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Proxy.cairo
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/
Proxy.cairo
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// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts for Cairo v0.6.0 (upgrades/presets/Proxy.cairo)
%lang starknet
from starkware.cairo.common.cairo_builtins import HashBuiltin
from starkware.starknet.common.syscalls import library_call, library_call_l1_handler
from openzeppelin.upgrades.library import Proxy
// @dev Cairo doesn't support native decoding like Solidity yet,
// that's why we pass three arguments for calldata instead of one
// @param implementation_hash the implementation contract hash
// @param selector the implementation initializer function selector
// @param calldata_len the calldata length for the initializer
// @param calldata an array of felt containing the raw calldata
@constructor
func constructor{syscall_ptr: felt*, pedersen_ptr: HashBuiltin*, range_check_ptr}(
implementation_hash: felt, selector: felt,
calldata_len: felt, calldata: felt*
) {
alloc_locals;
Proxy._set_implementation_hash(implementation_hash);
if (selector != 0) {
// Initialize proxy from implementation
library_call(
class_hash=implementation_hash,
function_selector=selector,
calldata_size=calldata_len,
calldata=calldata,
);
}
return ();
}
//
// Fallback functions
//
@external
@raw_input
@raw_output
func __default__{syscall_ptr: felt*, pedersen_ptr: HashBuiltin*, range_check_ptr}(
selector: felt, calldata_size: felt, calldata: felt*
) -> (retdata_size: felt, retdata: felt*) {
let (class_hash) = Proxy.get_implementation_hash();
let (retdata_size: felt, retdata: felt*) = library_call(
class_hash=class_hash,
function_selector=selector,
calldata_size=calldata_size,
calldata=calldata,
);
return (retdata_size, retdata);
}
@l1_handler
@raw_input
func __l1_default__{syscall_ptr: felt*, pedersen_ptr: HashBuiltin*, range_check_ptr}(
selector: felt, calldata_size: felt, calldata: felt*
) {
let (class_hash) = Proxy.get_implementation_hash();
library_call_l1_handler(
class_hash=class_hash,
function_selector=selector,
calldata_size=calldata_size,
calldata=calldata,
);
return ();
}