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| 1 | +use starknet::account::Call; |
| 2 | + |
| 3 | +mod SUPPORTED_TX_VERSION { |
| 4 | + const DEPLOY_ACCOUNT: felt252 = 1; |
| 5 | + const DECLARE: felt252 = 2; |
| 6 | + const INVOKE: felt252 = 1; |
| 7 | +} |
| 8 | + |
| 9 | +#[starknet::interface] |
| 10 | +trait IAccount<T> { |
| 11 | + fn is_valid_signature(self: @T, hash: felt252, signature: Array<felt252>) -> felt252; |
| 12 | + fn supports_interface(self: @T, interface_id: felt252) -> bool; |
| 13 | + fn public_key(self: @T) -> felt252; |
| 14 | +} |
| 15 | + |
| 16 | +#[starknet::contract] |
| 17 | +mod Account { |
| 18 | + use super::{Call, IAccount, SUPPORTED_TX_VERSION}; |
| 19 | + use starknet::{get_caller_address, call_contract_syscall, get_tx_info, VALIDATED}; |
| 20 | + use zeroable::Zeroable; |
| 21 | + use array::{ArrayTrait, SpanTrait}; |
| 22 | + use ecdsa::check_ecdsa_signature; |
| 23 | + use box::BoxTrait; |
| 24 | + use result::ResultTrait; |
| 25 | + |
| 26 | + const SIMULATE_TX_VERSION_OFFSET: felt252 = 340282366920938463463374607431768211456; // 2**128 |
| 27 | + const SRC6_TRAIT_ID: felt252 = 1270010605630597976495846281167968799381097569185364931397797212080166453709; // hash of SNIP-6 trait |
| 28 | + |
| 29 | + #[storage] |
| 30 | + struct Storage { |
| 31 | + public_key: felt252 |
| 32 | + } |
| 33 | + |
| 34 | + #[constructor] |
| 35 | + fn constructor(ref self: ContractState, public_key: felt252) { |
| 36 | + self.public_key.write(public_key); |
| 37 | + } |
| 38 | + |
| 39 | + #[external(v0)] |
| 40 | + impl AccountImpl of IAccount<ContractState> { |
| 41 | + fn is_valid_signature(self: @ContractState, hash: felt252, signature: Array<felt252>) -> felt252 { |
| 42 | + let is_valid = self.is_valid_signature_bool(hash, signature.span()); |
| 43 | + if is_valid { VALIDATED } else { 0 } |
| 44 | + } |
| 45 | + |
| 46 | + fn supports_interface(self: @ContractState, interface_id: felt252) -> bool { |
| 47 | + interface_id == SRC6_TRAIT_ID |
| 48 | + } |
| 49 | + |
| 50 | + fn public_key(self: @ContractState) -> felt252 { |
| 51 | + self.public_key.read() |
| 52 | + } |
| 53 | + } |
| 54 | + |
| 55 | + #[external(v0)] |
| 56 | + #[generate_trait] |
| 57 | + impl ProtocolImpl of ProtocolTrait { |
| 58 | + fn __execute__(ref self: ContractState, calls: Array<Call>) -> Array<Span<felt252>> { |
| 59 | + let arr = ArrayTrait::new(); |
| 60 | + panic_with_felt252('panic'); |
| 61 | + arr |
| 62 | + //self.only_protocol(); |
| 63 | + // self.only_supported_tx_version(SUPPORTED_TX_VERSION::INVOKE); |
| 64 | + // self.execute_multiple_calls(calls) |
| 65 | + } |
| 66 | + |
| 67 | + fn __validate__(self: @ContractState, calls: Array<Call>) -> felt252 { |
| 68 | + panic_with_felt252('panic'); |
| 69 | + 0 |
| 70 | +// self.only_protocol(); |
| 71 | +// self.only_supported_tx_version(SUPPORTED_TX_VERSION::INVOKE); |
| 72 | +// self.validate_transaction() |
| 73 | + } |
| 74 | + |
| 75 | + fn __validate_declare__(self: @ContractState, class_hash: felt252) -> felt252 { |
| 76 | + self.only_protocol(); |
| 77 | + self.only_supported_tx_version(SUPPORTED_TX_VERSION::DECLARE); |
| 78 | + self.validate_transaction() |
| 79 | + } |
| 80 | + |
| 81 | + fn __validate_deploy__(self: @ContractState, class_hash: felt252, salt: felt252, public_key: felt252) -> felt252 { |
| 82 | + self.only_protocol(); |
| 83 | + self.only_supported_tx_version(SUPPORTED_TX_VERSION::DEPLOY_ACCOUNT); |
| 84 | + self.validate_transaction() |
| 85 | + } |
| 86 | + } |
| 87 | + |
| 88 | + #[generate_trait] |
| 89 | + impl PrivateImpl of PrivateTrait { |
| 90 | + fn only_protocol(self: @ContractState) { |
| 91 | + let sender = get_caller_address(); |
| 92 | + assert(sender.is_zero(), 'Account: invalid caller'); |
| 93 | + } |
| 94 | + |
| 95 | + fn is_valid_signature_bool(self: @ContractState, hash: felt252, signature: Span<felt252>) -> bool { |
| 96 | + let is_valid_length = signature.len() == 2_u32; |
| 97 | + |
| 98 | + if !is_valid_length { |
| 99 | + return false; |
| 100 | + } |
| 101 | + |
| 102 | + check_ecdsa_signature( |
| 103 | + hash, self.public_key.read(), *signature.at(0_u32), *signature.at(1_u32) |
| 104 | + ) |
| 105 | + } |
| 106 | + |
| 107 | + fn validate_transaction(self: @ContractState) -> felt252 { |
| 108 | + let tx_info = get_tx_info().unbox(); |
| 109 | + let tx_hash = tx_info.transaction_hash; |
| 110 | + let signature = tx_info.signature; |
| 111 | + |
| 112 | + let is_valid = self.is_valid_signature_bool(tx_hash, signature); |
| 113 | + assert(is_valid, 'Account: Incorrect tx signature'); |
| 114 | + VALIDATED |
| 115 | + } |
| 116 | + |
| 117 | + fn execute_single_call(self: @ContractState, call: Call) -> Span<felt252> { |
| 118 | + let Call{to, selector, calldata} = call; |
| 119 | + call_contract_syscall(to, selector, calldata.span()).unwrap() |
| 120 | + } |
| 121 | + |
| 122 | + fn execute_multiple_calls(self: @ContractState, mut calls: Array<Call>) -> Array<Span<felt252>> { |
| 123 | + let mut res = ArrayTrait::new(); |
| 124 | + loop { |
| 125 | + match calls.pop_front() { |
| 126 | + Option::Some(call) => { |
| 127 | + let _res = self.execute_single_call(call); |
| 128 | + res.append(_res); |
| 129 | + }, |
| 130 | + Option::None(_) => { |
| 131 | + break (); |
| 132 | + }, |
| 133 | + }; |
| 134 | + }; |
| 135 | + res |
| 136 | + } |
| 137 | + |
| 138 | + fn only_supported_tx_version(self: @ContractState, supported_tx_version: felt252) { |
| 139 | + let tx_info = get_tx_info().unbox(); |
| 140 | + let version = tx_info.version; |
| 141 | + assert( |
| 142 | + version == supported_tx_version || |
| 143 | + version == SIMULATE_TX_VERSION_OFFSET + supported_tx_version, |
| 144 | + 'Account: Unsupported tx version' |
| 145 | + ); |
| 146 | + } |
| 147 | + } |
| 148 | +} |
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