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Welcome to the 🐍 snekmate 0.1.2 release, now aligned with the latest Vyper version 0.4.3:

pip install vyper snekmate

Vyper has recently introduced the new raw_create built-in function via PR #4204. Building on this, this release adds utility functions for contract deployments using CREATE, CREATE2, and CREATE3 (i.e. without relying on an initcode factor).

# pragma version ~=0.4.3
# pragma nonreentrancy off

from snekmate.utils import create as c1
from snekmate.utils import create2 as c2
from snekmate.utils import create3 as c3

@external
@payable
def deploy_create(init_code: Bytes[8_192]) -> address:
    return c1._deploy_create(init_code)

@external
@payable
def deploy_create2(salt: bytes32, init_code: Bytes[8_192]) -> address:
    return c2._deploy_create2(salt, init_code)

@external
@payable
def deploy_create3(salt: bytes32, init_code: Bytes[8_192]) -> address:
    return c3._deploy_create3(salt, init_code)

Additionally, leveraging EIP-2935, this release introduces a block_hash function that extends access to historical block hashes beyond the native 256-block limit. It uses the EIP-2935 history contract, which maintains a ring buffer of the last 8,191 block hashes stored in state:

• For blocks within the last 256 blocks, the function block_hash uses the native BLOCKHASH opcode.
• For blocks between 257 and 8,191 blocks ago, the function block_hash queries the EIP-2935 history contract using the specified get method: https://eips.ethereum.org/EIPS/eip-2935#get.
• For blocks older than 8,191 blocks or future blocks (including the current one), it returns zero, matching the BLOCKHASH behaviour.

# pragma version ~=0.4.3
# pragma nonreentrancy off

from snekmate.utils import block_hash as bh

@external
@view
def block_hash(block_number: uint256) -> bytes32:
    return bh._block_hash(block_number)

👇 Below are the detailed code changes, 🐍 snekmate's new contributors, and the full CHANGELOG. Persist. Excel. Believe.

💥 New Features

• Utility Functions
  • block_hash: Add EIP-2935-based utility functions. (#316)
  • create: Add CREATE-based deployment function. (#323)
  • create2: Add CREATE2-based deployment function. (#323)
  • create3: Add CREATE3-based address computation and deployment functions. (#323)

♻️ Refactoring

• Explicitly set nonreentrancy off pragma. (#320)

🐛 Bug Fixes

• Extensions
  • erc4626: Fix _max_withdraw check in withdraw function to use owner. (#327)

📄 Licensing

• Add the MIT License as a dual-licensing option. (#315)

🔖 Release Management

• Add provenance to npm release. (#314)

❗️ Breaking Changes

• The contracts create_address.vy and create2_address.vy have been renamed to create.vy and create2.vy, respectively. In create.vy, the functions _compute_address_rlp_self, _compute_address_rlp, and _convert_keccak256_2_address have been renamed to _compute_create_address_self, _compute_create_address, and _convert_keccak256_to_address. Similarly, in create2.vy, the functions _compute_address_self and _compute_address have been renamed to _compute_create2_address_self and _compute_create2_address. (#323)
• All 🐍 snekmate contracts now target the new 🐍Vyper default EVM version prague (#331). If you intend to deploy on an EVM chain with no prague support, you must compile — using the cancun EVM version as an example — the main contract that uses the 🐍 snekmate module contracts with the --evm-version cancun option; e.g. vyper --evm-version cancun src/snekmate/tokens/mocks/erc20_mock.vy, or add the # pragma evm-version cancun directive to the main contract that uses the 🐍 snekmate module contracts:

# pragma version ~=0.4.3
# pragma evm-version cancun

...

🙏🏽 New Contributors

• @0xkarmacoma made his first contribution via #326.
• @benber86 made his first contribution via #327.

👀 Full Changelog

• v0.1.1...v0.1.2