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feat: enable Osaka EIPs via berachain genesis config (BRIP-10) #243

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feat: enable Osaka EIPs via berachain genesis config (BRIP-10) #243

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6b7789d
feat: enable Osaka EIPs via berachain genesis config (BRIP-0010)
claude Apr 16, 2026
bca592f
fix: add prague4_details to display and validate Osaka after latest fork
claude Apr 16, 2026
27f6618
fix: normalize Osaka activation and add unit tests
claude Apr 16, 2026
374334b
Merge branch 'main' into claude/enable-eip-precompiles-NcATK
calbera Apr 17, 2026
fc5e3c0
Merge branch 'main' into claude/enable-eip-precompiles-NcATK
calbera Apr 20, 2026
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289 changes: 285 additions & 4 deletions src/chainspec/mod.rs
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Original file line number Diff line number Diff line change
@@ -1,7 +1,7 @@
//! Berachain chain specification with Ethereum hardforks plus Prague1 minimum base fee

use crate::{
genesis::{BerachainGenesisConfig, Prague3Config, Prague4Config},
genesis::{BerachainGenesisConfig, OsakaConfig, Prague3Config, Prague4Config},
hardforks::{BerachainHardfork, BerachainHardforks},
primitives::{BerachainHeader, header::BlsPublicKey},
};
Expand Down Expand Up @@ -43,6 +43,7 @@ const BEPOLIA_ETH_GENESIS_JSON: &str =

/// Berachain chain specification wrapping Reth's ChainSpec with Berachain hardforks
#[derive(Debug, Clone, Into, Constructor, PartialEq, Eq, Default)]
#[allow(clippy::too_many_arguments)]
pub struct BerachainChainSpec {
/// The underlying Reth chain specification
pub inner: ChainSpec,
Expand All @@ -57,6 +58,8 @@ pub struct BerachainChainSpec {
pub prague3_config: Option<Prague3Config>,
/// Prague4 configuration (if configured)
pub prague4_config: Option<Prague4Config>,
/// Osaka configuration (if configured)
pub osaka_config: Option<OsakaConfig>,
}

impl BerachainChainSpec {
Expand Down Expand Up @@ -342,7 +345,21 @@ impl EthChainSpec for BerachainChainSpec {
String::new()
};

Box::new(format!("{inner_display}{prague1_details}{prague2_details}{prague3_details}"))
let prague4_details = if let Some(prague4_config) = &self.prague4_config {
format!("\nBerachain Prague4 configuration: {{time={}}}", prague4_config.time)
} else {
String::new()
};

let osaka_details = if let Some(osaka_config) = &self.osaka_config {
format!("\nBerachain Osaka configuration: {{time={}}}", osaka_config.time)
} else {
String::new()
};

Box::new(format!(
"{inner_display}{prague1_details}{prague2_details}{prague3_details}{prague4_details}{osaka_details}"
))
}

fn genesis_header(&self) -> &Self::Header {
Expand Down Expand Up @@ -472,6 +489,7 @@ impl BerachainChainSpec {
prague2_minimum_base_fee: 0,
prague3_config: None,
prague4_config: None,
osaka_config: None,
}
}
}
Expand All @@ -489,11 +507,12 @@ impl From<Genesis> for BerachainChainSpec {
return Self::ethereum_fallback(genesis);
}

// Parse Prague1, Prague2, Prague3, and Prague4 configurations if present
// Parse hardfork configurations if present
let prague1_config_opt = berachain_genesis_config.prague1;
let prague2_config_opt = berachain_genesis_config.prague2;
let prague3_config_opt = berachain_genesis_config.prague3;
let prague4_config_opt = berachain_genesis_config.prague4;
let osaka_config_opt = berachain_genesis_config.osaka;

// Both Prague1 and Prague2 are required for Berachain genesis
let (prague1_config, prague2_config) = match (prague1_config_opt, prague2_config_opt) {
Expand Down Expand Up @@ -596,6 +615,39 @@ impl From<Genesis> for BerachainChainSpec {
}
}

// Resolve effective Osaka activation timestamp from either source, rejecting conflicts
let effective_osaka_time = match (osaka_config_opt.as_ref(), genesis.config.osaka_time) {
(Some(berachain_osaka), Some(standard_osaka))
if berachain_osaka.time != standard_osaka =>
{
panic!(
"Conflicting Osaka activation times: berachain.osaka.time={} vs osakaTime={}. Use one or the other.",
berachain_osaka.time, standard_osaka
);
}
(Some(berachain_osaka), _) => Some(berachain_osaka.time),
(None, Some(standard_osaka)) => Some(standard_osaka),
(None, None) => None,
};

// Validate Osaka ordering if configured (must come at or after the latest preceding fork)
if let Some(osaka_time) = effective_osaka_time {
let (predecessor_name, predecessor_time) = if let Some(p4) = prague4_config_opt.as_ref()
{
("Prague4", p4.time)
} else if let Some(p3) = prague3_config_opt.as_ref() {
("Prague3", p3.time)
} else {
("Prague2", prague2_config.time)
};

if osaka_time < predecessor_time {
panic!(
"Osaka hardfork must activate at or after {predecessor_name} hardfork. {predecessor_name} time: {predecessor_time}, Osaka time: {osaka_time}.",
);
}
}

// Berachain networks don't support proof-of-work or non-genesis merge
if let Some(ttd) = genesis.config.terminal_total_difficulty {
if !ttd.is_zero() {
Expand Down Expand Up @@ -685,7 +737,7 @@ impl From<Genesis> for BerachainChainSpec {
));
}

if let Some(osaka_time) = genesis.config.osaka_time {
if let Some(osaka_time) = effective_osaka_time {
hardforks.push((EthereumHardfork::Osaka.boxed(), ForkCondition::Timestamp(osaka_time)));
}

Expand Down Expand Up @@ -773,6 +825,7 @@ impl From<Genesis> for BerachainChainSpec {
prague2_minimum_base_fee,
prague3_config: prague3_config_opt,
prague4_config: prague4_config_opt,
osaka_config: osaka_config_opt,
}
}
}
Expand Down Expand Up @@ -2498,4 +2551,232 @@ mod tests {
"Syncing node should accept ahead node for sync"
);
}

#[test]
fn test_osaka_activation_via_berachain_config() {
let mut genesis = Genesis::default();
genesis.config.cancun_time = Some(0);
genesis.config.prague_time = Some(0);
genesis.config.terminal_total_difficulty = Some(U256::ZERO);
let extra_fields_json = json!({
"berachain": {
"prague1": {
"time": 0,
"baseFeeChangeDenominator": 48,
"minimumBaseFeeWei": 1000000000,
"polDistributorAddress": "0x4200000000000000000000000000000000000042"
},
"prague2": {
"time": 0,
"minimumBaseFeeWei": 0
},
"osaka": {
"time": 5000
}
}
});
genesis.config.extra_fields =
reth::rpc::types::serde_helpers::OtherFields::try_from(extra_fields_json).unwrap();

let chain_spec = BerachainChainSpec::from(genesis);

assert!(!chain_spec.is_osaka_active_at_timestamp(4999));
assert!(chain_spec.is_osaka_active_at_timestamp(5000));
assert!(chain_spec.is_osaka_active_at_timestamp(6000));
assert!(chain_spec.osaka_config.is_some());
assert_eq!(chain_spec.osaka_config.unwrap().time, 5000);
}

#[test]
fn test_osaka_activation_via_standard_genesis_config() {
let mut genesis = Genesis::default();
genesis.config.cancun_time = Some(0);
genesis.config.prague_time = Some(0);
genesis.config.osaka_time = Some(5000);
genesis.config.terminal_total_difficulty = Some(U256::ZERO);
let extra_fields_json = json!({
"berachain": {
"prague1": {
"time": 0,
"baseFeeChangeDenominator": 48,
"minimumBaseFeeWei": 1000000000,
"polDistributorAddress": "0x4200000000000000000000000000000000000042"
},
"prague2": {
"time": 0,
"minimumBaseFeeWei": 0
}
}
});
genesis.config.extra_fields =
reth::rpc::types::serde_helpers::OtherFields::try_from(extra_fields_json).unwrap();

let chain_spec = BerachainChainSpec::from(genesis);

assert!(!chain_spec.is_osaka_active_at_timestamp(4999));
assert!(chain_spec.is_osaka_active_at_timestamp(5000));
}

#[test]
#[should_panic(
expected = "Osaka hardfork must activate at or after Prague2 hardfork. Prague2 time: 3000, Osaka time: 1000."
)]
fn test_panic_on_osaka_before_prague2() {
let mut genesis = Genesis::default();
genesis.config.cancun_time = Some(0);
genesis.config.prague_time = Some(0);
genesis.config.terminal_total_difficulty = Some(U256::ZERO);
let extra_fields_json = json!({
"berachain": {
"prague1": {
"time": 0,
"baseFeeChangeDenominator": 48,
"minimumBaseFeeWei": 1000000000,
"polDistributorAddress": "0x4200000000000000000000000000000000000042"
},
"prague2": {
"time": 3000,
"minimumBaseFeeWei": 0
},
"osaka": {
"time": 1000
}
}
});
genesis.config.extra_fields =
reth::rpc::types::serde_helpers::OtherFields::try_from(extra_fields_json).unwrap();
let _chain_spec = BerachainChainSpec::from(genesis);
}

#[test]
#[should_panic(
expected = "Osaka hardfork must activate at or after Prague4 hardfork. Prague4 time: 4000, Osaka time: 3500."
)]
fn test_panic_on_osaka_before_prague4() {
let mut genesis = Genesis::default();
genesis.config.cancun_time = Some(0);
genesis.config.prague_time = Some(0);
genesis.config.terminal_total_difficulty = Some(U256::ZERO);
let extra_fields_json = json!({
"berachain": {
"prague1": {
"time": 0,
"baseFeeChangeDenominator": 48,
"minimumBaseFeeWei": 1000000000,
"polDistributorAddress": "0x4200000000000000000000000000000000000042"
},
"prague2": {
"time": 1000,
"minimumBaseFeeWei": 0
},
"prague3": {
"time": 2000,
"blockedAddresses": [
"0x1111111111111111111111111111111111111111"
],
"rescueAddress": "0x9999999999999999999999999999999999999999",
"bexVaultAddress": "0xBE0BE0BE0BE0BE0BE0BE0BE0BE0BE0BE0BE0BE0B"
},
"prague4": {
"time": 4000
},
"osaka": {
"time": 3500
}
}
});
genesis.config.extra_fields =
reth::rpc::types::serde_helpers::OtherFields::try_from(extra_fields_json).unwrap();
let _chain_spec = BerachainChainSpec::from(genesis);
}

#[test]
#[should_panic(
expected = "Osaka hardfork must activate at or after Prague2 hardfork. Prague2 time: 3000, Osaka time: 1000."
)]
fn test_panic_on_osaka_before_prague2_via_standard_config() {
let mut genesis = Genesis::default();
genesis.config.cancun_time = Some(0);
genesis.config.prague_time = Some(0);
genesis.config.osaka_time = Some(1000);
genesis.config.terminal_total_difficulty = Some(U256::ZERO);
let extra_fields_json = json!({
"berachain": {
"prague1": {
"time": 0,
"baseFeeChangeDenominator": 48,
"minimumBaseFeeWei": 1000000000,
"polDistributorAddress": "0x4200000000000000000000000000000000000042"
},
"prague2": {
"time": 3000,
"minimumBaseFeeWei": 0
}
}
});
genesis.config.extra_fields =
reth::rpc::types::serde_helpers::OtherFields::try_from(extra_fields_json).unwrap();
let _chain_spec = BerachainChainSpec::from(genesis);
}

#[test]
#[should_panic(expected = "Conflicting Osaka activation times")]
fn test_panic_on_conflicting_osaka_times() {
let mut genesis = Genesis::default();
genesis.config.cancun_time = Some(0);
genesis.config.prague_time = Some(0);
genesis.config.osaka_time = Some(6000);
genesis.config.terminal_total_difficulty = Some(U256::ZERO);
let extra_fields_json = json!({
"berachain": {
"prague1": {
"time": 0,
"baseFeeChangeDenominator": 48,
"minimumBaseFeeWei": 1000000000,
"polDistributorAddress": "0x4200000000000000000000000000000000000042"
},
"prague2": {
"time": 0,
"minimumBaseFeeWei": 0
},
"osaka": {
"time": 5000
}
}
});
genesis.config.extra_fields =
reth::rpc::types::serde_helpers::OtherFields::try_from(extra_fields_json).unwrap();
let _chain_spec = BerachainChainSpec::from(genesis);
}

#[test]
fn test_osaka_matching_dual_config_accepted() {
let mut genesis = Genesis::default();
genesis.config.cancun_time = Some(0);
genesis.config.prague_time = Some(0);
genesis.config.osaka_time = Some(5000);
genesis.config.terminal_total_difficulty = Some(U256::ZERO);
let extra_fields_json = json!({
"berachain": {
"prague1": {
"time": 0,
"baseFeeChangeDenominator": 48,
"minimumBaseFeeWei": 1000000000,
"polDistributorAddress": "0x4200000000000000000000000000000000000042"
},
"prague2": {
"time": 0,
"minimumBaseFeeWei": 0
},
"osaka": {
"time": 5000
}
}
});
genesis.config.extra_fields =
reth::rpc::types::serde_helpers::OtherFields::try_from(extra_fields_json).unwrap();

let chain_spec = BerachainChainSpec::from(genesis);
assert!(chain_spec.is_osaka_active_at_timestamp(5000));
}
}
7 changes: 7 additions & 0 deletions src/evm/mod.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -323,6 +323,13 @@ mod tests {
SpecId::ISTANBUL, // Later spec - should have this precompile
"BLAKE2F",
),
// P256VERIFY (0x100) was added in Osaka (EIP-7951), should not exist in Prague
(
address!("0x0000000000000000000000000000000000000100"),
SpecId::PRAGUE, // Early spec - should NOT have this precompile
SpecId::OSAKA, // Later spec - should have this precompile
"P256VERIFY",
),
Comment thread
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];

for (precompile_addr, early_spec, later_spec, name) in specs_to_test {
Expand Down
15 changes: 15 additions & 0 deletions src/genesis/config.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -48,3 +48,18 @@ pub struct Prague4Config {
/// Unix timestamp when Prague4 activates (ending Prague3 restrictions)
pub time: u64,
}

/// Berachain-specific Osaka hardfork configuration (BRIP-0010)
///
/// Activates EthereumHardfork::Osaka on the EVM side, enabling:
/// - EIP-7951: P-256 (secp256r1) signature verification precompile at 0x100
/// - EIP-7939: CLZ (Count Leading Zeros) opcode
/// - EIP-7823/7883: MODEXP input bounds and gas repricing
/// - EIP-7934/7825: Block and transaction size caps
/// - Contract code size limit increase (24 KB -> 32 KB, initcode 48 KB -> 64 KB)
#[derive(Debug, Clone, Copy, Eq, PartialEq, Serialize, Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct OsakaConfig {
/// Unix timestamp when Osaka activates
pub time: u64,
}
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