, ErrIsCompletedFieldIsMissingOnTransaction, ErrExpectedTransactionEventsNotFound. Catch and handle the case you care about, don't swallow them all.

️️📣 MAINNET Upgrade v1.11.7.0 We are upgrading the MAINNET! Version v1.11.7.0 is out. ℹ️ This version fixes an edge case at bootstrap when starting in epoch. 📅 No activation epoch. Upgrade instructions 👇

🧩 Compatible services: - proxy: v1.3.4 - notifier: v1.3.2 - indexer: v1.9.3 ❗ Actions needed: Please upgrade your nodes at your earliest convenience. ℹ️ This release is optional for both validators and observers.

Meet the Tech: FungibleTokenMapper 🧩 A storage mapper that owns the full lifecycle of a fungible ESDT — issuance, minting, burning, transfers, roles, balance queries. One mapper per token. State machine: NotSet → Pending (issuance in flight) → Token(identifier). Replaces hundreds of lines of token-management boilerplate with typed calls into a single object. 💡 🧵

Tips & Tricks 💡 ✦ Token issuance is async — control returns after the call to the ESDT system contract, and the identifier is set in the callback. Use the default issue callback (DEFAULT_ISSUE_CALLBACK_NAME) unless you have a reason to customize it. ✦ State machine: NotSet → Pending → Token(id). Read it with get_token_state() if you need to handle pre-issuance flows. ✦ require_same_token(&payment.token_identifier) is the idiomatic way to validate an incoming payment matches the managed token. Pair with #[payable] for the full pattern. ✦ For NFTs and SFTs, use NonFungibleTokenMapper instead — it handles nonces, attributes, royalties, and the create/burn semantics specific to non-fungibles.