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Expanse Byzantium update w/ correct metropolis difficulty increment divisor (#7463) 

* Byzantium Update for Expanse

Here the changes go. Hope I didnt miss anything.

* expip2 changes - update duration limit

* Fix missing EXPIP-2 fields

* Format numbers as hex

* Fix compilation errors

* Group expanse chain spec fields together

* Set metropolisDifficultyIncrementDivisor for Expanse

* Revert #7437

* Add Expanse block 900_000 hash checkpoint
This commit is contained in:
Afri Schoedon 2018-01-05 13:49:07 +01:00 committed by GitHub
parent c8ad8aeac4
commit 36e230ee16
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GPG Key ID: 4AEE18F83AFDEB23
20 changed files with 182 additions and 20 deletions
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92
ethcore/res/ethereum/expanse.json Normal file
View File

@ -0,0 +1,92 @@
{
"name": "Expanse",
"dataDir": "expanse",
"engine": {
"Ethash": {
"params": {
"minimumDifficulty": "0x020000",
"difficultyBoundDivisor": "0x0800",
"difficultyIncrementDivisor": "0x3C",
"durationLimit": "0x3C",
"blockReward": "0x6f05b59d3b200000",
"homesteadTransition": "0x30d40",
"difficultyHardforkTransition": "0x59d9",
"difficultyHardforkBoundDivisor": "0x0200",
"bombDefuseTransition": "0x30d40",
"eip150Transition": "0x927C0",
"eip160Transition": "0x927C0",
"eip161abcTransition": "0x927C0",
"eip161dTransition": "0x927C0",
"eip100bTransition": "0xC3500",
"metropolisDifficultyIncrementDivisor": "0x1E",
"eip649Transition": "0xC3500",
"eip649Reward": "0x3782DACE9D900000",
"expip2Transition": "0xC3500",
"expip2DurationLimit": "0x1E"
}
}
},
"params": {
"gasLimitBoundDivisor": "0x0400",
"registrar" : "0x6c221ca53705f3497ec90ca7b84c59ae7382fc21",
"accountStartNonce": "0x00",
"maximumExtraDataSize": "0x20",
"minGasLimit": "0x1388",
"networkID": "0x1",
"chainID": "0x2",
"forkBlock": "0xDBBA0",
"forkCanonHash": "0x8e7bed51e24f5174090408664ac476b90b5e1199a947af7442f1ac88263fc8c7",
"subprotocolName": "exp",
"eip98Transition": "0x7fffffffffffff",
"eip86Transition": "0x7fffffffffffff",
"eip155Transition": "0x927C0",
"eip140Transition": "0xC3500",
"eip211Transition": "0xC3500",
"eip214Transition": "0xC3500",
"eip658Transition": "0xC3500"
},
"genesis": {
"seal": {
"ethereum": {
"nonce": "0x214652414e4b4f21",
"mixHash": "0x0000000000000000000000000000000000000000000000000000000000000000"
}
},
"difficulty": "0x40000000",
"author": "0x93decab0cd745598860f782ac1e8f046cb99e898",
"timestamp": "0x00",
"parentHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
"extraData": "0x4672616e6b6f497346726565646f6d",
"gasLimit": "0x1388"
},
"nodes": [
"enode://7f335a047654f3e70d6f91312a7cf89c39704011f1a584e2698250db3d63817e74b88e26b7854111e16b2c9d0c7173c05419aeee2d0321850227b126d8b1be3f@46.101.156.249:42786",
"enode://df872f81e25f72356152b44cab662caf1f2e57c3a156ecd20e9ac9246272af68a2031b4239a0bc831f2c6ab34733a041464d46b3ea36dce88d6c11714446e06b@178.62.208.109:42786",
"enode://96d3919b903e7f5ad59ac2f73c43be9172d9d27e2771355db03fd194732b795829a31fe2ea6de109d0804786c39a807e155f065b4b94c6fce167becd0ac02383@45.55.22.34:42786",
"enode://5f6c625bf287e3c08aad568de42d868781e961cbda805c8397cfb7be97e229419bef9a5a25a75f97632787106bba8a7caf9060fab3887ad2cfbeb182ab0f433f@46.101.182.53:42786",
"enode://d33a8d4c2c38a08971ed975b750f21d54c927c0bf7415931e214465a8d01651ecffe4401e1db913f398383381413c78105656d665d83f385244ab302d6138414@128.199.183.48:42786",
"enode://f6f0d6b9b7d02ec9e8e4a16e38675f3621ea5e69860c739a65c1597ca28aefb3cec7a6d84e471ac927d42a1b64c1cbdefad75e7ce8872d57548ddcece20afdd1@159.203.64.95:42786"
],
"accounts": {
"0000000000000000000000000000000000000001": { "builtin": { "name": "ecrecover", "pricing": { "linear": { "base": 3000, "word": 0 } } } },
"0000000000000000000000000000000000000002": { "builtin": { "name": "sha256", "pricing": { "linear": { "base": 60, "word": 12 } } } },
"0000000000000000000000000000000000000003": { "builtin": { "name": "ripemd160", "pricing": { "linear": { "base": 600, "word": 120 } } } },
"0000000000000000000000000000000000000004": { "builtin": { "name": "identity", "pricing": { "linear": { "base": 15, "word": 3 } } } },
"0000000000000000000000000000000000000005": { "builtin": { "name": "modexp", "activate_at": "0xC3500", "pricing": { "modexp": { "divisor": 20 } } } },
"0000000000000000000000000000000000000006": { "builtin": { "name": "alt_bn128_add", "activate_at": "0xC3500", "pricing": { "linear": { "base": 500, "word": 0 } } } },
"0000000000000000000000000000000000000007": { "builtin": { "name": "alt_bn128_mul", "activate_at": "0xC3500", "pricing": { "linear": { "base": 40000, "word": 0 } } } },
"0000000000000000000000000000000000000008": { "builtin": { "name": "alt_bn128_pairing", "activate_at": "0xC3500", "pricing": { "alt_bn128_pairing": { "base": 100000, "pair": 80000 } } } },
"bb94f0ceb32257275b2a7a9c094c13e469b4563e": {
"balance": "10000000000000000000000000"
},
"15656715068ab0dbdf0ab00748a8a19e40f28192": {
"balance": "1000000000000000000000000"
},
"c075fa11f85bda3aaba67106226aaf086ac16f4e": {
"balance": "100000000000000000000000"
},
"93decab0cd745598860f782ac1e8f046cb99e898": {
"balance": "10000000000000000000000"
}
}
}

17
ethcore/src/ethereum/ethash.rs
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@ -90,6 +90,10 @@ pub struct EthashParams {
pub eip649_delay: u64,
/// EIP-649 base reward.
pub eip649_reward: Option<U256>,
/// EXPIP-2 block height
pub expip2_transition: u64,
/// EXPIP-2 duration limit
pub expip2_duration_limit: u64,
}
impl From<ethjson::spec::EthashParams> for EthashParams {
@ -118,6 +122,8 @@ impl From<ethjson::spec::EthashParams> for EthashParams {
eip649_transition: p.eip649_transition.map_or(u64::max_value(), Into::into),
eip649_delay: p.eip649_delay.map_or(DEFAULT_EIP649_DELAY, Into::into),
eip649_reward: p.eip649_reward.map(Into::into),
expip2_transition: p.expip2_transition.map_or(u64::max_value(), Into::into),
expip2_duration_limit: p.expip2_duration_limit.map_or(30, Into::into),
}
}
}
@ -354,7 +360,13 @@ impl Ethash {
self.ethash_params.difficulty_bound_divisor
};
let duration_limit = self.ethash_params.duration_limit;
let expip2_hardfork = header.number() >= self.ethash_params.expip2_transition;
let duration_limit = if expip2_hardfork {
self.ethash_params.expip2_duration_limit
} else {
self.ethash_params.duration_limit
};
let frontier_limit = self.ethash_params.homestead_transition;
let mut target = if header.number() < frontier_limit {
@ -363,8 +375,7 @@ impl Ethash {
} else {
*parent.difficulty() + (*parent.difficulty() / difficulty_bound_divisor)
}
}
else {
} else {
trace!(target: "ethash", "Calculating difficulty parent.difficulty={}, header.timestamp={}, parent.timestamp={}", parent.difficulty(), header.timestamp(), parent.timestamp());
//block_diff = parent_diff + parent_diff // 2048 * max(1 - (block_timestamp - parent_timestamp) // 10, -99)
let (increment_divisor, threshold) = if header.number() < self.ethash_params.eip100b_transition {

5
ethcore/src/ethereum/mod.rs
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@ -65,6 +65,11 @@ pub fn new_classic<'a, T: Into<SpecParams<'a>>>(params: T) -> Spec {
load(params.into(), include_bytes!("../../res/ethereum/classic.json"))
}
/// Create a new Expanse mainnet chain spec.
pub fn new_expanse<'a, T: Into<SpecParams<'a>>>(params: T) -> Spec {
load(params.into(), include_bytes!("../../res/ethereum/expanse.json"))
}
/// Create a new Musicoin mainnet chain spec.
pub fn new_musicoin<'a, T: Into<SpecParams<'a>>>(params: T) -> Spec {
load(params.into(), include_bytes!("../../res/ethereum/musicoin.json"))

2
ethcore/src/tests/helpers.rs
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@ -385,5 +385,7 @@ pub fn get_default_ethash_params() -> EthashParams {
eip649_transition: u64::max_value(),
eip649_delay: 3_000_000,
eip649_reward: None,
expip2_transition: u64::max_value(),
expip2_duration_limit: 30,
}
}

3
js-old/src/i18n/_default/settings.js
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@ -1,4 +1,4 @@
// Copyright 2015-2018 Parity Technologies (UK) Ltd.
// Copyright 2015-2017 Parity Technologies (UK) Ltd.
// This file is part of Parity.
// Parity is free software: you can redistribute it and/or modify
@ -25,6 +25,7 @@ export default {
chains: {
chain_classic: `Parity syncs to the Ethereum Classic network`,
chain_dev: `Parity uses a local development chain`,
chain_expanse: `Parity syncs to the Expanse network`,
chain_foundation: `Parity syncs to the Ethereum network launched by the Ethereum Foundation`,
chain_kovan: `Parity syncs to the Kovan test network`,
chain_olympic: `Parity syncs to the Olympic test network`,

3
js-old/src/i18n/nl/settings.js
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@ -1,4 +1,4 @@
// Copyright 2015-2018 Parity Technologies (UK) Ltd.
// Copyright 2015-2017 Parity Technologies (UK) Ltd.
// This file is part of Parity.
// Parity is free software: you can redistribute it and/or modify
@ -25,6 +25,7 @@ export default {
chains: {
chain_classic: `Parity synchroniseert met het Ethereum Classic netwerk`,
chain_dev: `Parity gebruikt een lokale ontwikkelaars chain`,
chain_expanse: `Parity synchroniseert met het Expanse netwerk`,
chain_foundation: `Parity synchroniseert met het Ethereum netwerk wat door de Ethereum Foundation is uitgebracht`,
chain_kovan: `Parity synchroniseert met het Kovan test netwerk`,
chain_olympic: `Parity synchroniseert met het Olympic test netwerk`,

3
js-old/src/i18n/zh-Hant-TW/settings.js
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@ -1,4 +1,4 @@
// Copyright 2015-2018 Parity Technologies (UK) Ltd.
// Copyright 2015-2017 Parity Technologies (UK) Ltd.
// This file is part of Parity.
// Parity is free software: you can redistribute it and/or modify
@ -29,6 +29,7 @@ export default {
chains: {
chain_classic: `將Parity同步至以太坊經典網路`, // Parity syncs to the Ethereum Classic network
chain_dev: `將Parity使用一條本地開發用區塊鏈`, // Parity uses a local development chain
chain_expanse: `將Parity同步至Expanse網路`, // Parity syncs to the Expanse network
chain_foundation: `將Parity同步至以太坊基金會發起的以太坊網路`, // Parity syncs to the Ethereum network launched by the Ethereum Foundation
chain_kovan: `將Parity同步至Kovan測試網路`, // Parity syncs to the Kovan test network
chain_olympic: `將Parity同步至Olympic測試網路`, // Parity syncs to the Olympic test network

3
js-old/src/i18n/zh/settings.js
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@ -1,4 +1,4 @@
// Copyright 2015-2018 Parity Technologies (UK) Ltd.
// Copyright 2015-2017 Parity Technologies (UK) Ltd.
// This file is part of Parity.
// Parity is free software: you can redistribute it and/or modify
@ -29,6 +29,7 @@ export default {
chains: {
chain_classic: `将Parity同步至以太坊经典网络`, // Parity syncs to the Ethereum Classic network
chain_dev: `将Parity使用一条本地开发用区块链`, // Parity uses a local development chain
chain_expanse: `将Parity同步至Expanse网络`, // Parity syncs to the Expanse network
chain_foundation: `将Parity同步至以太坊基金会发起的以太坊网络`, // Parity syncs to the Ethereum network launched by the Ethereum Foundation
chain_kovan: `将Parity同步至Kovan测试网络`, // Parity syncs to the Kovan test network
chain_olympic: `将Parity同步至Olympic测试网络`, // Parity syncs to the Olympic test network

8
js-old/src/ui/CurrencySymbol/currencySymbol.example.js
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@ -1,4 +1,4 @@
// Copyright 2015-2018 Parity Technologies (UK) Ltd.
// Copyright 2015-2017 Parity Technologies (UK) Ltd.
// This file is part of Parity.
// Parity is free software: you can redistribute it and/or modify
@ -39,6 +39,12 @@ export default class CurrencySymbolExample extends Component {
netChain='classic'
/>
</PlaygroundExample>
<PlaygroundExample name='EXP Currency Symbol'>
<CurrencySymbol
netChain='expanse'
/>
</PlaygroundExample>
</div>
);
}

6
js-old/src/ui/CurrencySymbol/currencySymbol.js
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@ -1,4 +1,4 @@
// Copyright 2015-2018 Parity Technologies (UK) Ltd.
// Copyright 2015-2017 Parity Technologies (UK) Ltd.
// This file is part of Parity.
// Parity is free software: you can redistribute it and/or modify
@ -19,6 +19,7 @@ import { connect } from 'react-redux';
const SYMBOL_ETC = 'ETC';
const SYMBOL_ETH = 'ETH';
const SYMBOL_EXP = 'EXP';
export class CurrencySymbol extends Component {
static propTypes = {
@ -41,6 +42,9 @@ export class CurrencySymbol extends Component {
case 'classic':
return SYMBOL_ETC;
case 'expanse':
return SYMBOL_EXP;
default:
return SYMBOL_ETH;
}

10
js-old/src/ui/CurrencySymbol/currencySymbol.spec.js
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@ -1,4 +1,4 @@
// Copyright 2015-2018 Parity Technologies (UK) Ltd.
// Copyright 2015-2017 Parity Technologies (UK) Ltd.
// This file is part of Parity.
// Parity is free software: you can redistribute it and/or modify
@ -70,6 +70,10 @@ describe('ui/CurrencySymbol', () => {
expect(render('classic').text()).equal('ETC');
});
it('renders EXP for expanse', () => {
expect(render('expanse').text()).equal('EXP');
});
it('renders ETH as default', () => {
expect(render('somethingElse').text()).equal('ETH');
});
@ -87,5 +91,9 @@ describe('ui/CurrencySymbol', () => {
it('render ETC', () => {
expect(render('classic').instance().renderSymbol()).equal('ETC');
});
it('render EXP', () => {
expect(render('expanse').instance().renderSymbol()).equal('EXP');
});
});
});

10
js-old/src/views/Settings/Parity/parity.js
View File

@ -1,4 +1,4 @@
// Copyright 2015-2018 Parity Technologies (UK) Ltd.
// Copyright 2015-2017 Parity Technologies (UK) Ltd.
// This file is part of Parity.
// Parity is free software: you can redistribute it and/or modify
@ -253,6 +253,14 @@ export default class Parity extends Component {
/>
))
}
{
this.renderItem('expanse', (
<FormattedMessage
id='settings.parity.chains.chain_expanse'
defaultMessage='Parity syncs to the Expanse network'
/>
))
}
{
this.renderItem('dev', (
<FormattedMessage

3
js/i18n/_default/settings.js
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@ -1,4 +1,4 @@
// Copyright 2015-2018 Parity Technologies (UK) Ltd.
// Copyright 2015-2017 Parity Technologies (UK) Ltd.
// This file is part of Parity.
// Parity is free software: you can redistribute it and/or modify
@ -25,6 +25,7 @@ export default {
chains: {
chain_classic: `Parity syncs to the Ethereum Classic network`,
chain_dev: `Parity uses a local development chain`,
chain_expanse: `Parity syncs to the Expanse network`,
chain_musicoin: `Parity syncs to the Musicoin network`,
chain_foundation: `Parity syncs to the Ethereum network launched by the Ethereum Foundation`,
chain_kovan: `Parity syncs to the Kovan test network`,

3
js/i18n/nl/settings.js
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@ -1,4 +1,4 @@
// Copyright 2015-2018 Parity Technologies (UK) Ltd.
// Copyright 2015-2017 Parity Technologies (UK) Ltd.
// This file is part of Parity.
// Parity is free software: you can redistribute it and/or modify
@ -25,6 +25,7 @@ export default {
chains: {
chain_classic: `Parity synchroniseert met het Ethereum Classic netwerk`,
chain_dev: `Parity gebruikt een lokale ontwikkelaars chain`,
chain_expanse: `Parity synchroniseert met het Expanse netwerk`,
chain_musicoin: `Parity synchroniseert met het Musicoin netwerk`,
chain_foundation: `Parity synchroniseert met het Ethereum netwerk wat door de Ethereum Foundation is uitgebracht`,
chain_kovan: `Parity synchroniseert met het Kovan test netwerk`,

3
js/i18n/zh-Hant-TW/settings.js
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@ -1,4 +1,4 @@
// Copyright 2015-2018 Parity Technologies (UK) Ltd.
// Copyright 2015-2017 Parity Technologies (UK) Ltd.
// This file is part of Parity.
// Parity is free software: you can redistribute it and/or modify
@ -29,6 +29,7 @@ export default {
chains: {
chain_classic: `將Parity同步至以太坊經典網路`, // Parity syncs to the Ethereum Classic network
chain_dev: `將Parity使用一條本地開發用區塊鏈`, // Parity uses a local development chain
chain_expanse: `將Parity同步至Expanse網路`, // Parity syncs to the Expanse network
chain_musicoin: `將Parity同步至Musicoin網路`, // Parity syncs to the Musicoin network
chain_foundation: `將Parity同步至以太坊基金會發起的以太坊網路`, // Parity syncs to the Ethereum network launched by the Ethereum Foundation
chain_kovan: `將Parity同步至Kovan測試網路`, // Parity syncs to the Kovan test network

3
js/i18n/zh/settings.js
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@ -1,4 +1,4 @@
// Copyright 2015-2018 Parity Technologies (UK) Ltd.
// Copyright 2015-2017 Parity Technologies (UK) Ltd.
// This file is part of Parity.
// Parity is free software: you can redistribute it and/or modify
@ -29,6 +29,7 @@ export default {
chains: {
chain_classic: `将Parity同步至以太坊经典网络`, // Parity syncs to the Ethereum Classic network
chain_dev: `将Parity使用一条本地开发用区块链`, // Parity uses a local development chain
chain_expanse: `将Parity同步至Expanse网络`, // Parity syncs to the Expanse network
chain_musicoin: `将Parity同步至Musicoin网络`, // Parity syncs to the Musicoin network
chain_foundation: `将Parity同步至以太坊基金会发起的以太坊网络`, // Parity syncs to the Ethereum network launched by the Ethereum Foundation
chain_kovan: `将Parity同步至Kovan测试网络`, // Parity syncs to the Kovan test network

12
json/src/spec/ethash.rs
View File

@ -125,6 +125,14 @@ pub struct EthashParams {
/// EIP-649 base reward.
#[serde(rename="eip649Reward")]
pub eip649_reward: Option<Uint>,
/// EXPIP-2 block height
#[serde(rename="expip2Transition")]
pub expip2_transition: Option<Uint>,
/// EXPIP-2 duration limit
#[serde(rename="expip2DurationLimit")]
pub expip2_duration_limit: Option<Uint>,
}
/// Ethash engine deserialization.
@ -241,6 +249,8 @@ mod tests {
eip649_transition: None,
eip649_delay: None,
eip649_reward: None,
expip2_transition: None,
expip2_duration_limit: None,
}
});
}
@ -287,6 +297,8 @@ mod tests {
eip649_transition: None,
eip649_delay: None,
eip649_reward: None,
expip2_transition: None,
expip2_duration_limit: None,
}
});
}

4
parity/cli/mod.rs
View File

@ -1,4 +1,4 @@
// Copyright 2015-2018 Parity Technologies (UK) Ltd.
// Copyright 2015-2017 Parity Technologies (UK) Ltd.
// This file is part of Parity.
// Parity is free software: you can redistribute it and/or modify
@ -290,7 +290,7 @@ usage! {
ARG arg_chain: (String) = "foundation", or |c: &Config| otry!(c.parity).chain.clone(),
"--chain=[CHAIN]",
"Specify the blockchain type. CHAIN may be either a JSON chain specification file or olympic, frontier, homestead, mainnet, morden, ropsten, classic, musicoin, ellaism, testnet, kovan or dev.",
"Specify the blockchain type. CHAIN may be either a JSON chain specification file or olympic, frontier, homestead, mainnet, morden, ropsten, classic, expanse, musicoin, ellaism, testnet, kovan or dev.",
ARG arg_keys_path: (String) = "$BASE/keys", or |c: &Config| otry!(c.parity).keys_path.clone(),
"--keys-path=[PATH]",

8
parity/params.rs
View File

@ -1,4 +1,4 @@
// Copyright 2015-2018 Parity Technologies (UK) Ltd.
// Copyright 2015-2017 Parity Technologies (UK) Ltd.
// This file is part of Parity.
// Parity is free software: you can redistribute it and/or modify
@ -35,6 +35,7 @@ pub enum SpecType {
Kovan,
Olympic,
Classic,
Expanse,
Musicoin,
Ellaism,
Dev,
@ -58,6 +59,7 @@ impl str::FromStr for SpecType {
"ropsten" => SpecType::Ropsten,
"kovan" | "testnet" => SpecType::Kovan,
"olympic" => SpecType::Olympic,
"expanse" => SpecType::Expanse,
"musicoin" => SpecType::Musicoin,
"ellaism" => SpecType::Ellaism,
"dev" => SpecType::Dev,
@ -75,6 +77,7 @@ impl fmt::Display for SpecType {
SpecType::Ropsten => "ropsten",
SpecType::Olympic => "olympic",
SpecType::Classic => "classic",
SpecType::Expanse => "expanse",
SpecType::Musicoin => "musicoin",
SpecType::Ellaism => "ellaism",
SpecType::Kovan => "kovan",
@ -93,6 +96,7 @@ impl SpecType {
SpecType::Ropsten => Ok(ethereum::new_ropsten(params)),
SpecType::Olympic => Ok(ethereum::new_olympic(params)),
SpecType::Classic => Ok(ethereum::new_classic(params)),
SpecType::Expanse => Ok(ethereum::new_expanse(params)),
SpecType::Musicoin => Ok(ethereum::new_musicoin(params)),
SpecType::Ellaism => Ok(ethereum::new_ellaism(params)),
SpecType::Kovan => Ok(ethereum::new_kovan(params)),
@ -107,6 +111,7 @@ impl SpecType {
pub fn legacy_fork_name(&self) -> Option<String> {
match *self {
SpecType::Classic => Some("classic".to_owned()),
SpecType::Expanse => Some("expanse".to_owned()),
SpecType::Musicoin => Some("musicoin".to_owned()),
_ => None,
}
@ -359,6 +364,7 @@ mod tests {
assert_eq!(format!("{}", SpecType::Morden), "morden");
assert_eq!(format!("{}", SpecType::Olympic), "olympic");
assert_eq!(format!("{}", SpecType::Classic), "classic");
assert_eq!(format!("{}", SpecType::Expanse), "expanse");
assert_eq!(format!("{}", SpecType::Musicoin), "musicoin");
assert_eq!(format!("{}", SpecType::Kovan), "kovan");
assert_eq!(format!("{}", SpecType::Dev), "dev");

4
rpc/src/v1/traits/parity_set.rs
View File

@ -1,4 +1,4 @@
// Copyright 2015-2018 Parity Technologies (UK) Ltd.
// Copyright 2015-2017 Parity Technologies (UK) Ltd.
// This file is part of Parity.
// Parity is free software: you can redistribute it and/or modify
@ -87,7 +87,7 @@ build_rpc_trait! {
#[rpc(name = "parity_setMode")]
fn set_mode(&self, String) -> Result<bool>;
/// Set the network spec. Argument must be one of: "foundation", "ropsten", "morden", "kovan", "olympic", "classic", "dev", "musicoin" or a filename.
/// Set the network spec. Argument must be one of: "foundation", "ropsten", "morden", "kovan", "olympic", "classic", "dev", "expanse", "musicoin" or a filename.
#[rpc(name = "parity_setChain")]
fn set_spec_name(&self, String) -> Result<bool>;