Upgrader

saorsa_node::upgrade

Struct Upgrader 

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pub struct Upgrader { /* private fields */ }
Expand description

Upgrade orchestrator with rollback support.

Handles the complete upgrade lifecycle:

  1. Validate upgrade (prevent downgrade)
  2. Download new binary and signature
  3. Verify ML-DSA-65 signature
  4. Create backup of current binary
  5. Atomic replacement
  6. Rollback on failure

Implementations§

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impl Upgrader

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pub fn new() -> Self

Create a new upgrader with the current package version.

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pub fn current_version(&self) -> &Version

Get the current version.

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pub fn validate_upgrade(&self, info: &UpgradeInfo) -> Result<()>

Validate that the upgrade is allowed (prevents downgrade).

§Errors

Returns an error if the target version is older than or equal to current.

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pub fn create_backup(&self, current: &Path, rollback_dir: &Path) -> Result<()>

Create a backup of the current binary.

§Arguments
  • current - Path to the current binary
  • rollback_dir - Directory to store the backup
§Errors

Returns an error if the backup cannot be created.

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pub fn restore_from_backup( &self, current: &Path, rollback_dir: &Path, ) -> Result<()>

Restore binary from backup.

§Arguments
  • current - Path to restore to
  • rollback_dir - Directory containing the backup
§Errors

Returns an error if the backup cannot be restored.

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pub fn atomic_replace(&self, new_binary: &Path, target: &Path) -> Result<()>

Atomically replace the binary (rename on POSIX).

Preserves file permissions from the original binary.

§Arguments
  • new_binary - Path to the new binary
  • target - Path to replace
§Errors

Returns an error if the replacement fails.

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pub async fn perform_upgrade( &self, info: &UpgradeInfo, current_binary: &Path, rollback_dir: &Path, ) -> Result<UpgradeResult>

Perform upgrade with rollback support.

This is the main upgrade entry point. It:

  1. Validates the upgrade (prevents downgrade)
  2. Creates a backup of the current binary
  3. Downloads the new binary and signature
  4. Verifies the ML-DSA-65 signature
  5. Atomically replaces the binary
  6. Rolls back on any failure
§Arguments
  • info - Information about the upgrade to perform
  • current_binary - Path to the currently running binary
  • rollback_dir - Directory to store backup for rollback
§Errors

Returns an error only if both the upgrade AND rollback fail (critical).

Trait Implementations§

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impl Default for Upgrader

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fn default() -> Self

Returns the “default value” for a type. Read more

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