mirror of https://github.com/status-im/EIPs.git
159 lines
85 KiB
Markdown
159 lines
85 KiB
Markdown
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---
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eip: 999
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title: Restore Contract Code at 0x863DF6BFa4469f3ead0bE8f9F2AAE51c91A907b4
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author: Afri Schoedon (@5chdn)
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discussions-to: https://ethereum-magicians.org/t/eip-999-restore-contract-code-at-0x863df6bfa4/130
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status: Draft
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type: Standards Track
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category: Core
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created: 2018-04-04
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---
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## Simple Summary
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This document proposes to restore the contract code of the `WalletLibrary`
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contract at `0x863DF6BFa4469f3ead0bE8f9F2AAE51c91A907b4` with a patched version.
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The contract was accidentally self-destructed and renders a significant amount
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of Ether inaccessible.
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## Abstract
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The `WalletLibrary` contract was used by the
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[Parity Wallet](https://www.parity.io/) to reduce gas costs for users deploying
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multi-signature wallets on the Ethereum blockchain. It contained basic
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functionality such as confirming or revoking multi-signature transactions for
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any wallet deployed that depends on this library. The
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[accidental self-destruction](https://github.com/paritytech/parity/issues/6995)
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of the library contract caused significant amounts of Ether and other assets
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owned by many different parties to be inaccessible. This proposal suggests
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restoring the `WalletLibrary` by a
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[patched](https://github.com/parity-contracts/0x863df6bfa4) version to allow the
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owners of the dependent multi-signature wallets regain access to their assets.
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## Motivation
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This proposal is necessary because the Ethereum protocol does not allow the
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restoration of self-destructed contracts and there is no other simple way to
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enable the affected users and companies regaining access to their tokens and
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Ether. In opposite to previously discussed proposals, this will not change any
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EVM semantics and tries to achieve the goal of unfreezing the funds by a single
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state transition as specified in the next section.
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## Specification
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The self-destructed contract code at
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[`0x863DF6BFa4469f3ead0bE8f9F2AAE51c91A907b4`](https://etherscan.io/address/0x863df6bfa4469f3ead0be8f9f2aae51c91a907b4#code)
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shall be replaced with a patched version of the
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[`walletLibrary.sol`](https://github.com/parity-contracts/0x863df6bfa4/blob/master/contracts/walletLibrary.sol)
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as reviewed, tested, and approved in
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[parity-contracts/0x863df6bfa4](https://github.com/parity-contracts/0x863df6bfa4):
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```
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{
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"object": "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"opcodes": "PUSH1 0x60 PUSH1 0x40 MSTORE CALLVALUE ISZERO PUSH3 0xD JUMPI INVALID JUMPDEST JUMPDEST PUSH1 0x0 DUP1 DUP1 SLOAD DUP1 PUSH1 0x1 ADD DUP3 DUP2 PUSH3 0x25 SWAP2 SWAP1 PUSH3 0x2D9 JUMP JUMPDEST SWAP2 PUSH1 0x0 MSTORE PUSH1 0x20 PUSH1 0x0 SHA3 SWAP1 ADD PUSH1 0x0 JUMPDEST PUSH1 0x0 SWAP1 SWAP2 SWAP1 SWAP2 PUSH2 0x100 EXP DUP2 SLOAD DUP2 PUSH20 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF MUL NOT AND SWAP1 DUP4 PUSH20 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF AND MUL OR SWAP1 SSTORE POP POP PUSH3 0x120 DUP2 DUP1 SLOAD DUP1 PUSH1 0x20 MUL PUSH1 0x20 ADD PUSH1 0x40 MLOAD SWAP1 DUP2 ADD PUSH1 0x40 MSTORE DUP1 SWAP3 SWAP2 SWAP1 DUP2 DUP2 MSTORE PUSH1 0x20 ADD DUP3 DUP1 SLOAD DUP1 ISZERO PUSH3 0xFD JUMPI PUSH1 0x20 MUL DUP3 ADD SWAP2 SWAP1 PUSH1 0x0 MSTORE PUSH1 0x20 PUSH1 0x0 SHA3 SWAP1 JUMPDEST DUP2 PUSH1 0x0 SWAP1 SLOAD SWAP1 PUSH2 0x100 EXP SWAP1 DIV PUSH20 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF AND PUSH20 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF AND DUP2 MSTORE PUSH1 0x20 ADD SWAP1 PUSH1 0x1 ADD SWAP1 DUP1 DUP4 GT PUSH3 0xB2 JUMPI JUMPDEST POP POP POP POP POP PUSH1 0x1 PUSH1 0x0 PUSH3 0x128 PUSH5 0x100000000 MUL PUSH3 0x1D46 OR PUSH5 0x100000000 SWAP1 DIV JUMP JUMPDEST JUMPDEST POP PUSH3 0x330 JUMP JUMPDEST PUSH1 0x0 PUSH1 0x1 SLOAD GT ISZERO PUSH3 0x13A JUMPI PUSH1 0x0 PUSH1 0x0 REVERT JUMPDEST PUSH3 0x159 DUP2 PUSH3 0x180 PUSH5 0x100000000 MUL PUSH3 0x1D71 OR PUSH5 0x100000000 SWAP1 DIV JUMP JUMPDEST PUSH3 0x179 DUP4 DUP4 PUSH3 0x1C2 PUSH5 0x100000000 MUL PUSH3 0x1D9C OR PUSH5 0x100000000 SWAP1 DIV JUMP JUMPDEST JUMPDEST JUMPDEST POP POP POP JUMP JUMPDEST PUSH1 0x0 PUSH1 0x1 SLOAD GT ISZERO PUSH3 0x192 JUMPI PUSH1 0x0 PUSH1 0x0 REVERT JUMPDEST DUP1 PUSH1 0x2 DUP2 SWAP1 SSTORE POP PUSH3 0x1B7 PUSH3 0x2C1 PUSH5 0x100000000 MUL PUSH3 0x1BCF OR PUSH5 0x100000000 SWAP1 DIV JUMP JUMPDEST PUSH1 0x4 DUP2 SWAP1 SSTORE POP JUMPDEST JUMPDEST POP JUMP JUMPDEST PUSH1 0x0 PUSH1 0x0 PUSH1 0x1 SLOAD GT ISZERO PUSH3 0x1D6 JUMPI PUSH1 0x0 PUSH1 0x0 REVERT JUMPDEST PUSH1 0x0 DUP3 GT ISZERO ISZERO PUSH3 0x1E7 JUMPI PUSH1 0x0 PUSH1 0x0 REVERT JUMPDEST DUP2 DUP4 MLOAD LT ISZERO ISZERO ISZERO PUSH3 0x1F9 JUMPI PUSH1 0x0 PUSH1 0x0 REVERT JUMPDEST DUP3 MLOAD PUSH1 0x1 DUP2 SWAP1 SSTORE POP PUSH1 0x0 SWAP1 POP JUMPDEST DUP3 MLOAD DUP2 LT ISZERO PUSH3 0x2B3 JUMPI DUP3 DUP2 DUP2 MLOAD DUP2 LT ISZERO ISZERO PUSH3 0x21F JUMPI INVALID JUMPDEST SWAP1 PUSH1 0x20 ADD SWAP1 PUSH1 0x20 MUL ADD MLOAD PUSH20 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF AND PUSH1 0x5 DUP3 PUSH1 0x1 ADD PUSH2 0x100 DUP2 LT ISZERO ISZERO PUSH3 0x253 JUMPI INVALID JUMPDEST ADD PUSH1 0x0 JUMPDEST POP DUP2 SWAP1 SSTORE POP DUP1 PUSH1 0x1 ADD PUSH2 0x105 PUSH1 0x0 DUP6 DUP5 DUP2 MLOAD DUP2 LT ISZERO ISZERO PUSH3 0x274 JUMPI INVALID JUMPDEST SWAP1 PUSH1 0x20 ADD SWAP1 PUSH1 0x20 MUL ADD MLOAD PUSH20 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF AND DUP2 MSTORE PUSH1 0x20 ADD SWAP1 DUP2 MSTORE PUSH1 0x20 ADD PUSH1 0x0 SHA3 DUP2 SWAP1 SSTORE POP JUMPDEST DUP1 PUSH1 0x1 ADD SWAP1 POP PUSH3 0x206 JUMP JUMPDEST DUP2 PUSH1 0x0 DUP2 SWAP1 SSTORE POP JUMPDEST JUMPDEST POP POP POP JUMP JUMPDEST PUSH1 0x0 PUSH3 0x15180 TIMESTAMP DUP2 ISZERO ISZERO PUSH3 0x2D2 JUMPI INVALID JUMPDEST DIV SWAP1 POP JUMPDEST SWAP1 JUMP JUMPDEST DUP2 SLOAD DUP2 DUP4 SSTORE DUP2 DUP2 ISZERO GT PUSH3 0x303 JUMPI DUP2 DUP4 PUSH1 0x0 MSTORE PUSH1 0x20 PUSH1 0x0 SHA3 SWAP2 DUP3 ADD SWAP2 ADD PUSH3 0x302 SWAP2 SWAP1 PUSH3 0x308 JUMP JUMPDEST JUMPDEST POP POP POP JUMP JUMPDEST PUSH3 0x32D SWAP2 SWAP1 JUMPDEST DUP1 DUP3 GT ISZERO PUSH3 0x329 JUMPI PUSH1 0x0 DUP2 PUSH1 0x0 SWAP1 SSTORE POP PUSH1 0x1 ADD PUSH3 0x30F JUMP JUMPDEST POP SWAP1 JUMP JUMPDEST SWAP1 JUMP JUMPDEST PUSH2 0x1EBF DUP1 PUSH3 0x340 PUSH1 0x0 CODECOPY PUSH1 0x0 RETURN STOP PUSH1 0x60 PUSH1 0x40 MSTORE CALLDATASIZE ISZERO PUSH2 0xEF JUMPI PUSH1 0x0 CALLDATALOAD PUSH29 0x100000000000000000000000000000000000000000000000000000000 SWAP1 DIV PUSH4 0xFFFFFFFF AND DUP1 PUSH4 0x173825D9 EQ PUSH2 0x16D JUMPI DUP1 PUSH4 0x2F54BF6E EQ PUSH2 0x1A3 JUMPI DUP1 PUSH4 0x4123CB6B EQ PUSH2 0x1F1 JUMPI DUP1 PUSH4 0x52375093 EQ PUSH2 0x217 JUMPI DUP1 PUSH4 0x5C5
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"sourceMap": "2715:10853:0:-;;;3523:112;;;;;;;3552:18;3574:8;:27;;;;;;;;;;;:::i;:::-;;;;;;;;;;;3596:3;3574:27;;;;;;;;;;;;;;;;;;;;;;;3605:26;3616:8;3605:26;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;3626:1;3629;3605:10;;;;;:26;;;:::i;:::-;3523:112;;2715:10853;;7697:168;7585:1;7571:11;;:15;7567:26;;;7588:5;;;7567:26;7800:23;7813:9;7800:12;;;;;:23;;;:::i;:::-;7827:34;7842:7;7851:9;7827:14;;;;;:34;;;:::i;:::-;7595:1;7697:168;;;;:::o;6966:115::-;7585:1;7571:11;;:15;7567:26;;;7588:5;;;7567:26;7048:6;7033:12;:21;;;;7070:7;:5;;;;;:7;;;:::i;:::-;7058:9;:19;;;;7595:1;6966:115;;:::o;3977:349::-;4171:6;7585:1;7571:11;;:15;7567:26;;;7588:5;;;7567:26;4088:1;4076:9;:13;4068:22;;;;;;;;4120:9;4102:7;:14;:27;;4094:36;;;;;;;;4148:7;:14;4134:11;:28;;;;4180:1;4171:10;;4166:131;4187:7;:14;4183:1;:18;4166:131;;;4238:7;4246:1;4238:10;;;;;;;;;;;;;;;;;;4233:16;;4215:8;4228:1;4224;:5;4215:15;;;;;;;;;;;;:34;;;;;4291:1;4287;:5;4254:12;:30;4272:7;4280:1;4272:10;;;;;;;;;;;;;;;;;;4267:16;;4254:30;;;;;;;;;;;:38;;;;4166:131;4203:3;;;;;4166:131;;;4313:9;4300:10;:22;;;;7595:1;3977:349;;;;:::o;12529:73::-;12572:4;12593:6;12587:3;:12;;;;;;;;12580:19;;12529:73;;:::o;2715:10853::-;;;;;;;;;;;;;;;;;;;;;;;;;;;;:::i;:::-;;;;;:::o;:::-;;;;;;;;;;;;;;;;;;;;;;;;;;;:::o;:::-;;;;;;;",
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"linkReferences": {}
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}
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```
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To verify the byte-code above, a patched version is deployed at
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[`0x21C9E434c669c4d73f55215A6F2130A185E127AC`](https://etherscan.io/address/0x21C9E434c669c4d73f55215A6F2130A185E127AC#code)
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to be reviewed. The compiler settings used can be extracted from the following
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meta-data:
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```
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{"compiler":{"version":"0.4.10+commit.f0d539ae"},"language":"Solidity","output":{"abi":[{"constant":false,"inputs":[{"name":"_owner","type":"address"}],"name":"removeOwner","outputs":[],"payable":false,"type":"function"},{"constant":true,"inputs":[{"name":"_addr","type":"address"}],"name":"isOwner","outputs":[{"name":"","type":"bool"}],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"m_numOwners","outputs":[{"name":"","type":"uint256"}],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"m_lastDay","outputs":[{"name":"","type":"uint256"}],"payable":false,"type":"function"},{"constant":false,"inputs":[],"name":"resetSpentToday","outputs":[],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"m_spentToday","outputs":[{"name":"","type":"uint256"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"_owner","type":"address"}],"name":"addOwner","outputs":[],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"m_required","outputs":[{"name":"","type":"uint256"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"_h","type":"bytes32"}],"name":"confirm","outputs":[{"name":"o_success","type":"bool"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"_newLimit","type":"uint256"}],"name":"setDailyLimit","outputs":[],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"_to","type":"address"},{"name":"_value","type":"uint256"},{"name":"_data","type":"bytes"}],"name":"execute","outputs":[{"name":"o_hash","type":"bytes32"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"_operation","type":"bytes32"}],"name":"revoke","outputs":[],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"_newRequired","type":"uint256"}],"name":"changeRequirement","outputs":[],"payable":false,"type":"function"},{"constant":true,"inputs":[{"name":"_operation","type":"bytes32"},{"name":"_owner","type":"address"}],"name":"hasConfirmed","outputs":[{"name":"","type":"bool"}],"payable":false,"type":"function"},{"constant":true,"inputs":[{"name":"ownerIndex","type":"uint256"}],"name":"getOwner","outputs":[{"name":"","type":"address"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"_from","type":"address"},{"name":"_to","type":"address"}],"name":"changeOwner","outputs":[],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"m_dailyLimit","outputs":[{"name":"","type":"uint256"}],"payable":false,"type":"function"},{"inputs":[],"payable":false,"type":"constructor"},{"payable":true,"type":"fallback"},{"anonymous":false,"inputs":[{"indexed":false,"name":"owner","type":"address"},{"indexed":false,"name":"operation","type":"bytes32"}],"name":"Confirmation","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"name":"owner","type":"address"},{"indexed":false,"name":"operation","type":"bytes32"}],"name":"Revoke","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"name":"oldOwner","type":"address"},{"indexed":false,"name":"newOwner","type":"address"}],"name":"OwnerChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"name":"newOwner","type":"address"}],"name":"OwnerAdded","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"name":"oldOwner","type":"address"}],"name":"OwnerRemoved","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"name":"newRequirement","type":"uint256"}],"name":"RequirementChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"name":"_from","type":"address"},{"indexed":false,"name":"value","type":"uint256"}],"name":"Deposit","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"name":"owner","type":"address"},{"indexed":false,"name":"value","type":"uint256"},{"indexed":false,"name":"to","type":"address"},{"indexed":false,"name":"data","type":"bytes"},{"indexed":false,"name":"created","type":"address"}],"name":"SingleTransact","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"name":"owner","type":"address"},{"indexe
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```
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The differences to the originally deployed contract code can be reviewed at:
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* [parity-contracts/0x863df6bfa4#2](https://github.com/parity-contracts/0x863df6bfa4/pull/2):
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Remove the `selfdestruct()`
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* [parity-contracts/0x863df6bfa4#3](https://github.com/parity-contracts/0x863df6bfa4/pull/3):
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Initialize the library owner to `0x0`
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The following sections propose two equivalent specifications, 999a and 999b,
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which technically achieve the same results. To implement this proposal only one
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of them has to be applied.
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### Direct State Transition via Bytecode (999a)
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At `CNSTNTNPL_FORK_BLKNUM`, directly recreate the account
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`0x863DF6BFa4469f3ead0bE8f9F2AAE51c91A907b4` with the following parameters:
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* Nonce: `0x1`
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* Code:
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```
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
|
||
|
|
```
|
||
|
|
|
||
|
|
* Storage:
|
||
|
|
* `0x0000000000000000000000000000000000000000000000000000000000000000`:
|
||
|
|
`0x0000000000000000000000000000000000000000000000000000000000000001`
|
||
|
|
* `0x0000000000000000000000000000000000000000000000000000000000000001`:
|
||
|
|
`0x0000000000000000000000000000000000000000000000000000000000000001`
|
||
|
|
* `0x0000000000000000000000000000000000000000000000000000000000000004`:
|
||
|
|
`0x00000000000000000000000000000000000000000000000000000000000044e1`
|
||
|
|
* `0xa5baec7d73105a3c7298203bb205bbc41b63fa384ae73a6016b890a7ca29ae2d`:
|
||
|
|
`0x0000000000000000000000000000000000000000000000000000000000000001`
|
||
|
|
|
||
|
|
The balance of the account shall be left unchanged.
|
||
|
|
|
||
|
|
### Alternate Specification via Codehash (999b)
|
||
|
|
At `CNSTNTNPL_FORK_BLKNUM`, directly recreate the account
|
||
|
|
`0x863DF6BFa4469f3ead0bE8f9F2AAE51c91A907b4` with the following parameters:
|
||
|
|
|
||
|
|
* Nonce: `0x1`
|
||
|
|
* Storage:
|
||
|
|
* `0x0000000000000000000000000000000000000000000000000000000000000000`:
|
||
|
|
`0x0000000000000000000000000000000000000000000000000000000000000001`
|
||
|
|
* `0x0000000000000000000000000000000000000000000000000000000000000001`:
|
||
|
|
`0x0000000000000000000000000000000000000000000000000000000000000001`
|
||
|
|
* `0x0000000000000000000000000000000000000000000000000000000000000004`:
|
||
|
|
`0x00000000000000000000000000000000000000000000000000000000000044e1`
|
||
|
|
* `0xa5baec7d73105a3c7298203bb205bbc41b63fa384ae73a6016b890a7ca29ae2d`:
|
||
|
|
`0x0000000000000000000000000000000000000000000000000000000000000001`
|
||
|
|
|
||
|
|
In addition, the codehash at that address shall be replaced by the codehash at
|
||
|
|
address `0x21C9E434c669c4d73f55215A6F2130A185E127AC`. The codehash is
|
||
|
|
`0x6209d55547da7b035d54ef8d73275e863d3072b91da6ace1614fa6381f4e2c09`. The
|
||
|
|
balance of the account shall be left unchanged.
|
||
|
|
|
||
|
|
## Rationale
|
||
|
|
The design decision to restore the `WalletLibrary` contract code in a single
|
||
|
|
state transition was made after lengthy discussions of
|
||
|
|
[alternate proposals](https://gist.github.com/5chdn/a9bb8617cc8523a030126a3d1c60baf3)
|
||
|
|
that explored different ways to improve the Ethereum protocol to allow contract
|
||
|
|
revivals by adding different built-in contracts. It was eventually concluded
|
||
|
|
that all of these proposals changing the EVM semantics around self-destructed
|
||
|
|
contracts were introducing unwanted side-effects and
|
||
|
|
[potential risks](https://medium.com/@weka/on-paritys-proposed-changes-to-selfdestruct-behaviour-c3f0e5bc0f49)
|
||
|
|
to the existing smart-contract ecosystem on the Ethereum platform.
|
||
|
|
|
||
|
|
The total supply of Ether is neither changed nor does this proposal require the
|
||
|
|
transfer of any tokens or assets including Ether. It is assumed that this change
|
||
|
|
is aligned with the interests both of (A) Parity Technologies that intended to
|
||
|
|
provide a smart-contracts library for multi-signature wallets to last forever
|
||
|
|
for its users and (B) the users of the multi-signature wallets that meant to
|
||
|
|
safely store their assets in a contract accessible any time they desire. Lastly,
|
||
|
|
the client-side implementation cost of this proposal is estimated to be low. A
|
||
|
|
sample implementation will be attached and linked in the following sections.
|
||
|
|
|
||
|
|
## Backwards Compatibility
|
||
|
|
This proposal introduces backwards incompatibilities in the state of the
|
||
|
|
contract at `0x863DF6BFa4469f3ead0bE8f9F2AAE51c91A907b4`. The Ethereum protocol
|
||
|
|
does not allow the restoration of self-destructed contracts. To implement this
|
||
|
|
on the Ethereum blockchain, it is recommended to add the necessary state
|
||
|
|
transition in a future hard-fork at a well-defined block number, e.g.,
|
||
|
|
`CNSTNTNPL_FORK_BLKNUM` for the Constantinople milestone which is supposed to be
|
||
|
|
the next scheduled hard-fork on the Ethereum road-map.
|
||
|
|
|
||
|
|
## Implementation
|
||
|
|
A proof-of-concept implementation is available for the Parity client on branch
|
||
|
|
[`a5-eip999-poc`](https://github.com/paritytech/parity/compare/a5-eip999-poc)
|
||
|
|
([#8406](https://github.com/paritytech/parity/pull/8406)). A sample chain
|
||
|
|
configuration for Parity can be found at the same branch in
|
||
|
|
[`multisig_test.json`](https://github.com/paritytech/parity/blob/891e633021eec78dd62104bf5a99af50f66b06c7/ethcore/res/ethereum/multisig_test.json#L38-L51)
|
||
|
|
describing the state change as specified above.
|
||
|
|
|
||
|
|
## Copyright
|
||
|
|
Copyright and related rights waived via
|
||
|
|
[CC0](https://creativecommons.org/publicdomain/zero/1.0/).
|