Flow(FLOW) Crescendo Network Upgrade

The Flow Crescendo network upgrade will happen on September 4th, 5am PT!

With the biggest upgrade to Mainnet since genesis, Flow will be connected to the entire web3 ecosystem through complete EVM Equivalence.

Cadence 1.0 Readiness Plan‍

Cadence 1.0 will be the last Cadence release to include breaking changes to smart contracts on Flow; all contract owners must update their contracts in order for them to remain fully operational. To help Flow's community of builders ensure their applications will be fully functional and ready for the upcoming migration, we have developed a process to flag transactions on the network that depend on code that might break after the Cadence 1.0 update.

This flagging process checks transactions on the pre-1.0 networks (both Mainnet and Testnet), and inspects all smart contracts that a transaction depends on (directly and indirectly). If any smart contract inspected does not have a valid Cadence 1.0 update staged and ready for migration, the network will flag the transaction as problematic. The Execution Node operated by the Flow Foundation will log these issues, and we will provide a summary of this data to affected developers. Additionally, in order to ensure that no one is surprised by this transition, the network will probabilistically fail a small percentage of these transactions with a special error message to ensure the problem can't be ignored.

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