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// Copyright (C) Moondance Labs Ltd.
// This file is part of Tanssi.
// Tanssi is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// Tanssi is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with Tanssi. If not, see <http://www.gnu.org/licenses/>
//! Genesis configs presets for the Starlight runtime
#[cfg(not(feature = "std"))]
use sp_std::alloc::format;
use {
crate::{SessionKeys, BABE_GENESIS_EPOCH_CONFIG},
authority_discovery_primitives::AuthorityId as AuthorityDiscoveryId,
babe_primitives::AuthorityId as BabeId,
beefy_primitives::ecdsa_crypto::AuthorityId as BeefyId,
grandpa_primitives::AuthorityId as GrandpaId,
primitives::{vstaging::SchedulerParams, AccountId, AccountPublic, AssignmentId, ValidatorId},
sp_core::{sr25519, Pair, Public},
sp_runtime::traits::IdentifyAccount,
sp_std::vec::Vec,
starlight_runtime_constants::currency::UNITS as STAR,
};
/// Helper function to generate a crypto pair from seed
fn get_from_seed<TPublic: Public>(seed: &str) -> <TPublic::Pair as Pair>::Public {
TPublic::Pair::from_string(&format!("//{}", seed), None)
.expect("static values are valid; qed")
.public()
}
/// Helper function to generate an account ID from seed
fn get_account_id_from_seed<TPublic: Public>(seed: &str) -> AccountId
where
AccountPublic: From<<TPublic::Pair as Pair>::Public>,
{
AccountPublic::from(get_from_seed::<TPublic>(seed)).into_account()
/// Helper function to generate stash, controller and session key from seed
fn get_authority_keys_from_seed(
seed: &str,
) -> (
AccountId,
BabeId,
GrandpaId,
ValidatorId,
AssignmentId,
AuthorityDiscoveryId,
BeefyId,
) {
let keys = get_authority_keys_from_seed_no_beefy(seed);
(
keys.0,
keys.1,
keys.2,
keys.3,
keys.4,
keys.5,
keys.6,
get_from_seed::<BeefyId>(seed),
)
fn get_authority_keys_from_seed_no_beefy(
get_account_id_from_seed::<sr25519::Public>(&format!("{}//stash", seed)),
get_account_id_from_seed::<sr25519::Public>(seed),
get_from_seed::<BabeId>(seed),
get_from_seed::<GrandpaId>(seed),
get_from_seed::<ValidatorId>(seed),
get_from_seed::<AssignmentId>(seed),
get_from_seed::<AuthorityDiscoveryId>(seed),
fn testnet_accounts() -> Vec<AccountId> {
Vec::from([
get_account_id_from_seed::<sr25519::Public>("Alice"),
get_account_id_from_seed::<sr25519::Public>("Bob"),
get_account_id_from_seed::<sr25519::Public>("Charlie"),
get_account_id_from_seed::<sr25519::Public>("Dave"),
get_account_id_from_seed::<sr25519::Public>("Eve"),
get_account_id_from_seed::<sr25519::Public>("Ferdie"),
get_account_id_from_seed::<sr25519::Public>("Alice//stash"),
get_account_id_from_seed::<sr25519::Public>("Bob//stash"),
get_account_id_from_seed::<sr25519::Public>("Charlie//stash"),
get_account_id_from_seed::<sr25519::Public>("Dave//stash"),
get_account_id_from_seed::<sr25519::Public>("Eve//stash"),
get_account_id_from_seed::<sr25519::Public>("Ferdie//stash"),
])
fn starlight_session_keys(
babe: BabeId,
grandpa: GrandpaId,
para_validator: ValidatorId,
para_assignment: AssignmentId,
authority_discovery: AuthorityDiscoveryId,
beefy: BeefyId,
) -> SessionKeys {
SessionKeys {
babe,
grandpa,
para_validator,
para_assignment,
authority_discovery,
beefy,
fn default_parachains_host_configuration(
) -> runtime_parachains::configuration::HostConfiguration<primitives::BlockNumber> {
use primitives::{
node_features::FeatureIndex, AsyncBackingParams, MAX_CODE_SIZE, MAX_POV_SIZE,
runtime_parachains::configuration::HostConfiguration {
validation_upgrade_cooldown: 2u32,
validation_upgrade_delay: 2,
code_retention_period: 1200,
max_code_size: MAX_CODE_SIZE,
max_pov_size: MAX_POV_SIZE,
max_head_data_size: 32 * 1024,
max_upward_queue_count: 8,
max_upward_queue_size: 1024 * 1024,
max_downward_message_size: 1024 * 1024,
max_upward_message_size: 50 * 1024,
max_upward_message_num_per_candidate: 5,
hrmp_sender_deposit: 0,
hrmp_recipient_deposit: 0,
hrmp_channel_max_capacity: 8,
hrmp_channel_max_total_size: 8 * 1024,
hrmp_max_parachain_inbound_channels: 4,
hrmp_channel_max_message_size: 1024 * 1024,
hrmp_max_parachain_outbound_channels: 4,
hrmp_max_message_num_per_candidate: 5,
dispute_period: 6,
no_show_slots: 2,
n_delay_tranches: 25,
needed_approvals: 2,
relay_vrf_modulo_samples: 2,
zeroth_delay_tranche_width: 0,
minimum_validation_upgrade_delay: 5,
async_backing_params: AsyncBackingParams {
max_candidate_depth: 3,
allowed_ancestry_len: 2,
},
node_features: bitvec::vec::BitVec::from_element(
1u8 << (FeatureIndex::ElasticScalingMVP as usize),
),
scheduler_params: SchedulerParams {
lookahead: 2,
group_rotation_frequency: 20,
paras_availability_period: 4,
..Default::default()
#[test]
fn default_parachains_host_configuration_is_consistent() {
default_parachains_host_configuration().panic_if_not_consistent();
fn starlight_testnet_genesis(
initial_authorities: Vec<(
)>,
root_key: AccountId,
endowed_accounts: Option<Vec<AccountId>>,
) -> serde_json::Value {
let endowed_accounts: Vec<AccountId> = endowed_accounts.unwrap_or_else(testnet_accounts);
const ENDOWMENT: u128 = 1_000_000 * STAR;
serde_json::json!({
"balances": {
"balances": endowed_accounts.iter().map(|k| (k.clone(), ENDOWMENT)).collect::<Vec<_>>(),
"session": {
"keys": initial_authorities
.iter()
.map(|x| {
x.0.clone(),
starlight_session_keys(
x.2.clone(),
x.3.clone(),
x.4.clone(),
x.5.clone(),
x.6.clone(),
x.7.clone(),
})
.collect::<Vec<_>>(),
"babe": {
"epochConfig": Some(BABE_GENESIS_EPOCH_CONFIG),
"sudo": { "key": Some(root_key.clone()) },
"configuration": {
"config": runtime_parachains::configuration::HostConfiguration {
max_validators_per_core: Some(1),
..default_parachains_host_configuration().scheduler_params
..default_parachains_host_configuration()
"registrar": {
"nextFreeParaId": primitives::LOWEST_PUBLIC_ID,
// staging_testnet
fn starlight_staging_testnet_config_genesis() -> serde_json::Value {
use {hex_literal::hex, sp_core::crypto::UncheckedInto};
// subkey inspect "$SECRET"
let endowed_accounts = Vec::from([
// 5DwBmEFPXRESyEam5SsQF1zbWSCn2kCjyLW51hJHXe9vW4xs
hex!["52bc71c1eca5353749542dfdf0af97bf764f9c2f44e860cd485f1cd86400f649"].into(),
]);
// ./scripts/prepare-test-net.sh 8
let initial_authorities: Vec<(
)> = Vec::from([
//5EHZkbp22djdbuMFH9qt1DVzSCvqi3zWpj6DAYfANa828oei
hex!["62475fe5406a7cb6a64c51d0af9d3ab5c2151bcae982fb812f7a76b706914d6a"].into(),
//5FeSEpi9UYYaWwXXb3tV88qtZkmSdB3mvgj3pXkxKyYLGhcd
hex!["9e6e781a76810fe93187af44c79272c290c2b9e2b8b92ee11466cd79d8023f50"].into(),
//5Fh6rDpMDhM363o1Z3Y9twtaCPfizGQWCi55BSykTQjGbP7H
hex!["a076ef1280d768051f21d060623da3ab5b56944d681d303ed2d4bf658c5bed35"]
.unchecked_into(),
//5CPd3zoV9Aaah4xWucuDivMHJ2nEEmpdi864nPTiyRZp4t87
hex!["0e6d7d1afbcc6547b92995a394ba0daed07a2420be08220a5a1336c6731f0bfa"]
//5CP6oGfwqbEfML8efqm1tCZsUgRsJztp9L8ZkEUxA16W8PPz
hex!["0e07a51d3213842f8e9363ce8e444255990a225f87e80a3d651db7841e1a0205"]
//5HQdwiDh8Qtd5dSNWajNYpwDvoyNWWA16Y43aEkCNactFc2b
hex!["ec60e71fe4a567ef9fef99d4bbf37ffae70564b41aa6f94ef0317c13e0a5477b"]
//5HbSgM72xVuscsopsdeG3sCSCYdAeM1Tay9p79N6ky6vwDGq
hex!["f49eae66a0ac9f610316906ec8f1a0928e20d7059d76a5ca53cbcb5a9b50dd3c"]
//5DPSWdgw38Spu315r6LSvYCggeeieBAJtP5A1qzuzKhqmjVu
hex!["034f68c5661a41930c82f26a662276bf89f33467e1c850f2fb8ef687fe43d62276"]
//5DvH8oEjQPYhzCoQVo7WDU91qmQfLZvxe9wJcrojmJKebCmG
hex!["520b48452969f6ddf263b664de0adb0c729d0e0ad3b0e5f3cb636c541bc9022a"].into(),
//5ENZvCRzyXJJYup8bM6yEzb2kQHEb1NDpY2ZEyVGBkCfRdj3
hex!["6618289af7ae8621981ffab34591e7a6486e12745dfa3fd3b0f7e6a3994c7b5b"].into(),
//5DLjSUfqZVNAADbwYLgRvHvdzXypiV1DAEaDMjcESKTcqMoM
hex!["38757d0de00a0c739e7d7984ef4bc01161bd61e198b7c01b618425c16bb5bd5f"]
//5HnDVBN9mD6mXyx8oryhDbJtezwNSj1VRXgLoYCBA6uEkiao
hex!["fcd5f87a6fd5707a25122a01b4dac0a8482259df7d42a9a096606df1320df08d"]
//5EPEWRecy2ApL5n18n3aHyU1956zXTRqaJpzDa9DoqiggNwF
hex!["669a10892119453e9feb4e3f1ee8e028916cc3240022920ad643846fbdbee816"]
//5ES3fw5X4bndSgLNmtPfSbM2J1kLqApVB2CCLS4CBpM1UxUZ
hex!["68bf52c482630a8d1511f2edd14f34127a7d7082219cccf7fd4c6ecdb535f80d"]
//5HeXbwb5PxtcRoopPZTp5CQun38atn2UudQ8p2AxR5BzoaXw
hex!["f6f8fe475130d21165446a02fb1dbce3a7bf36412e5d98f4f0473aed9252f349"]
//5F7nTtN8MyJV4UsXpjg7tHSnfANXZ5KRPJmkASc1ZSH2Xoa5
hex!["03a90c2bb6d3b7000020f6152fe2e5002fa970fd1f42aafb6c8edda8dacc2ea77e"]
//5FPMzsezo1PRxYbVpJMWK7HNbR2kUxidsAAxH4BosHa4wd6S
hex!["92ef83665b39d7a565e11bf8d18d41d45a8011601c339e57a8ea88c8ff7bba6f"].into(),
//5G6NQidFG7YiXsvV7hQTLGArir9tsYqD4JDxByhgxKvSKwRx
hex!["b235f57244230589523271c27b8a490922ffd7dccc83b044feaf22273c1dc735"].into(),
//5GpZhzAVg7SAtzLvaAC777pjquPEcNy1FbNUAG2nZvhmd6eY
hex!["d2644c1ab2c63a3ad8d40ad70d4b260969e3abfe6d7e6665f50dc9f6365c9d2a"]
//5HAes2RQYPbYKbLBfKb88f4zoXv6pPA6Ke8CjN7dob3GpmSP
hex!["e1b68fbd84333e31486c08e6153d9a1415b2e7e71b413702b7d64e9b631184a1"]
//5FtAGDZYJKXkhVhAxCQrXmaP7EE2mGbBMfmKDHjfYDgq2BiU
hex!["a8e61ffacafaf546283dc92d14d7cc70ea0151a5dd81fdf73ff5a2951f2b6037"]
//5CtK7JHv3h6UQZ44y54skxdwSVBRtuxwPE1FYm7UZVhg8rJV
hex!["244f3421b310c68646e99cdbf4963e02067601f57756b072a4b19431448c186e"]
//5D4r6YaB6F7A7nvMRHNFNF6zrR9g39bqDJFenrcaFmTCRwfa
hex!["2c57f81fd311c1ab53813c6817fe67f8947f8d39258252663b3384ab4195494d"]
//5EPoHj8uV4fFKQHYThc6Z9fDkU7B6ih2ncVzQuDdNFb8UyhF
hex!["039d065fe4f9234f0a4f13cc3ae585f2691e9c25afa469618abb6645111f607a53"]
//5DMNx7RoX6d7JQ38NEM7DWRcW2THu92LBYZEWvBRhJeqcWgR
hex!["38f3c2f38f6d47f161e98c697bbe3ca0e47c033460afda0dda314ab4222a0404"].into(),
//5GGdKNDr9P47dpVnmtq3m8Tvowwf1ot1abw6tPsTYYFoKm2v
hex!["ba0898c1964196474c0be08d364cdf4e9e1d47088287f5235f70b0590dfe1704"].into(),
//5EjkyPCzR2SjhDZq8f7ufsw6TfkvgNRepjCRQFc4TcdXdaB1
hex!["764186bc30fd5a02477f19948dc723d6d57ab174debd4f80ed6038ec960bfe21"]
//5DJV3zCBTJBLGNDCcdWrYxWDacSz84goGTa4pFeKVvehEBte
hex!["36be9069cdb4a8a07ecd51f257875150f0a8a1be44a10d9d98dabf10a030aef4"]
//5F9FsRjpecP9GonktmtFL3kjqNAMKjHVFjyjRdTPa4hbQRZA
hex!["882d72965e642677583b333b2d173ac94b5fd6c405c76184bb14293be748a13b"]
//5F1FZWZSj3JyTLs8sRBxU6QWyGLSL9BMRtmSKDmVEoiKFxSP
hex!["821271c99c958b9220f1771d9f5e29af969edfa865631dba31e1ab7bc0582b75"]
//5CtgRR74VypK4h154s369abs78hDUxZSJqcbWsfXvsjcHJNA
hex!["2496f28d887d84705c6dae98aee8bf90fc5ad10bb5545eca1de6b68425b70f7c"]
//5CPx6dsr11SCJHKFkcAQ9jpparS7FwXQBrrMznRo4Hqv1PXz
hex!["0307d29bbf6a5c4061c2157b44fda33b7bb4ec52a5a0305668c74688cedf288d58"]
//5C8AL1Zb4bVazgT3EgDxFgcow1L4SJjVu44XcLC9CrYqFN4N
hex!["02a2d8cfcf75dda85fafc04ace3bcb73160034ed1964c43098fb1fe831de1b16"].into(),
//5FLYy3YKsAnooqE4hCudttAsoGKbVG3hYYBtVzwMjJQrevPa
hex!["90cab33f0bb501727faa8319f0845faef7d31008f178b65054b6629fe531b772"].into(),
//5Et3tfbVf1ByFThNAuUq5pBssdaPPskip5yob5GNyUFojXC7
hex!["7c94715e5dd8ab54221b1b6b2bfa5666f593f28a92a18e28052531de1bd80813"]
//5EX1JBghGbQqWohTPU6msR9qZ2nYPhK9r3RTQ2oD1K8TCxaG
hex!["6c878e33b83c20324238d22240f735457b6fba544b383e70bb62a27b57380c81"]
//5EUNaBpX9mJgcmLQHyG5Pkms6tbDiKuLbeTEJS924Js9cA1N
hex!["6a8570b9c6408e54bacf123cc2bb1b0f087f9c149147d0005badba63a5a4ac01"]
//5CaZuueRVpMATZG4hkcrgDoF4WGixuz7zu83jeBdY3bgWGaG
hex!["16c69ea8d595e80b6736f44be1eaeeef2ac9c04a803cc4fd944364cb0d617a33"]
//5DABsdQCDUGuhzVGWe5xXzYQ9rtrVxRygW7RXf9Tsjsw1aGJ
hex!["306ac5c772fe858942f92b6e28bd82fb7dd8cdd25f9a4626c1b0eee075fcb531"]
//5H91T5mHhoCw9JJG4NjghDdQyhC6L7XcSuBWKD3q3TAhEVvQ
hex!["02fb0330356e63a35dd930bc74525edf28b3bf5eb44aab9e9e4962c8309aaba6a6"]
//5C8XbDXdMNKJrZSrQURwVCxdNdk8AzG6xgLggbzuA399bBBF
hex!["02ea6bfa8b23b92fe4b5db1063a1f9475e3acd0ab61e6b4f454ed6ba00b5f864"].into(),
//5GsyzFP8qtF8tXPSsjhjxAeU1v7D1PZofuQKN9TdCc7Dp1JM
hex!["d4ffc4c05b47d1115ad200f7f86e307b20b46c50e1b72a912ec4f6f7db46b616"].into(),
//5GHWB8ZDzegLcMW7Gdd1BS6WHVwDdStfkkE4G7KjPjZNJBtD
hex!["bab3cccdcc34401e9b3971b96a662686cf755aa869a5c4b762199ce531b12c5b"]
//5GzDPGbUM9uH52ZEwydasTj8edokGUJ7vEpoFWp9FE1YNuFB
hex!["d9c056c98ca0e6b4eb7f5c58c007c1db7be0fe1f3776108f797dd4990d1ccc33"]
//5CmLCFeSurRXXtwMmLcVo7sdJ9EqDguvJbuCYDcHkr3cpqyE
hex!["1efc23c0b51ad609ab670ecf45807e31acbd8e7e5cb7c07cf49ee42992d2867c"]
//5DnsSy8a8pfE2aFjKBDtKw7WM1V4nfE5sLzP15MNTka53GqS
hex!["4c64d3f06d28adeb36a892fdaccecace150bec891f04694448a60b74fa469c22"]
//5CZdFnyzZvKetZTeUwj5APAYskVJe4QFiTezo5dQNsrnehGd
hex!["160ea09c5717270e958a3da42673fa011613a9539b2e4ebcad8626bc117ca04a"]
//5HgoR9JJkdBusxKrrs3zgd3ToppgNoGj1rDyAJp4e7eZiYyT
hex!["020019a8bb188f8145d02fa855e9c36e9914457d37c500e03634b5223aa5702474"]
//5HinEonzr8MywkqedcpsmwpxKje2jqr9miEwuzyFXEBCvVXM
hex!["fa373e25a1c4fe19c7148acde13bc3db1811cf656dc086820f3dda736b9c4a00"].into(),
//5EHJbj6Td6ks5HDnyfN4ttTSi57osxcQsQexm7XpazdeqtV7
hex!["62145d721967bd88622d08625f0f5681463c0f1b8bcd97eb3c2c53f7660fd513"].into(),
//5EeCsC58XgJ1DFaoYA1WktEpP27jvwGpKdxPMFjicpLeYu96
hex!["720537e2c1c554654d73b3889c3ef4c3c2f95a65dd3f7c185ebe4afebed78372"]
//5DnEySxbnppWEyN8cCLqvGjAorGdLRg2VmkY96dbJ1LHFK8N
hex!["4bea0b37e0cce9bddd80835fa2bfd5606f5dcfb8388bbb10b10c483f0856cf14"]
//5CAC278tFCHAeHYqE51FTWYxHmeLcENSS1RG77EFRTvPZMJT
hex!["042f07fc5268f13c026bbe199d63e6ac77a0c2a780f71cda05cee5a6f1b3f11f"]
//5HjRTLWcQjZzN3JDvaj1UzjNSayg5ZD9ZGWMstaL7Ab2jjAa
hex!["fab485e87ed1537d089df521edf983a777c57065a702d7ed2b6a2926f31da74f"]
//5ELv74v7QcsS6FdzvG4vL2NnYDGWmRnJUSMKYwdyJD7Xcdi7
hex!["64d59feddb3d00316a55906953fb3db8985797472bd2e6c7ea1ab730cc339d7f"]
//5FaUcPt4fPz93vBhcrCJqmDkjYZ7jCbzAF56QJoCmvPaKrmx
hex!["033f1a6d47fe86f88934e4b83b9fae903b92b5dcf4fec97d5e3e8bf4f39df03685"]
//5Ey3NQ3dfabaDc16NUv7wRLsFCMDFJSqZFzKVycAsWuUC6Di
hex!["8062e9c21f1d92926103119f7e8153cebdb1e5ab3e52d6f395be80bb193eab47"].into(),
//5HiWsuSBqt8nS9pnggexXuHageUifVPKPHDE2arTKqhTp1dV
hex!["fa0388fa88f3f0cb43d583e2571fbc0edad57dff3a6fd89775451dd2c2b8ea00"].into(),
//5H168nKX2Yrfo3bxj7rkcg25326Uv3CCCnKUGK6uHdKMdPt8
hex!["da6b2df18f0f9001a6dcf1d301b92534fe9b1f3ccfa10c49449fee93adaa8349"]
//5DrA2fZdzmNqT5j6DXNwVxPBjDV9jhkAqvjt6Us3bQHKy3cF
hex!["4ee66173993dd0db5d628c4c9cb61a27b76611ad3c3925947f0d0011ee2c5dcc"]
//5Gx6YeNhynqn8qkda9QKpc9S7oDr4sBrfAu516d3sPpEt26F
hex!["d822d4088b20dca29a580a577a97d6f024bb24c9550bebdfd7d2d18e946a1c7d"]
//5DhDcHqwxoes5s89AyudGMjtZXx1nEgrk5P45X88oSTR3iyx
hex!["481538f8c2c011a76d7d57db11c2789a5e83b0f9680dc6d26211d2f9c021ae4c"]
//5DqAvikdpfRdk5rR35ZobZhqaC5bJXZcEuvzGtexAZP1hU3T
hex!["4e262811acdfe94528bfc3c65036080426a0e1301b9ada8d687a70ffcae99c26"]
//5E41Znrr2YtZu8bZp3nvRuLVHg3jFksfQ3tXuviLku4wsao7
hex!["025e84e95ed043e387ddb8668176b42f8e2773ddd84f7f58a6d9bf436a4b527986"]
const STASH: u128 = 100 * STAR;
"balances": endowed_accounts
.map(|k: &AccountId| (k.clone(), ENDOWMENT))
.chain(initial_authorities.iter().map(|x| (x.0.clone(), STASH)))
.into_iter()
x.0,
x.2,
x.3,
x.4,
x.5,
x.6,
x.7,
"sudo": { "key": Some(endowed_accounts[0].clone()) },
"config": default_parachains_host_configuration(),
//development
fn starlight_development_config_genesis() -> serde_json::Value {
starlight_testnet_genesis(
Vec::from([get_authority_keys_from_seed("Alice")]),
None,
//local_testnet
fn starlight_local_testnet_genesis() -> serde_json::Value {
get_authority_keys_from_seed("Alice"),
get_authority_keys_from_seed("Bob"),
]),
/// `Versi` is a temporary testnet that uses the same runtime as starlight.
// versi_local_testnet
fn versi_local_testnet_genesis() -> serde_json::Value {
get_authority_keys_from_seed("Charlie"),
get_authority_keys_from_seed("Dave"),
/// Wococo is a temporary testnet that uses almost the same runtime as starlight.
//wococo_local_testnet
fn wococo_local_testnet_genesis() -> serde_json::Value {
/// Provides the JSON representation of predefined genesis config for given `id`.
pub fn get_preset(id: &sp_genesis_builder::PresetId) -> Option<sp_std::vec::Vec<u8>> {
let patch = match id.try_into() {
Ok("local_testnet") => starlight_local_testnet_genesis(),
Ok("development") => starlight_development_config_genesis(),
Ok("staging_testnet") => starlight_staging_testnet_config_genesis(),
Ok("wococo_local_testnet") => wococo_local_testnet_genesis(),
Ok("versi_local_testnet") => versi_local_testnet_genesis(),
_ => return None,
Some(
serde_json::to_string(&patch)
.expect("serialization to json is expected to work. qed.")
.into_bytes(),