# Breaking Changes **URL:** https://forum.flow.com/c/announcements/breaking-changes/30.md [Latest](https://forum.flow.com/latest.md) · [Categories](https://forum.flow.com/categories.md) · [Tags](https://forum.flow.com/tags.md) --- ## [About the Breaking Changes category](https://forum.flow.com/t/about-the-breaking-changes-category/762)
**Author:** [@unlocked](https://forum.flow.com/u/unlocked)\ **Replies:** 0
This category will be used exclusively to update the community about breaking changes across Flow Network, SDKs and/or related tools. --- ## [Proposal for Breaking Changes to FlowToken Events. Looking for feedback](https://forum.flow.com/t/proposal-for-breaking-changes-to-flowtoken-events-looking-for-feedback/5617)
**Author:** [@flowjosh](https://forum.flow.com/u/flowjosh)\ **Replies:** 6\ **Last updated:** [February 21, 2024, 1:08pm UTC](https://forum.flow.com/t/proposal-for-breaking-changes-to-flowtoken-events-looking-for-feedback/5617 "2024-02-21T13:08:50Z")
As part of the Cadence 1.0 upgrade, many changes are coming to the Cadence fungible token standard. One of them is the addition of standard Withdrawn and Deposited events that get emitted for every fungible token impleme… --- ## [Upcoming changes to Access API rate limits on the community Access nodes](https://forum.flow.com/t/upcoming-changes-to-access-api-rate-limits-on-the-community-access-nodes/4940)
**Author:** [@vishal](https://forum.flow.com/u/vishal)\ **Replies:** 2\ **Last updated:** [June 29, 2023, 3:57pm UTC](https://forum.flow.com/t/upcoming-changes-to-access-api-rate-limits-on-the-community-access-nodes/4940 "2023-06-29T15:57:28Z")
Hello developers, The Flow community is growing! To better support all users, the Access API rate limit on the community access nodes will be revised in the coming weeks. This will help ensure fair usage of the communit… --- ## [Plan to roll out Access API rate limits changes on Flow Mainnet starting Wednesday, 8/16](https://forum.flow.com/t/plan-to-roll-out-access-api-rate-limits-changes-on-flow-mainnet-starting-wednesday-8-16/5107)
**Author:** [@vishal](https://forum.flow.com/u/vishal)\ **Replies:** 1\ **Last updated:** [August 16, 2023, 5:26pm UTC](https://forum.flow.com/t/plan-to-roll-out-access-api-rate-limits-changes-on-flow-mainnet-starting-wednesday-8-16/5107 "2023-08-16T17:26:31Z")
Hello, As announced earlier, Access API rate limits on the public access nodes will be revised. These changes have been rolled out to testnet. We would now like to gradually start rolling out these changes to mainnet an… --- ## [Plan to roll out Access API rate limits changes on Flow Tesnet starting Monday, 7/24](https://forum.flow.com/t/plan-to-roll-out-access-api-rate-limits-changes-on-flow-tesnet-starting-monday-7-24/5031)
**Author:** [@vishal](https://forum.flow.com/u/vishal)\ **Replies:** 3\ **Last updated:** [August 8, 2023, 4:03pm UTC](https://forum.flow.com/t/plan-to-roll-out-access-api-rate-limits-changes-on-flow-tesnet-starting-monday-7-24/5031 "2023-08-08T16:03:09Z")
Hello, As announced earlier, Access API rate limits on the public access nodes will be revised. We want to start rolling out these rate changes starting with Testnet first and wanted to share the plan with you. Starti… --- ## [Temporary Testnet Node Registration Breaking Change: 10/21-10/25](https://forum.flow.com/t/temporary-testnet-node-registration-breaking-change-10-21-10-25/3726)
**Author:** [@DrewGarrison](https://forum.flow.com/u/DrewGarrison)\ **Replies:** 1\ **Last updated:** [October 26, 2022, 5:10pm UTC](https://forum.flow.com/t/temporary-testnet-node-registration-breaking-change-10-21-10-25/3726 "2022-10-26T17:10:17Z")
This is a notice that Node Registration will be undergoing a temporary breaking change update on Testnet From: October 21 through October 25 What is the change Node registrations into the Flow protocol are managed by … --- ## [Breaking Change: BLS Signature Verification](https://forum.flow.com/t/breaking-change-bls-signature-verification/3493)
**Author:** [@DrewGarrison](https://forum.flow.com/u/DrewGarrison)\ **Replies:** 1\ **Last updated:** [August 23, 2022, 1:53pm UTC](https://forum.flow.com/t/breaking-change-bls-signature-verification/3493 "2022-08-23T13:53:21Z")
Hello everyone, We want to let you know that there will be a breaking change to BLS Signature Verification that will impact all development teams. This breaking change is related to the core Flow protocol, therefore wil… --- ## [NFTStorefront Contract Update | 3/1/22](https://forum.flow.com/t/nftstorefront-contract-update-3-1-22/2860)
**Author:** [@DrewGarrison](https://forum.flow.com/u/DrewGarrison)\ **Replies:** 0\ **Last updated:** [February 23, 2022, 8:40pm UTC](https://forum.flow.com/t/nftstorefront-contract-update-3-1-22/2860 "2022-02-23T20:40:22Z")
This is a notice to inform the community that the NFTStorefront contract will be updated the week of 2/28. The update will add the following fields to all events emitted by the contract, specifically, the ListingComplete… --- ## [Breaking Change: Bugfix for Cadence Resource Owner Field](https://forum.flow.com/t/breaking-change-bugfix-for-cadence-resource-owner-field/2576)
**Author:** [@DrewGarrison](https://forum.flow.com/u/DrewGarrison)\ **Replies:** 0\ **Last updated:** [November 30, 2021, 7:54pm UTC](https://forum.flow.com/t/breaking-change-bugfix-for-cadence-resource-owner-field/2576 "2021-11-30T19:54:04Z")
We want to remind you that a bugfix for Cadence’s resource owner field is going to be deployed to Mainnet in the upcoming 2021-12-08 spork. As announced in the latest Cadence release notes, the field’s value was not cor… --- ## [Transaction Fee Implementation - 10/16/2021](https://forum.flow.com/t/transaction-fee-implementation-10-16-2021/2404)
**Author:** [@DrewGarrison](https://forum.flow.com/u/DrewGarrison)\ **Replies:** 0\ **Last updated:** [September 21, 2021, 1:23am UTC](https://forum.flow.com/t/transaction-fee-implementation-10-16-2021/2404 "2021-09-21T01:23:10Z")
We want to inform everyone that we will be introducing the first phase of Transaction Fees on Flow on October 16, 2021 at 7:30am PT (2:30pm UTC). This will be a flat fee of 0.00001 FLOW applied to every transaction submi… --- ## [October Pre-Spork Community Update - 10/05/21](https://forum.flow.com/t/october-pre-spork-community-update-10-05-21/2442)
**Author:** [@laynelafrance](https://forum.flow.com/u/laynelafrance)\ **Replies:** 0\ **Last updated:** [October 5, 2021, 2:01pm UTC](https://forum.flow.com/t/october-pre-spork-community-update-10-05-21/2442 "2021-10-05T14:01:38Z")
Hello community, We wanted to provide an update to the community around several critical points ahead of the upcoming Mainnet 14 spork on October 6, 2021, and going forward. We’d also like to thank everyone that has bee… --- ## [Node Operator Breaking Change: DKG Enabled, Database Update - 10/06/21](https://forum.flow.com/t/node-operator-breaking-change-dkg-enabled-database-update-10-06-21/2424)
**Author:** [@DrewGarrison](https://forum.flow.com/u/DrewGarrison)\ **Replies:** 0\ **Last updated:** [September 29, 2021, 6:52pm UTC](https://forum.flow.com/t/node-operator-breaking-change-dkg-enabled-database-update-10-06-21/2424 "2021-09-29T18:52:40Z")
In Mainnet14, the DKG (distributed key generation) will be enabled, requiring storage of dynamically generated confidential data (random beacon keys). These are stored in a separate database which is new with the Mainnet… --- ## [Transaction Fee Update: Testnet and Canarynet - 9/24/21](https://forum.flow.com/t/transaction-fee-update-testnet-and-canarynet-9-24-21/2412)
**Author:** [@DrewGarrison](https://forum.flow.com/u/DrewGarrison)\ **Replies:** 0\ **Last updated:** [September 23, 2021, 4:29pm UTC](https://forum.flow.com/t/transaction-fee-update-testnet-and-canarynet-9-24-21/2412 "2021-09-23T16:29:17Z")
In preparation for the rollout of Transaction Fees on Oct. 7, 2021, transaction fees on testnet and canarynet are being adjusted to the same price that will be on mainnet to allow everyone a chance to prepare. This chan… --- ## [Epochs Rollout & Milestones](https://forum.flow.com/t/epochs-rollout-milestones/2273)
**Author:** [@DrewGarrison](https://forum.flow.com/u/DrewGarrison)\ **Replies:** 0\ **Last updated:** [August 6, 2021, 8:29pm UTC](https://forum.flow.com/t/epochs-rollout-milestones/2273 "2021-08-06T20:29:25Z")
We wanted to let the developer and node operator community know that we will be deploying Epochs support on Flow Mainnet over three milestone phases beginning with the August 18 spork (Mainnet 12). The release of Epochs… --- ## [Breaking Change: Account Key Transaction Signing - 6/23/2021](https://forum.flow.com/t/breaking-change-account-key-transaction-signing-6-23-2021/2126)
**Author:** [@DrewGarrison](https://forum.flow.com/u/DrewGarrison)\ **Replies:** 1\ **Last updated:** [July 22, 2021, 4:47pm UTC](https://forum.flow.com/t/breaking-change-account-key-transaction-signing-6-23-2021/2126 "2021-07-22T16:47:00Z")
We want to let you know that a breaking change to transaction signing that could impact your development team has been deployed. This is a critical update that was actioned with the 6/23/2021 MainNet Spork in order to ad… --- ## [Account Minimum Balance Increase - 7/21/21](https://forum.flow.com/t/account-minimum-balance-increase-7-21-21/2172)
**Author:** [@DrewGarrison](https://forum.flow.com/u/DrewGarrison)\ **Replies:** 0\ **Last updated:** [July 9, 2021, 6:26pm UTC](https://forum.flow.com/t/account-minimum-balance-increase-7-21-21/2172 "2021-07-09T18:26:47Z")
Hello community, This is a notice to let everyone know that we will be increasing the Account Minimum Balance for all accounts to ensure they can store more NFTs following MainNet Spork 11 (July 21). All accounts will b… --- ## [Breaking Change: Cadence Crypto Contract Domain Tag - 6/16/2021](https://forum.flow.com/t/breaking-change-cadence-crypto-contract-domain-tag-6-16-2021/2081)
**Author:** [@DrewGarrison](https://forum.flow.com/u/DrewGarrison)\ **Replies:** 0\ **Last updated:** [June 16, 2021, 3:28pm UTC](https://forum.flow.com/t/breaking-change-cadence-crypto-contract-domain-tag-6-16-2021/2081 "2021-06-16T15:28:24Z")
We want to let you know that there will be a breaking change to Cadence that will impact development teams using the Crypto contract. This is a critical update. This change will go into effect: TestNet: 6-22-2021 Main… --- ## [Breaking Change: CreateAccount Event Functionality - 6/9/2021](https://forum.flow.com/t/breaking-change-createaccount-event-functionality-6-9-2021/2046)
**Author:** [@DrewGarrison](https://forum.flow.com/u/DrewGarrison)\ **Replies:** 0\ **Last updated:** [June 9, 2021, 11:45pm UTC](https://forum.flow.com/t/breaking-change-createaccount-event-functionality-6-9-2021/2046 "2021-06-09T23:45:53Z")
We want to let you know that there will be a breaking change to the CreateAccount event functionality of the Flow protocol that could impact a small number of development teams. This change will likely have a minimal imp… --- ## [Breaking Change: Transaction Domain Tags](https://forum.flow.com/t/breaking-change-transaction-domain-tags/1911)
**Author:** [@DrewGarrison](https://forum.flow.com/u/DrewGarrison)\ **Replies:** 0\ **Last updated:** [May 12, 2021, 9:16pm UTC](https://forum.flow.com/t/breaking-change-transaction-domain-tags/1911 "2021-05-12T21:16:30Z")
We want to let you know that there will be a breaking change to all SDKS that will impact all development teams. This is a critical update that requires direct action from all Flow ecosystem partners This change impacts… --- ## [Cadence: ECDSA secp256k1 Signature Algorithm Change](https://forum.flow.com/t/cadence-ecdsa-secp256k1-signature-algorithm-change/1939)
**Author:** [@DrewGarrison](https://forum.flow.com/u/DrewGarrison)\ **Replies:** 0\ **Last updated:** [May 17, 2021, 7:30pm UTC](https://forum.flow.com/t/cadence-ecdsa-secp256k1-signature-algorithm-change/1939 "2021-05-17T19:30:18Z")
We want to let you know that there will be a breaking change to Cadence that will impact all development teams. This is a critical update. This change will go into effect: Wednesday, May 26th Why This Change Happened … --- ## [Proposer Key Sequence Number Breaking Change](https://forum.flow.com/t/proposer-key-sequence-number-breaking-change/1913)
**Author:** [@DrewGarrison](https://forum.flow.com/u/DrewGarrison)\ **Replies:** 0\ **Last updated:** [May 12, 2021, 9:19pm UTC](https://forum.flow.com/t/proposer-key-sequence-number-breaking-change/1913 "2021-05-12T21:19:46Z")
Starting next MainNet Spork (May 26th), when running a transaction, the proposer key sequence number would always be incremented unless any of the following conditions occur: invalid transaction (transaction rejected b… --- ## [FlowIDTableStaking Smart Contract Breaking Change](https://forum.flow.com/t/flowidtablestaking-smart-contract-breaking-change/1912)
**Author:** [@DrewGarrison](https://forum.flow.com/u/DrewGarrison)\ **Replies:** 0\ **Last updated:** [May 12, 2021, 9:18pm UTC](https://forum.flow.com/t/flowidtablestaking-smart-contract-breaking-change/1912 "2021-05-12T21:18:35Z")
We want to let you know that there will be a breaking change to the FlowIDTableStaking smart contract that will impact all development teams who query certain information from the staking contract. This is an important u… --- ## [March 31 - Account Minimum Balance in Effect for Flow](https://forum.flow.com/t/march-31-account-minimum-balance-in-effect-for-flow/1416)
**Author:** [@unlocked](https://forum.flow.com/u/unlocked)\ **Replies:** 3\ **Last updated:** [April 29, 2021, 7:21pm UTC](https://forum.flow.com/t/march-31-account-minimum-balance-in-effect-for-flow/1416 "2021-04-29T19:21:49Z")
On the Wednesday March 31 Flow MainNet Spork, storage minimum balance requirements and transaction fees will come into effect. The following outlines what you need to know for this release: What is the FLOW storage m… --- ## [Storage Limit and Account Minimum Balance](https://forum.flow.com/t/storage-limit-and-account-minimum-balance/799)
**Author:** [@TheOneSock](https://forum.flow.com/u/TheOneSock)\ **Replies:** 4\ **Last updated:** [March 29, 2021, 10:18pm UTC](https://forum.flow.com/t/storage-limit-and-account-minimum-balance/799 "2021-03-29T22:18:51Z")
Important Storage limit and account minimum balance were released on the emulator. This is a breaking change. This also emulates what will be on the testnet in the near future. That is why it is highly recommended that … --- ## [Cadence v0.11 breaking changes](https://forum.flow.com/t/cadence-v0-11-breaking-changes/878)
**Author:** [@vishal](https://forum.flow.com/u/vishal)\ **Replies:** 0\ **Last updated:** [February 3, 2021, 5:47pm UTC](https://forum.flow.com/t/cadence-v0-11-breaking-changes/878 "2021-02-03T17:47:10Z")
Cadence v0.11 contained breaking changes, so please read its release notes ((https://github.com/onflow/cadence/releases/tag/v0.11.0) and the migration guide (https://docs.onflow.org/cadence/migration-guide#v011) for hin…