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Chore(docs): Additional documentation for xcc gas values #590

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Aug 19, 2022
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Chore(docs): Additional documentation for xcc gas values #590

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4 changes: 4 additions & 0 deletions engine-precompiles/src/native.rs
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Expand Up @@ -30,8 +30,12 @@ mod costs {
// TODO(#483): Determine the correct amount of gas
pub(super) const EXIT_TO_ETHEREUM_GAS: EthGas = EthGas::new(0);

/// Value determined experimentally based on tests and mainnet data. Example:
/// https://explorer.mainnet.near.org/transactions/5CD7NrqWpK3H8MAAU4mYEPuuWz9AqR9uJkkZJzw5b8PM#D1b5NVRrAsJKUX2ZGs3poKViu1Rgt4RJZXtTfMgdxH4S
pub(super) const FT_TRANSFER_GAS: NearGas = NearGas::new(10_000_000_000_000);

/// Value determined experimentally based on tests.
/// (No mainnet data available since this feature is not enabled)
#[cfg(feature = "error_refund")]
pub(super) const REFUND_ON_ERROR_GAS: NearGas = NearGas::new(5_000_000_000_000);

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3 changes: 3 additions & 0 deletions engine/src/xcc.rs
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Expand Up @@ -13,10 +13,13 @@ pub const ERR_NO_ROUTER_CODE: &str = "ERR_MISSING_XCC_BYTECODE";
pub const ERR_INVALID_ACCOUNT: &str = "ERR_INVALID_XCC_ACCOUNT";
pub const ERR_ATTACHED_NEAR: &str = "ERR_ATTACHED_XCC_NEAR";
pub const CODE_KEY: &[u8] = b"router_code";
/// Gas costs estimated from simulation tests.
pub const VERSION_UPDATE_GAS: NearGas = NearGas::new(5_000_000_000_000);
pub const INITIALIZE_GAS: NearGas = NearGas::new(15_000_000_000_000);
pub const UNWRAP_AND_REFUND_GAS: NearGas = NearGas::new(25_000_000_000_000);
pub const WITHDRAW_GAS: NearGas = NearGas::new(30_000_000_000_000);
/// Solidity selector for the withdrawToNear function
/// https://www.4byte.directory/signatures/?bytes4_signature=0x6b351848
pub const WITHDRAW_TO_NEAR_SELECTOR: [u8; 4] = [0x6b, 0x35, 0x18, 0x48];

pub use aurora_engine_precompiles::xcc::state::{
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9 changes: 9 additions & 0 deletions etc/xcc-router/src/lib.rs
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Expand Up @@ -20,9 +20,18 @@ enum StorageKey {
const CURRENT_VERSION: u32 = 1;

const ERR_ILLEGAL_CALLER: &str = "ERR_ILLEGAL_CALLER";
/// Gas cost estimated from mainnet data. Cost seems to consistently be 3 Tgas, but we add a
/// little more to be safe. Example:
/// https://explorer.mainnet.near.org/transactions/3U9SKbGKM3MchLa2hLTNuYLdErcEDneJGbGv1cHZXuvE#HsHabUdJ7DRJcseNa4GQTYwm8KtbB4mqsq2AUssJWWv6
const WNEAR_WITHDRAW_GAS: Gas = Gas(5_000_000_000_000);
/// Gas cost estimated from mainnet data. Example:
/// https://explorer.mainnet.near.org/transactions/5NbZ7SfrodNxeLcSkCmLAEdbZfbkk9cjqz3zSDwktKrk#D7un3c3Nxv7Ee3JpQSKiM97LbwCDFPbMo5iLoijGPXPM
const WNEAR_REGISTER_GAS: Gas = Gas(5_000_000_000_000);
/// Gas cost estimated from simulation tests.
const REFUND_GAS: Gas = Gas(5_000_000_000_000);
/// Registration amount computed from FT token source code, see
/// https://github.com/near/near-sdk-rs/blob/master/near-contract-standards/src/fungible_token/core_impl.rs#L50
/// https://github.com/near/near-sdk-rs/blob/master/near-contract-standards/src/fungible_token/storage_impl.rs#L101
const WNEAR_REGISTER_AMOUNT: u128 = 1_250_000_000_000_000_000_000;
/// Must match arora_engine_precompiles::xcc::state::STORAGE_AMOUNT
const REFUND_AMOUNT: u128 = 2_000_000_000_000_000_000_000_000;
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