`GenesisBuilder` runtime API #14131

michalkucharczyk · 2023-05-12T13:49:47Z

Proposal of new Runtime API: GenesisBuilder.

It allows to:

create a default GenesisConfig and serialize it to a JSON blob,
deserialize the GenesisConfig from a given JSON blob, and put it into storage, (no defaults allowed)

Step towards: paritytech/polkadot-sdk#25

Required by : #14310

client/genesis-builder/src/lib.rs

Polkadot-Forum · 2023-05-17T14:23:00Z

This pull request has been mentioned on Polkadot Forum. There might be relevant details there:

https://forum.polkadot.network/t/genesisconfig-in-wasm-runtime-a-step-towards-a-non-native-future/2887/1

bkchr

For the naming I don't see any reason to always include genesis_config as this is already implied by GenesisBuilder.

Looking good so far I would say.

bkchr · 2023-05-20T22:51:35Z

primitives/genesis-builder/src/lib.rs

+		fn default_genesis_config_as_json() -> sp_std::vec::Vec<u8>;
+
+		/// Deserialize the `GenesisConfig` from given json blob and put it into the storage.
+		fn build_genesis_config_from_json(json: sp_std::vec::Vec<u8>);


Suggested change

fn build_genesis_config_from_json(json: sp_std::vec::Vec<u8>);

fn build_from_json(json: sp_std::vec::Vec<u8>);

bkchr · 2023-05-20T22:54:37Z

primitives/genesis-builder/src/lib.rs

+	/// API to interact with GenesisConfig for the runtime
+	pub trait GenesisBuilder {
+		/// Instantiate default `GenesisConfig` and serializes it to json blob.
+		fn default_genesis_config_as_json() -> sp_std::vec::Vec<u8>;


Suggested change

fn default_genesis_config_as_json() -> sp_std::vec::Vec<u8>;

fn generate_as_json(name: sp_runtime::RuntimeString) -> sp_std::vec::Vec<u8>;

Naming is still not really good, but yeah... We also need to supply some kind of name or whatever we want to call it to distinguish which genesis config we want to generate. Here we also have different kind of genesis configs: https://github.com/paritytech/substrate/tree/2c3b923423fac829b02842fbb9a0016b55c417df/bin/node/cli/src/chain_spec.rs

Maybe I am missing something, but I don't see the need for extra parameter to construct default GenesisConfig. GenesisConfig of the runtime is just a struct containing all GenesisConfigs pallets, so all required parametrization is already self-contained in config (AFAIU it).

e.g. the generated GenesisConfig for kitchensink-runtime:

pub struct GenesisConfig { pub system: SystemConfig, pub babe: BabeConfig, pub indices: IndicesConfig, pub balances: BalancesConfig, pub transaction_payment: TransactionPaymentConfig, pub staking: StakingConfig, pub session: SessionConfig, pub democracy: DemocracyConfig, pub council: CouncilConfig, pub technical_committee: TechnicalCommitteeConfig, pub elections: ElectionsConfig, pub technical_membership: TechnicalMembershipConfig, pub grandpa: GrandpaConfig, pub treasury: TreasuryConfig, pub sudo: SudoConfig, pub im_online: ImOnlineConfig, pub authority_discovery: AuthorityDiscoveryConfig, pub society: SocietyConfig, pub vesting: VestingConfig, pub assets: AssetsConfig, pub transaction_storage: TransactionStorageConfig, pub alliance_motion: AllianceMotionConfig, pub alliance: AllianceConfig, pub nomination_pools: NominationPoolsConfig, }

What I see in chain_spec.rs are different ChainSpecs: development_config, local_testnet_config.

Each of them has specific genesis: local_testnet_genesis, development_config_genesis. Those specific gensis are just differently parametrized GenesisConfig instances of kitchensink_runtime created in shared function testnet_genesis.

With new GenesisBuilder API approach, that custom GenesisConfig will be embedded in the form of pre-configured json files customized on top of the json for default GensisConfig.

If I missed something, would you please be more precise on where the extra parameter is actually required?

With new GenesisBuilder API approach, that custom GenesisConfig will be embedded in the form of pre-configured json files customized on top of the json for default GensisConfig.

Could you give an example of this?

Examples for test-runtime.

What I mean by default GenesisConfig:

substrate/test-utils/runtime/src/lib.rs

Line 1340 in e147d24

let expected = r#"{"system":{"code":"0x"},"babe":{"authorities":[],"epochConfig":null},"substrateTest":{"authorities":[]},"balances":{"balances":[]}}"#;

What I mean by GenesisConfig customised on top of default:

substrate/test-utils/runtime/src/test_json/default_genesis_config.json

Line 1 in e147d24

{"system":{"code":"0x52"},"babe":{"authorities":[["5GrwvaEF5zXb26Fz9rcQpDWS57CtERHpNehXCPcNoHGKutQY",1],["5FHneW46xGXgs5mUiveU4sbTyGBzmstUspZC92UhjJM694ty",1],["5FLSigC9HGRKVhB9FiEo4Y3koPsNmBmLJbpXg2mp1hXcS59Y",1]],"epochConfig":{"c":[3,10],"allowed_slots":"PrimaryAndSecondaryPlainSlots"}},"substrateTest":{"authorities":["5GrwvaEF5zXb26Fz9rcQpDWS57CtERHpNehXCPcNoHGKutQY","5FHneW46xGXgs5mUiveU4sbTyGBzmstUspZC92UhjJM694ty","5FLSigC9HGRKVhB9FiEo4Y3koPsNmBmLJbpXg2mp1hXcS59Y"]},"balances":{"balances":[["5D34dL5prEUaGNQtPPZ3yN5Y6BnkfXunKXXz6fo7ZJbLwRRH",100000000000000000],["5GBNeWRhZc2jXu7D55rBimKYDk8PGk8itRYFTPfC8RJLKG5o",100000000000000000],["5Dfis6XL8J2P6JHUnUtArnFWndn62SydeP8ee8sG2ky9nfm9",100000000000000000],["5F4H97f7nQovyrbiq4ZetaaviNwThSVcFobcA5aGab6167dK",100000000000000000],["5DiDShBWa1fQx6gLzpf3SFBhMinCoyvHM1BWjPNsmXS8hkrW",100000000000000000],["5EFb84yH9tpcFuiKUcsmdoF7xeeY3ajG1ZLQimxQoFt9HMKR",100000000000000000],["5DZLHESsfGrJ5YzT3HuRPXsSNb589xQ4Unubh1mYLodzKdVY",100000000000000000],["5GHJzqvG6tXnngCpG7B12qjUvbo5e4e9z8Xjidk3CQZHxTPZ",100000000000000000],["5CUnSsgAyLND3bxxnfNhgWXSe9Wn676JzLpGLgyJv858qhoX",100000000000000000],["5CVKn7HAZW1Ky4r7Vkgsr7VEW88C2sHgUNDiwHY9Ct2hjU8q",100000000000000000],["5H673aukQ4PeDe1U2nuv1bi32xDEziimh3PZz7hDdYUB7TNz",100000000000000000],["5HTe9L15LJryjUAt1jZXZCBPnzbbGnpvFwbjE3NwCWaAqovf",100000000000000000],["5D7LFzGpMwHPyDBavkRbWSKWTtJhCaPPZ379wWLT23bJwXJz",100000000000000000],["5CLepMARnEgtVR1EkUuJVUvKh97gzergpSxUU3yKGx1v6EwC",100000000000000000],["5Chb2UhfvZpmjjEziHbFbotM4quX32ZscRV6QJBt1rUKzz51",100000000000000000],["5HmRp3i3ZZk7xsAvbi8hyXVP6whSMnBJGebVC4FsiZVhx52e",100000000000000000],["5GrwvaEF5zXb26Fz9rcQpDWS57CtERHpNehXCPcNoHGKutQY",100000000000000000],["5FHneW46xGXgs5mUiveU4sbTyGBzmstUspZC92UhjJM694ty",100000000000000000],["5FLSigC9HGRKVhB9FiEo4Y3koPsNmBmLJbpXg2mp1hXcS59Y",100000000000000000]]}}

Since we won't have GenesisConfig on the native side of the node (at least this is my current understanding), we will not be able to hard-code the GenesisConfig in the form of rust variable. The alternative for this will be json string.

substrate/bin/node/cli/src/chain_spec.rs

Lines 297 to 379 in 9d0200b

GenesisConfig {

system: SystemConfig { code: wasm_binary_unwrap().to_vec() },

balances: BalancesConfig {

balances: endowed_accounts.iter().cloned().map(|x| (x, ENDOWMENT)).collect(),

},

indices: IndicesConfig { indices: vec![] },

session: SessionConfig {

keys: initial_authorities

.iter()

.map(|x| {

(

x.0.clone(),

x.0.clone(),

session_keys(x.2.clone(), x.3.clone(), x.4.clone(), x.5.clone()),

)

})

.collect::<Vec<_>>(),

},

staking: StakingConfig {

validator_count: initial_authorities.len() as u32,

minimum_validator_count: initial_authorities.len() as u32,

invulnerables: initial_authorities.iter().map(|x| x.0.clone()).collect(),

slash_reward_fraction: Perbill::from_percent(10),

stakers,

..Default::default()

},

democracy: DemocracyConfig::default(),

elections: ElectionsConfig {

members: endowed_accounts

.iter()

.take((num_endowed_accounts + 1) / 2)

.cloned()

.map(|member| (member, STASH))

.collect(),

},

council: CouncilConfig::default(),

technical_committee: TechnicalCommitteeConfig {

members: endowed_accounts

.iter()

.take((num_endowed_accounts + 1) / 2)

.cloned()

.collect(),

phantom: Default::default(),

},

sudo: SudoConfig { key: Some(root_key) },

babe: BabeConfig {

authorities: vec![],

epoch_config: Some(kitchensink_runtime::BABE_GENESIS_EPOCH_CONFIG),

},

im_online: ImOnlineConfig { keys: vec![] },

authority_discovery: AuthorityDiscoveryConfig { keys: vec![] },

grandpa: GrandpaConfig { authorities: vec![] },

technical_membership: Default::default(),

treasury: Default::default(),

society: SocietyConfig {

members: endowed_accounts

.iter()

.take((num_endowed_accounts + 1) / 2)

.cloned()

.collect(),

pot: 0,

max_members: 999,

},

vesting: Default::default(),

assets: pallet_assets::GenesisConfig {

// This asset is used by the NIS pallet as counterpart currency.

assets: vec![(9, get_account_id_from_seed::<sr25519::Public>("Alice"), true, 1)],

..Default::default()

},

transaction_storage: Default::default(),

transaction_payment: Default::default(),

alliance: Default::default(),

alliance_motion: Default::default(),

nomination_pools: NominationPoolsConfig {

min_create_bond: 10 * DOLLARS,

min_join_bond: 1 * DOLLARS,

..Default::default()

},

glutton: GluttonConfig {

compute: Default::default(),

storage: Default::default(),

trash_data_count: Default::default(),

},

This is the stuff I'm "worried" about.

But I think we should be able to solve this with some tricks. However this would require to write there some json code, but I think this is doable.

I imagine something like this:

let config = json! {{ "session": { "keys": initial_authorities.map().collect(), }, "staking": { "validator_count": validator_count, }, }}; // It should be able to handle that we only pass parts of the config and the rest should be filled by the default values. Runtime::build_from_json(config);

BTW this json macro already exists: https://docs.rs/serde_json/latest/serde_json/macro.json.html

Added in: 679a970

We would not need to put this functionality into the runtime, we can easily implement it outside the runtime, using functions already defined:

let json_str = Runtime::default_as_json(); let mut json: Value = serde_json::from_str(json_str).unwrap(); merge(&mut json, json!({ "session": { "keys": initial_authorities.map().collect(), }, "staking": { "validator_count": validator_count, }, }); Runtime::build_from_json(json.to_string());

However I do understand that build_with_patch is a nice convenient function.

…-api-proposal

primitives/genesis-builder/Cargo.toml

primitives/genesis-builder/src/lib.rs

Co-authored-by: Davide Galassi <davxy@datawok.net>

michalkucharczyk · 2023-06-08T06:36:35Z

I’ve just realized that we don’t need two functions: build_from_json, build_with_patch. Building from full config is just a special case of patching.

skunert

Looks nice!

bkchr

Looks good % nits

primitives/genesis-builder/src/lib.rs

michalkucharczyk · 2023-06-21T13:22:55Z

bot rebase

…-api-proposal

paritytech-processbot · 2023-06-21T13:23:04Z

Rebased

bkchr

I think the current function naming is confusing.

If we think about what we need, then we need to get the default config as json. We need to be able to patch the default config to create configs for dev networks etc. Lastly, we need to be able to build the config. Maybe using here build is a too confusing term, not sure, but given the internals it makes sense.

With these three functions we should be able to implement all possibles functionality as it exists right now.

(docs then also require updating)

bkchr · 2023-06-21T17:45:44Z

primitives/genesis-builder/src/lib.rs

+		///
+		/// This function instantiates the default `GenesisConfig` struct for the runtime and serializes it into a JSON
+		/// blob. It returns a `Vec<u8>` containing the JSON representation of the default `GenesisConfig`.
+		fn get_default_as_json() -> sp_std::vec::Vec<u8>;


Suggested change

fn get_default_as_json() -> sp_std::vec::Vec<u8>;

fn create_default_config() -> sp_std::vec::Vec<u8>;

bkchr · 2023-06-21T17:46:16Z

primitives/genesis-builder/src/lib.rs

+		///    `GenesisConfig`. This is helpful for changing enum variant value.
+		///
+		/// Please note that the patch may contain full `GenesisConfig`.
+		fn build_config(patch: sp_std::vec::Vec<u8>) -> Result;


Suggested change

fn build_config(patch: sp_std::vec::Vec<u8>) -> Result;

fn patch_default_config(patch: sp_std::vec::Vec<u8>) -> sp_std::result::Result<sp_std::vec::Vec<u8>, RuntimeString>;

bkchr · 2023-06-21T17:46:30Z

primitives/genesis-builder/src/lib.rs

+		/// It is recommended to log any errors encountered during the process.
+		///
+		/// Please note that provided json blob must contain all `GenesisConfig` fields, no defaults will be used.
+		fn build_config_no_defaults(json: sp_std::vec::Vec<u8>) -> Result;


Suggested change

fn build_config_no_defaults(json: sp_std::vec::Vec<u8>) -> Result;

fn build_config(json: sp_std::vec::Vec<u8>) -> Result;

michalkucharczyk · 2023-06-21T19:22:31Z

I think the current function naming is confusing.

If we think about what we need, then we need to get the default config as json. We need to be able to patch the default config to create configs for dev networks etc. Lastly, we need to be able to build the config. Maybe using here build is a too confusing term, not sure, but given the internals it makes sense.

With these three functions we should be able to implement all possibles functionality as it exists right now.

(docs then also require updating)

Please note that we don’t need runtime call to merge jsons. Can be done on client side.

build_config(patch) was meant to be convenient function which patches and builds in single call.

If you want stand alone patching then I propose to remove it from runtime and left only build_config (w/o patching).

@bkchr wdyt?

bkchr · 2023-06-21T19:26:43Z

Please note that we don’t need runtime call to merge jsons. Can be done on client side.

Very good point! :D

If you want stand alone patching then I propose to remove it from runtime and left only build_config (w/o patching).

Sounds good.

michalkucharczyk · 2023-06-26T11:56:08Z

bot merge

* GenesisConfigBuilder: preliminary API proposal * fmt * comment removed * build_default_config removed * Update client/genesis-builder/src/lib.rs * config -> gensis_config * GenesisConfigBuilder: helper added * moved to primitives * licesne changed to apache-2.0 * Cargo.toml: name/path to genesis-builder updated * helper removed * sp-sd version bumped * sp-std bump * naming + new function * fix * build_from_patch_json -> build_with_patch * fix * Cargo.lock updated * readme: license updated * Update primitives/genesis-builder/src/lib.rs Co-authored-by: Davide Galassi <davxy@datawok.net> * Update primitives/genesis-builder/src/lib.rs Co-authored-by: Davide Galassi <davxy@datawok.net> * Update primitives/genesis-builder/Cargo.toml Co-authored-by: Davide Galassi <davxy@datawok.net> * Cargo.lock updated * removed redundant function * GenesisConfigBuilder API: no_defaults function added * Cargo.lock updated * GenesisConfigBuilder API: patching fn removed * trigger CI job --------- Co-authored-by: parity-processbot <> Co-authored-by: Davide Galassi <davxy@datawok.net>

GenesisConfigBuilder: preliminary API proposal

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michalkucharczyk mentioned this pull request May 12, 2023

GenesisConfig in a native runtime free world paritytech/polkadot-sdk#25

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michalkucharczyk changed the title ~~GenesisConfigBuilder Runtime API: preliminary proposal~~ GenesisBuilder Runtime API: preliminary proposal May 12, 2023

michalkucharczyk added 2 commits May 12, 2023 15:51

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config -> gensis_config

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moved to primitives

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`GenesisBuilder` runtime API #14131

`GenesisBuilder` runtime API #14131

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	fn build_genesis_config_from_json(json: sp_std::vec::Vec<u8>);
	fn build_from_json(json: sp_std::vec::Vec<u8>);

	fn default_genesis_config_as_json() -> sp_std::vec::Vec<u8>;
	fn generate_as_json(name: sp_runtime::RuntimeString) -> sp_std::vec::Vec<u8>;

	GenesisConfig {
	system: SystemConfig { code: wasm_binary_unwrap().to_vec() },
	balances: BalancesConfig {
	balances: endowed_accounts.iter().cloned().map(\|x\| (x, ENDOWMENT)).collect(),
	},
	indices: IndicesConfig { indices: vec![] },
	session: SessionConfig {
	keys: initial_authorities
	.iter()
	.map(\|x\| {
	(
	x.0.clone(),
	x.0.clone(),
	session_keys(x.2.clone(), x.3.clone(), x.4.clone(), x.5.clone()),
	)
	})
	.collect::<Vec<_>>(),
	},
	staking: StakingConfig {
	validator_count: initial_authorities.len() as u32,
	minimum_validator_count: initial_authorities.len() as u32,
	invulnerables: initial_authorities.iter().map(\|x\| x.0.clone()).collect(),
	slash_reward_fraction: Perbill::from_percent(10),
	stakers,
	..Default::default()
	},
	democracy: DemocracyConfig::default(),
	elections: ElectionsConfig {
	members: endowed_accounts
	.iter()
	.take((num_endowed_accounts + 1) / 2)
	.cloned()
	.map(\|member\| (member, STASH))
	.collect(),
	},
	council: CouncilConfig::default(),
	technical_committee: TechnicalCommitteeConfig {
	members: endowed_accounts
	.iter()
	.take((num_endowed_accounts + 1) / 2)
	.cloned()
	.collect(),
	phantom: Default::default(),
	},
	sudo: SudoConfig { key: Some(root_key) },
	babe: BabeConfig {
	authorities: vec![],
	epoch_config: Some(kitchensink_runtime::BABE_GENESIS_EPOCH_CONFIG),
	},
	im_online: ImOnlineConfig { keys: vec![] },
	authority_discovery: AuthorityDiscoveryConfig { keys: vec![] },
	grandpa: GrandpaConfig { authorities: vec![] },
	technical_membership: Default::default(),
	treasury: Default::default(),
	society: SocietyConfig {
	members: endowed_accounts
	.iter()
	.take((num_endowed_accounts + 1) / 2)
	.cloned()
	.collect(),
	pot: 0,
	max_members: 999,
	},
	vesting: Default::default(),
	assets: pallet_assets::GenesisConfig {
	// This asset is used by the NIS pallet as counterpart currency.
	assets: vec![(9, get_account_id_from_seed::<sr25519::Public>("Alice"), true, 1)],
	..Default::default()
	},
	transaction_storage: Default::default(),
	transaction_payment: Default::default(),
	alliance: Default::default(),
	alliance_motion: Default::default(),
	nomination_pools: NominationPoolsConfig {
	min_create_bond: 10 * DOLLARS,
	min_join_bond: 1 * DOLLARS,
	..Default::default()
	},
	glutton: GluttonConfig {
	compute: Default::default(),
	storage: Default::default(),
	trash_data_count: Default::default(),
	},

	fn get_default_as_json() -> sp_std::vec::Vec<u8>;
	fn create_default_config() -> sp_std::vec::Vec<u8>;

	fn build_config(patch: sp_std::vec::Vec<u8>) -> Result;
	fn patch_default_config(patch: sp_std::vec::Vec<u8>) -> sp_std::result::Result<sp_std::vec::Vec<u8>, RuntimeString>;

	fn build_config_no_defaults(json: sp_std::vec::Vec<u8>) -> Result;
	fn build_config(json: sp_std::vec::Vec<u8>) -> Result;

GenesisBuilder runtime API #14131

GenesisBuilder runtime API #14131

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michalkucharczyk commented Jun 21, 2023

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michalkucharczyk commented Jun 26, 2023

`GenesisBuilder` runtime API #14131

`GenesisBuilder` runtime API #14131

michalkucharczyk commented May 12, 2023 •

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