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sip title description author status Last Call type category created
37
General smart contract upgrade
Extend the smart contract max pages, adjust fees, extend and add new operations
jjos, frank_the_tank
Review
2022-04-24
Standard
Core
2022-04-17

Abstract

General smart contract upgrade allowing to create more complex applications.

Specification

This proposal includes the following basic changes:

  • New contracts published as Version 3 or simply v3
  • Maximum number of pages is enlarged to 40 (as opposed to 20)
  • Basic step fee is adjusted to 0.001 SIGNA to be compatible with SIP34
  • Fee per page is adjusted to 0.1 SIGNA to be compatible with SIP34

The following operations are extended:

  • GET_TYPE_FOR_TX_IN_A = 0x0305: for v3 contracts will return the actual transaction type, otherwise 1 for a message and 0 for payment
  • MESSAGE_FROM_TX_IN_A_TO_B = 0x0309: accept messages longer than 64 bits, A2 contains the page to read
  • GET_CURRENT_BALANCE = 0x0400: returns the current balance of the contract for the asset id in B2 (or SIGNA if B2==0)
  • SEND_A_TO_ADDRESS_IN_B = 0x0405: if multiple messages are sent in the same block, they are concatenated one after the other
  • B_TO_ADDRESS_OF_CREATOR = 0x030b: returns the creator of the AT ID given in B2 (creator of this contract if B2==0)

The following new operations are included:

  • E_OP_CODE_POW_DAT = 0x19: calculates x^(y/1_0000_0000) using double precision logic
  • E_OP_CODE_MDV_DAT = 0x2c: calculates (x*y)/den using big integer logic to avoid overflow
  • CHECK_SIG_B_WITH_A = 0x0206: checks if the signature of [AT ID, B2..4] can be verified with the message attached on tx id in A1 (page in A2) for account id in A3
  • GET_CODE_HASH_ID = 0x030c: get the AT's code hash ID (or of the AT id on B2 if B2!=0)
  • GET_ACTIVATION_FEE = 0x040d: get the AT's minimum activation fee (or of the AT id on B2 if B2!=0)
  • PUT_LAST_BLOCK_GSIG_IN_A = 0x040e: put the last block generation signature in A

The following operations are fixed:

  • E_OP_CODE_SLP_IMD = 0x20: Fixes #495
  • E_OP_CODE_SET_IDX = 0x0f: Fixes #548
  • E_OP_CODE_IDX_DAT = 0x15: Fixes #548
  • CHECK_A_IS_ZERO = 0x0125: Fixes inverted logic
  • CHECK_B_IS_ZERO = 0x0126: Fixes inverted logic

Backwards Compatibility

This is a hard forking change, thus breaking compatibility with old fully-validating nodes.
It should not be deployed without widespread consensus. Contracts of previous versions run unchanged.

Copyright

Copyright and related rights waived via CC0.