Class: KairosMcp::Daemon::IdempotentChainRecorder

Inherits:
Object
  • Object
show all
Defined in:
lib/kairos_mcp/daemon/idempotent_chain_recorder.rb

Overview

IdempotentChainRecorder — wraps chain_record with proposal_id-based idempotency and retry logic.

Design (P3.2 v0.2 §6.3-6.4, M7):

- Uses proposal_id as externally-supplied idempotency key.
- Tracks recorded proposal_ids in a local ledger file.
- Retries up to MAX_RETRIES on failure, then pauses mandate.
- Recorded (successful) proposal_ids survive restart via ledger.
- Pending retries and exhausted entries are in-memory only;
  restart resets the retry budget (intentional: fresh attempt).

Constant Summary collapse

MAX_RETRIES = 
3

Instance Method Summary collapse

Constructor Details

#initialize(chain_tool:, ledger_path:, logger: nil) ⇒ IdempotentChainRecorder

Returns a new instance of IdempotentChainRecorder.

Parameters:

  • chain_tool (#call) —

    callable: (args) → result (the actual chain_record)

  • ledger_path (String) —

    path to the idempotency ledger

  • logger (Object, nil) (defaults to: nil) 


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# File 'lib/kairos_mcp/daemon/idempotent_chain_recorder.rb', line 25

def initialize(chain_tool:, ledger_path:, logger: nil)
  @chain_tool  = chain_tool
  @ledger_path = ledger_path
  @logger      = logger
  @recorded    = load_ledger
  @pending     = []  # Array of { proposal_id:, payload:, retries: }
  @exhausted   = []  # proposal_ids that exceeded MAX_RETRIES
end

Instance Method Details

#has_failures? ⇒ Boolean

True if any record has exhausted retries.

Returns:

  • (Boolean) 


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# File 'lib/kairos_mcp/daemon/idempotent_chain_recorder.rb', line 78

def has_failures?
  !@exhausted.empty?
end

#pending_count ⇒ Object

Number of pending (failed) chain records.



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# File 'lib/kairos_mcp/daemon/idempotent_chain_recorder.rb', line 73

def pending_count
  @pending.size
end

#record(payload) ⇒ Hash

Record a code_edit to the blockchain. Idempotent by proposal_id.

Parameters:

  • payload (Hash) —

    must contain :proposal_id

Returns:

  • (Hash) —

    { status: ‘recorded’|‘duplicate’|‘pending_retry’|‘failed’, … }

Raises:

  • (ArgumentError) 


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# File 'lib/kairos_mcp/daemon/idempotent_chain_recorder.rb', line 38

def record(payload)
  proposal_id = payload[:proposal_id] || payload['proposal_id']
  raise ArgumentError, 'proposal_id required' if proposal_id.to_s.empty?

  # Idempotency check
  if @recorded.include?(proposal_id)
    return { status: 'duplicate', proposal_id: proposal_id }
  end

  attempt_record(proposal_id, payload)
end

#retry_pending ⇒ Array<Hash>

Retry any pending records (call at cycle start or periodic tick).

Returns:

  • (Array<Hash>) —

    results for each retry attempt



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# File 'lib/kairos_mcp/daemon/idempotent_chain_recorder.rb', line 52

def retry_pending
  results = []
  remaining = []

  @pending.each do |entry|
    result = attempt_record(entry[:proposal_id], entry[:payload],
                            retry_count: entry[:retries], from_retry: true)
    results << result
    case result[:status]
    when 'pending_retry'
      remaining << entry.merge(retries: entry[:retries] + 1)
    when 'failed'
      @exhausted << entry[:proposal_id]
    end
  end

  @pending = remaining
  results
end