{
  "version": 1,
  "event_id": "evt_691a1efee48b1cbe",
  "url": "https://xiyu.news/events/evt_691a1efee48b1cbe/",
  "json": "https://xiyu.news/api/events/evt_691a1efee48b1cbe.json",
  "type": "protocol_change",
  "status": "monitoring",
  "category": "crypto",
  "title": {
    "zh": "【Base 完成 Cobalt 升级，新增条件交易并扩展了 B20 资产功能】",
    "en": "【Base 完成 Cobalt 升级，新增条件交易并扩展了 B20 资产功能】"
  },
  "current_state": {
    "zh": "Base 已完成第三次主网升级 Cobalt，该升级包含条件门控的 Validity Transactions、三项新的 B20 代币标准功能，以及针对 B20 的可选行政余额扣押规则（seizeWithMemo）。",
    "en": "Base completed its third mainnet upgrade, Cobalt, which includes condition-gated Validity Transactions, three new B20 token-standard features, and an opt-in administrative balance-seizure rule (seizeWithMemo) for B20 tokens."
  },
  "first_seen_at": "2026-10-01T06:31:01.983776+00:00",
  "last_updated_at": "2026-10-01T10:31:18.969699+00:00",
  "last_material_change_at": "2026-10-01T10:31:18.969699+00:00",
  "confidence": 0.75,
  "updates_count": 2,
  "sources_count": 2,
  "entities": [
    "b20",
    "base",
    "cobalt",
    "cobalt-upgrade",
    "token-balances"
  ],
  "identifiers": [],
  "topics": [
    "b20-token-standard",
    "base",
    "cobalt-upgrade",
    "condition-transactions",
    "layer-2",
    "protocol-upgrade",
    "token-balances"
  ],
  "updates": [
    {
      "update_id": "upd_4945fce66f27d14c",
      "event_id": "evt_691a1efee48b1cbe",
      "occurred_at": "2026-10-01T02:22:29Z",
      "published_at": "2026-10-01T02:22:29Z",
      "first_seen_at": "2026-10-01T06:31:01.983776Z",
      "time_precision": "published",
      "update_type": "initial",
      "material_change": true,
      "title_zh": "【Base 完成 Cobalt 升级，新增条件交易并扩展了 B20 资产功能】",
      "title_en": "【Base 完成 Cobalt 升级，新增条件交易并扩展了 B20 资产功能】",
      "what_changed_zh": "Base完成第三次主网升级Cobalt，新增条件门控的有效性交易和三项B20代币标准功能，并规划了迈向200毫秒出块时间、原生智能账户和Gas代付的路线图。",
      "what_changed_en": "Base completed its third mainnet upgrade, Cobalt, adding condition-gated Validity Transactions and three new B20 token-standard features, with a roadmap toward 200ms block times, native smart accounts, and gas sponsorship.",
      "current_state_zh": "Base完成第三次主网升级Cobalt，新增条件门控的有效性交易和三项B20代币标准功能，并规划了迈向200毫秒出块时间、原生智能账户和Gas代付的路线图。",
      "current_state_en": "Base completed its third mainnet upgrade, Cobalt, adding condition-gated Validity Transactions and three new B20 token-standard features, with a roadmap toward 200ms block times, native smart accounts, and gas sponsorship.",
      "detailed_summary_zh": "Base completed its third mainnet upgrade, Cobalt, adding condition-gated Validity Transactions and three new B20 token-standard features, with a roadmap toward 200ms block times, native smart accounts, and gas sponsorship.",
      "detailed_summary_en": "Base completed its third mainnet upgrade, Cobalt, adding condition-gated Validity Transactions and three new B20 token-standard features, with a roadmap toward 200ms block times, native smart accounts, and gas sponsorship.",
      "background_zh": "",
      "background_en": "",
      "community_discussion_zh": "",
      "community_discussion_en": "",
      "market_impact_zh": "",
      "market_impact_en": "",
      "importance_score": 7.5,
      "references": [],
      "confidence": 0.75,
      "story_ids": [
        "telegram:foresightnews:119557"
      ],
      "sources": [
        {
          "url": "https://foresightnews.pro/news/h5Detail/114387",
          "label": "foresightnews",
          "source_type": "telegram",
          "official": false
        }
      ]
    },
    {
      "update_id": "upd_cc38ccd8243983f5",
      "event_id": "evt_691a1efee48b1cbe",
      "occurred_at": "2026-10-01T07:30:48Z",
      "published_at": "2026-10-01T07:30:48Z",
      "first_seen_at": "2026-10-01T10:31:18.969699Z",
      "time_precision": "published",
      "update_type": "confirmation",
      "material_change": true,
      "title_zh": "Base的Cobalt升级新增一条影响代币余额的规则",
      "title_en": "Base’s Cobalt upgrade adds another rule to affect token balances",
      "what_changed_zh": "Cobalt 升级为 B20 代币引入可选的行政余额扣押规则（seizeWithMemo），要求发行方配置资格、SEIZE_ROLE 授权，并单独设置接收方策略，同时保留代币供应量，原有 burnBlocked 被弃用但仍可调用。",
      "what_changed_en": "The Cobalt upgrade introduces an opt-in administrative balance-seizure rule (seizeWithMemo) for B20 tokens, requiring issuer eligibility configuration, SEIZE_ROLE authorization, and a separate recipient policy, while preserving token supply and keeping burnBlocked deprecated but callable.",
      "current_state_zh": "Base 已完成第三次主网升级 Cobalt，该升级包含条件门控的 Validity Transactions、三项新的 B20 代币标准功能，以及针对 B20 的可选行政余额扣押规则（seizeWithMemo）。",
      "current_state_en": "Base completed its third mainnet upgrade, Cobalt, which includes condition-gated Validity Transactions, three new B20 token-standard features, and an opt-in administrative balance-seizure rule (seizeWithMemo) for B20 tokens.",
      "detailed_summary_zh": "Base's Cobalt upgrade introduces an opt-in administrative balance-seizure rule for B20 tokens, kept separate from ordinary transfer restrictions and requiring specific issuer eligibility and authorized roles.",
      "detailed_summary_en": "Base's Cobalt upgrade introduces an opt-in administrative balance-seizure rule for B20 tokens, kept separate from ordinary transfer restrictions and requiring specific issuer eligibility and authorized roles.",
      "background_zh": "",
      "background_en": "",
      "community_discussion_zh": "",
      "community_discussion_en": "",
      "market_impact_zh": "",
      "market_impact_en": "",
      "importance_score": 7.0,
      "references": [],
      "confidence": 0.9,
      "story_ids": [
        "rss:cryptoslate.com_feed_:533fa844e9da6e99"
      ],
      "sources": [
        {
          "url": "https://cryptoslate.com/bases-cobalt-upgrade-adds-another-rule-to-affect-token-balances/",
          "label": "CryptoSlate",
          "source_type": "rss",
          "official": false
        }
      ]
    }
  ]
}