{
  "about": "A public, append-only ledger. Each Idempotency-Key is counted exactly once. Verify it yourself: every hash is sha256(prev|n|at|key).",
  "sign": "curl -X POST https://sajjadumar.dev/ledger -H 'Idempotency-Key: any-string-you-like'",
  "formula": "sha256(prev|n|at|key)",
  "genesis": "0000000000000000000000000000000000000000000000000000000000000000",
  "count": 0,
  "head": "0000000000000000000000000000000000000000000000000000000000000000",
  "entries": []
}