OpenChainGraph Suite · CONTRACT A3 · arch #5

Canton Margin Call & Collateral Mobilization Chain

Margin computation (UMR/d499 for derivatives; GMRA/d349 for repo/SFT), collateral eligibility, and cash-leg finality.

OpenChainGraph · 3 Steps attestation mandate Hash-Anchored §4 chain_depth:3 Client-Side · Zero PII
Chain Topology — Margin Call Collateral Mobilizer → Tokenized Collateral Eligibility Checker → On-Chain Cash-Leg Finality Checker
§4 Execution Hash · Chain Definition Anchor
execution_hash:computing…
Chain Stages · 3 Steps
1 ROOT · D0 node
Margin Call Collateral Mobilizer 513-margin-call-collateral-mobilizer
branch,margin_required,collateral_gap feed Stage 2 collateral eligibility
MCP Call · mobilize_margin_collateral
{
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "name": "mobilize_margin_collateral",
    "arguments": {}
  },
  "id": 1
}
2 D2 node
Tokenized Collateral Eligibility Checker 505-tokenized-collateral-eligibility-checker
hqla_tier,eligible_value feed Stage 3 cash-leg finality
MCP Call · check_tokenized_collateral_eligibility
{
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "name": "check_tokenized_collateral_eligibility",
    "arguments": {}
  },
  "id": 1
}
3 TERMINAL · D3 node
On-Chain Cash-Leg Finality Checker 506-onchain-cash-leg-finality-checker
finality_verdict -- Exports margin call collateral mandate -- final stage
MCP Call · check_cash_leg_finality
{
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "name": "check_cash_leg_finality",
    "arguments": {}
  },
  "id": 1
}
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