Hedera services sit on top of the Core node software and provide the functionalities that are accessed by users. These currently include the File Service, Consensus Service, Token Service, and Smart Contract Service. HIPs in the "Service" category are used to add to or improve the service-layer of Hedera. These types of features are implemented on Hedera consensus nodes.

Last Call

NumberTitleAuthorNeeds Council Approval Last Call Date Time
435 Record Stream V6 Stoyan Panayotov Yes Tue, 31 May 2022 07:00:00 +0000
475 Exchange rate system contract Michael Tinker Yes Tue, 31 May 2022 07:00:00 +0000

Draft

NumberTitleAuthorNeeds Council Approval
475 Exchange rate system contract Michael Tinker Yes

Accepted

NumberTitleAuthorNeeds Council Approval
173 Opt-in merged scheduling Michael Tinker, Anirudh Ghanta Yes
260 Smart Contract Traceability Danno Ferrin Yes
351 Add RandomGenerateTransaction Jaewook Kim, Leemon Baird Yes
372 Entity Auto-Renewals and Expiry Window Leemon Baird, Nosh Mody, Quan Nguyen Yes
376 Support Approve/Allowance/transferFrom standard calls from ERC20 and ERC721 Stoyan Panayotov Yes
394 Add Expected Decimal Information to TokenMint, TokenBurn, and TokenWipeAccount Ryan Leckey Yes
423 Long Term Scheduled Transactions Patrick Staton Yes
449 Record stream specification for expiring smart contracts Michael Tinker, Steven Sheehy Yes

Final

NumberTitleAuthorNeeds Council Approval
16 Entity Auto-Renewal Leemon Baird, Nosh Mody, Quan Nguyen Yes
17 Non-Fungible Tokens Daniel Ivanov Yes
18 Custom Hedera Token Service Fees Cooper Kunz, Rahul Kothari Yes
185 Smart Contract Service Gas Based Throttling Danno Ferrin Yes
206 Hedera Token Service Precompiled Contract for Hedera SmartContract Service Danno Ferrin Yes
218 Smart Contract interactions with Hedera Token Accounts Danno Ferrin Yes
222 Support ECDSA(secp256k1) keys Michael Tinker Yes
23 Make the need for token association opt-in Gerbert Vandenberghe Yes
24 Pause feature on Hedera Token Service [email protected], [email protected], [email protected] Yes
26 Migrate Smart Contract Service EVM to Hyperledger Besu EVM Daniel Ivanov, Danno Ferrin Yes
31 Add Token Transfer Decimal Information Chris Campbell Yes
32 Auto Account Creation Leemon Baird Yes
329 Support CREATE2 opcode Michael Tinker Yes
33 Add Network ID Field to Info Responses Simi Hunjan, David Matusevich, Leemon Baird, Mark Williamson, Alex Popowycz Yes
336 Approval and Allowance API for Tokens Albert Tam Yes
358 Allow Token Create Through Hedera Token Service Precompiled Contract Stoyan Panayotov Yes
367 Unlimited Token Associations Per Account Anirudh Ghanta Yes

Replaced

NumberTitleAuthorNeeds Council Approval
14 Token Hold Functionality Fernando Paris, Fernando Paris Yes
20 Standardized URI scheme to reference Hedera data Khoa Luong, Sam Wood, Stephanie Yi, Declan Fox Yes