Port the 0.40.2 fix of TAI on master (#2485)

#2476

## Description
Port the fix released in 0.40.2
[here](#2476)

## Checklist
- [x] Breaking changes are clearly marked as such in the PR description
and changelog
- [x] New behavior is reflected in tests
- [x] [The specification](https://github.com/FuelLabs/fuel-specs/)
matches the implemented behavior (link update PR if changes are needed)

### Before requesting review
- [x] I have reviewed the code myself
- [x] I have created follow-up issues caused by this PR and linked them
here

CHANGELOG.md

@@ -36,6 +36,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 - [2369](https://github.com/FuelLabs/fuel-core/pull/2369): The `transaction_insertion_time_in_thread_pool_milliseconds` metric is properly collected.
 - [2413](https://github.com/FuelLabs/fuel-core/issues/2413): block production immediately errors if unable to lock the mutex.
 - [2389](https://github.com/FuelLabs/fuel-core/pull/2389): Fix construction of reverse iterator in RocksDB.
+- [2485](https://github.com/FuelLabs/fuel-core/pull/2485): Hardcode the timestamp of the genesis block and version of `tai64` to avoid breaking changes for us.
 
 ### Changed
 - [2295](https://github.com/FuelLabs/fuel-core/pull/2295): `CombinedDb::from_config` now respects `state_rewind_policy` with tmp RocksDB.

crates/client/Cargo.toml

@@ -27,7 +27,8 @@ itertools = { workspace = true }
 reqwest = { workspace = true }
 serde = { workspace = true, features = ["derive"] }
 serde_json = { version = "1.0", features = ["raw_value"] }
-tai64 = { version = "4.1", features = ["serde"] }
+# We force the version because 4.1.0 update leap seconds that breaks our timestamps
+tai64 = { version = "=4.0.0", features = ["serde"] }
 thiserror = "1.0"
 tracing = "0.1"
 

crates/fuel-core/src/service/genesis.rs

@@ -285,7 +285,8 @@ pub fn create_genesis_block(config: &Config) -> Block {
             consensus: ConsensusHeader::<Empty> {
                 prev_root,
                 height,
-                time: fuel_core_types::tai64::Tai64::UNIX_EPOCH,
+                // The time is set to UNIX_EPOCH + 10 leap seconds to make backward compatibility
+                time: fuel_core_types::tai64::Tai64(4611686018427387914),
                 generated: Empty,
             },
         },

crates/types/Cargo.toml

@@ -27,7 +27,8 @@ fuel-vm-private = { workspace = true, default-features = false, features = [
 rand = { workspace = true, optional = true }
 secrecy = "0.8"
 serde = { workspace = true, features = ["derive"], optional = true }
-tai64 = { version = "4.1", features = ["serde"] }
+# We force the version because 4.1.0 update leap seconds that breaks our timestamps
+tai64 = { version = "=4.0.0", features = ["serde"] }
 zeroize = "1.5"
 
 [features]

version-compatibility/forkless-upgrade/src/genesis.rs

@@ -0,0 +1,47 @@
+#![allow(non_snake_case)]
+use crate::tests_helper::{
+    LatestFuelCoreDriver,
+    IGNITION_TESTNET_SNAPSHOT,
+};
+use latest_fuel_core_type::fuel_tx::Bytes32;
+use std::str::FromStr;
+
+#[tokio::test(flavor = "multi_thread")]
+async fn test__genesis_block__hash() {
+    // Given
+    let latest_node = LatestFuelCoreDriver::spawn(&[
+        "--debug",
+        "--poa-instant",
+        "true",
+        "--snapshot",
+        IGNITION_TESTNET_SNAPSHOT,
+        "--enable-relayer",
+        "--relayer",
+        "https://google.com",
+        "--relayer-da-deploy-height",
+        "5791365",
+        "--relayer-v2-listening-contracts",
+        "0x768f9459E3339A1F7d59CcF24C80Eb4A711a01FB",
+    ])
+    .await
+    .unwrap();
+
+    // When
+    let original_block = latest_node
+        .client
+        .block_by_height(0u32.into())
+        .await
+        .expect("Failed to get blocks")
+        .expect("Genesis block should exists");
+    // Then
+    // The hash of the genesis block should always be
+    // `0x19ac99bf59711aca047b28443e599e26f733291c2fa45f5f309b2c5c9712b215`
+    // regardless of the changes that we made.
+    assert_eq!(
+        original_block.id,
+        Bytes32::from_str(
+            "0x19ac99bf59711aca047b28443e599e26f733291c2fa45f5f309b2c5c9712b215"
+        )
+        .unwrap()
+    )
+}

version-compatibility/forkless-upgrade/src/lib.rs

@@ -6,6 +6,8 @@ mod backward_compatibility;
 #[cfg(test)]
 mod forward_compatibility;
 #[cfg(test)]
+mod genesis;
+#[cfg(test)]
 pub(crate) mod tests_helper;
 
 #[cfg(test)]