{
      "name": "canton-margin-call",
      "domain": "Digital-Asset Rails",
      "title": "Canton Margin Call & Collateral Mobilization Chain",
      "description": "Margin computation (UMR/d499 for derivatives; GMRA/d349 for repo/SFT), collateral eligibility, and cash-leg finality.",
      "composer_url": "https://ainumbers.co/chaingraph/chains/canton-margin-call.html",
      "steps": [
        {
          "tool_id": "513-margin-call-collateral-mobilizer",
          "handoff": "branch,margin_required,collateral_gap feed Stage 2 collateral eligibility"
        },
        {
          "tool_id": "505-tokenized-collateral-eligibility-checker",
          "handoff": "hqla_tier,eligible_value feed Stage 3 cash-leg finality"
        },
        {
          "tool_id": "506-onchain-cash-leg-finality-checker",
          "handoff": "finality_verdict -- Exports margin call collateral mandate -- final stage"
        }
      ]
    }