Chain

The Chain method group contains methods for interacting with the blockchain, but that do not require any form of state computation.
ChainDeleteObj
ChainDeleteObj deletes node referenced by the given CID
Perms: admin
Inputs:
[
  {
    "/": "bafy2bzacea3wsdh6y3a36tb3skempjoxqpuyompjbmfeyf34fi3uy6uue42v4"
  }
]
Response: {}
ChainExport
ChainExport returns a stream of bytes with CAR dump of chain data. The exported chain data includes the header chain from the given tipset back to genesis, the entire genesis state, and the most recent ’nroots' state trees. If oldmsgskip is set, messages from before the requested roots are also not included.
Perms: read
Inputs:
[
  10101,
  true,
  [
    {
      "/": "bafy2bzacea3wsdh6y3a36tb3skempjoxqpuyompjbmfeyf34fi3uy6uue42v4"
    },
    {
      "/": "bafy2bzacebp3shtrn43k7g3unredz7fxn4gj533d3o43tqn2p2ipxxhrvchve"
    }
  ]
]
Response: "Ynl0ZSBhcnJheQ=="
ChainGetBlock
ChainGetBlock returns the block specified by the given CID.
Perms: read
Inputs:
[
  {
    "/": "bafy2bzacea3wsdh6y3a36tb3skempjoxqpuyompjbmfeyf34fi3uy6uue42v4"
  }
]
Response:
{
  "Miner": "f01234",
  "Ticket": {
    "VRFProof": "Ynl0ZSBhcnJheQ=="
  },
  "ElectionProof": {
    "WinCount": 9,
    "VRFProof": "Ynl0ZSBhcnJheQ=="
  },
  "BeaconEntries": [
    {
      "Round": 42,
      "Data": "Ynl0ZSBhcnJheQ=="
    }
  ],
  "WinPoStProof": [
    {
      "PoStProof": 8,
      "ProofBytes": "Ynl0ZSBhcnJheQ=="
    }
  ],
  "Parents": [
    {
      "/": "bafy2bzacea3wsdh6y3a36tb3skempjoxqpuyompjbmfeyf34fi3uy6uue42v4"
    }
  ],
  "ParentWeight": "0",
  "Height": 10101,
  "ParentStateRoot": {
    "/": "bafy2bzacea3wsdh6y3a36tb3skempjoxqpuyompjbmfeyf34fi3uy6uue42v4"
  },
  "ParentMessageReceipts": {
    "/": "bafy2bzacea3wsdh6y3a36tb3skempjoxqpuyompjbmfeyf34fi3uy6uue42v4"
  },
  "Messages": {
    "/": "bafy2bzacea3wsdh6y3a36tb3skempjoxqpuyompjbmfeyf34fi3uy6uue42v4"
  },
  "BLSAggregate": {
    "Type": 2,
    "Data": "Ynl0ZSBhcnJheQ=="
  },
  "Timestamp": 42,
  "BlockSig": {
    "Type": 2,
    "Data": "Ynl0ZSBhcnJheQ=="
  },
  "ForkSignaling": 42,
  "ParentBaseFee": "0"
}
ChainGetBlockMessages
ChainGetBlockMessages returns messages stored in the specified block.
Note: If there are multiple blocks in a tipset, it’s likely that some messages will be duplicated. It’s also possible for blocks in a tipset to have different messages from the same sender at the same nonce. When that happens, only the first message (in a block with lowest ticket) will be considered for execution
NOTE: THIS METHOD SHOULD ONLY BE USED FOR GETTING MESSAGES IN A SPECIFIC BLOCK
DO NOT USE THIS METHOD TO GET MESSAGES INCLUDED IN A TIPSET Use ChainGetParentMessages, which will perform correct message deduplication
Perms: read
Inputs:
[
  {
    "/": "bafy2bzacea3wsdh6y3a36tb3skempjoxqpuyompjbmfeyf34fi3uy6uue42v4"
  }
]
Response:
{
  "BlsMessages": [
    {
      "Version": 42,
      "To": "f01234",
      "From": "f01234",
      "Nonce": 42,
      "Value": "0",
      "GasLimit": 9,
      "GasFeeCap": "0",
      "GasPremium": "0",
      "Method": 1,
      "Params": "Ynl0ZSBhcnJheQ==",
      "CID": {
        "/": "bafy2bzacebbpdegvr3i4cosewthysg5xkxpqfn2wfcz6mv2hmoktwbdxkax4s"
      }
    }
  ],
  "SecpkMessages": [
    {
      "Message": {
        "Version": 42,
        "To": "f01234",
        "From": "f01234",
        "Nonce": 42,
        "Value": "0",
        "GasLimit": 9,
        "GasFeeCap": "0",
        "GasPremium": "0",
        "Method": 1,
        "Params": "Ynl0ZSBhcnJheQ==",
        "CID": {
          "/": "bafy2bzacebbpdegvr3i4cosewthysg5xkxpqfn2wfcz6mv2hmoktwbdxkax4s"
        }
      },
      "Signature": {
        "Type": 2,
        "Data": "Ynl0ZSBhcnJheQ=="
      },
      "CID": {
        "/": "bafy2bzacebbpdegvr3i4cosewthysg5xkxpqfn2wfcz6mv2hmoktwbdxkax4s"
      }
    }
  ],
  "Cids": [
    {
      "/": "bafy2bzacea3wsdh6y3a36tb3skempjoxqpuyompjbmfeyf34fi3uy6uue42v4"
    }
  ]
}
ChainGetGenesis
ChainGetGenesis returns the genesis tipset.
Perms: read
Inputs: null
Response:
{
  "Cids": null,
  "Blocks": null,
  "Height": 0
}
ChainGetMessage
ChainGetMessage reads a message referenced by the specified CID from the chain blockstore.
Perms: read
Inputs:
[
  {
    "/": "bafy2bzacea3wsdh6y3a36tb3skempjoxqpuyompjbmfeyf34fi3uy6uue42v4"
  }
]
Response:
{
  "Version": 42,
  "To": "f01234",
  "From": "f01234",
  "Nonce": 42,
  "Value": "0",
  "GasLimit": 9,
  "GasFeeCap": "0",
  "GasPremium": "0",
  "Method": 1,
  "Params": "Ynl0ZSBhcnJheQ==",
  "CID": {
    "/": "bafy2bzacebbpdegvr3i4cosewthysg5xkxpqfn2wfcz6mv2hmoktwbdxkax4s"
  }
}
ChainGetMessagesInTipset
ChainGetMessagesInTipset returns message stores in current tipset
Perms: read
Inputs:
[
  [
    {
      "/": "bafy2bzacea3wsdh6y3a36tb3skempjoxqpuyompjbmfeyf34fi3uy6uue42v4"
    },
    {
      "/": "bafy2bzacebp3shtrn43k7g3unredz7fxn4gj533d3o43tqn2p2ipxxhrvchve"
    }
  ]
]
Response:
[
  {
    "Cid": {
      "/": "bafy2bzacea3wsdh6y3a36tb3skempjoxqpuyompjbmfeyf34fi3uy6uue42v4"
    },
    "Message": {
      "Version": 42,
      "To": "f01234",
      "From": "f01234",
      "Nonce": 42,
      "Value": "0",
      "GasLimit": 9,
      "GasFeeCap": "0",
      "GasPremium": "0",
      "Method": 1,
      "Params": "Ynl0ZSBhcnJheQ==",
      "CID": {
        "/": "bafy2bzacebbpdegvr3i4cosewthysg5xkxpqfn2wfcz6mv2hmoktwbdxkax4s"
      }
    }
  }
]
ChainGetNode
Perms: read
Inputs:
[
  "string value"
]
Response:
{
  "Cid": {
    "/": "bafy2bzacea3wsdh6y3a36tb3skempjoxqpuyompjbmfeyf34fi3uy6uue42v4"
  },
  "Obj": {}
}
ChainGetParentMessages
ChainGetParentMessages returns messages stored in parent tipset of the specified block.
Perms: read
Inputs:
[
  {
    "/": "bafy2bzacea3wsdh6y3a36tb3skempjoxqpuyompjbmfeyf34fi3uy6uue42v4"
  }
]
Response:
[
  {
    "Cid": {
      "/": "bafy2bzacea3wsdh6y3a36tb3skempjoxqpuyompjbmfeyf34fi3uy6uue42v4"
    },
    "Message": {
      "Version": 42,
      "To": "f01234",
      "From": "f01234",
      "Nonce": 42,
      "Value": "0",
      "GasLimit": 9,
      "GasFeeCap": "0",
      "GasPremium": "0",
      "Method": 1,
      "Params": "Ynl0ZSBhcnJheQ==",
      "CID": {
        "/": "bafy2bzacebbpdegvr3i4cosewthysg5xkxpqfn2wfcz6mv2hmoktwbdxkax4s"
      }
    }
  }
]
ChainGetParentReceipts
ChainGetParentReceipts returns receipts for messages in parent tipset of the specified block. The receipts in the list returned is one-to-one with the messages returned by a call to ChainGetParentMessages with the same blockCid.
Perms: read
Inputs:
[
  {
    "/": "bafy2bzacea3wsdh6y3a36tb3skempjoxqpuyompjbmfeyf34fi3uy6uue42v4"
  }
]
Response:
[
  {
    "ExitCode": 0,
    "Return": "Ynl0ZSBhcnJheQ==",
    "GasUsed": 9
  }
]
ChainGetPath
ChainGetPath returns a set of revert/apply operations needed to get from one tipset to another, for example:
       to
        ^
from   tAA
  ^     ^
tBA    tAB
 ^---*--^
     ^
    tRR
Would return [revert(tBA), apply(tAB), apply(tAA)]
Perms: read
Inputs:
[
  [
    {
      "/": "bafy2bzacea3wsdh6y3a36tb3skempjoxqpuyompjbmfeyf34fi3uy6uue42v4"
    },
    {
      "/": "bafy2bzacebp3shtrn43k7g3unredz7fxn4gj533d3o43tqn2p2ipxxhrvchve"
    }
  ],
  [
    {
      "/": "bafy2bzacea3wsdh6y3a36tb3skempjoxqpuyompjbmfeyf34fi3uy6uue42v4"
    },
    {
      "/": "bafy2bzacebp3shtrn43k7g3unredz7fxn4gj533d3o43tqn2p2ipxxhrvchve"
    }
  ]
]
Response:
[
  {
    "Type": "string value",
    "Val": {
      "Cids": null,
      "Blocks": null,
      "Height": 0
    }
  }
]
ChainGetRandomnessFromBeacon
ChainGetRandomnessFromBeacon is used to sample the beacon for randomness.
Perms: read
Inputs:
[
  [
    {
      "/": "bafy2bzacea3wsdh6y3a36tb3skempjoxqpuyompjbmfeyf34fi3uy6uue42v4"
    },
    {
      "/": "bafy2bzacebp3shtrn43k7g3unredz7fxn4gj533d3o43tqn2p2ipxxhrvchve"
    }
  ],
  2,
  10101,
  "Ynl0ZSBhcnJheQ=="
]
Response: "Bw=="
ChainGetRandomnessFromTickets
ChainGetRandomnessFromTickets is used to sample the chain for randomness.
Perms: read
Inputs:
[
  [
    {
      "/": "bafy2bzacea3wsdh6y3a36tb3skempjoxqpuyompjbmfeyf34fi3uy6uue42v4"
    },
    {
      "/": "bafy2bzacebp3shtrn43k7g3unredz7fxn4gj533d3o43tqn2p2ipxxhrvchve"
    }
  ],
  2,
  10101,
  "Ynl0ZSBhcnJheQ=="
]
Response: "Bw=="
ChainGetTipSet
ChainGetTipSet returns the tipset specified by the given TipSetKey.
Perms: read
Inputs:
[
  [
    {
      "/": "bafy2bzacea3wsdh6y3a36tb3skempjoxqpuyompjbmfeyf34fi3uy6uue42v4"
    },
    {
      "/": "bafy2bzacebp3shtrn43k7g3unredz7fxn4gj533d3o43tqn2p2ipxxhrvchve"
    }
  ]
]
Response:
{
  "Cids": null,
  "Blocks": null,
  "Height": 0
}
ChainGetTipSetByHeight
ChainGetTipSetByHeight looks back for a tipset at the specified epoch. If there are no blocks at the specified epoch, a tipset at an earlier epoch will be returned.
Perms: read
Inputs:
[
  10101,
  [
    {
      "/": "bafy2bzacea3wsdh6y3a36tb3skempjoxqpuyompjbmfeyf34fi3uy6uue42v4"
    },
    {
      "/": "bafy2bzacebp3shtrn43k7g3unredz7fxn4gj533d3o43tqn2p2ipxxhrvchve"
    }
  ]
]
Response:
{
  "Cids": null,
  "Blocks": null,
  "Height": 0
}
ChainHasObj
ChainHasObj checks if a given CID exists in the chain blockstore.
Perms: read
Inputs:
[
  {
    "/": "bafy2bzacea3wsdh6y3a36tb3skempjoxqpuyompjbmfeyf34fi3uy6uue42v4"
  }
]
Response: true
ChainHead
ChainHead returns the current head of the chain.
Perms: read
Inputs: null
Response:
{
  "Cids": null,
  "Blocks": null,
  "Height": 0
}
ChainNotify
ChainNotify returns channel with chain head updates. First message is guaranteed to be of length 1, and type current.
Perms: read
Inputs: null
Response:
[
  {
    "Type": "string value",
    "Val": {
      "Cids": null,
      "Blocks": null,
      "Height": 0
    }
  }
]
ChainReadObj
ChainReadObj reads IPLD nodes referenced by the specified CID from chain blockstore and returns raw bytes.
Perms: read
Inputs:
[
  {
    "/": "bafy2bzacea3wsdh6y3a36tb3skempjoxqpuyompjbmfeyf34fi3uy6uue42v4"
  }
]
Response: "Ynl0ZSBhcnJheQ=="
ChainSetHead
ChainSetHead forcefully sets current chain head. Use with caution.
Perms: admin
Inputs:
[
  [
    {
      "/": "bafy2bzacea3wsdh6y3a36tb3skempjoxqpuyompjbmfeyf34fi3uy6uue42v4"
    },
    {
      "/": "bafy2bzacebp3shtrn43k7g3unredz7fxn4gj533d3o43tqn2p2ipxxhrvchve"
    }
  ]
]
Response: {}
ChainStatObj
ChainStatObj returns statistics about the graph referenced by ‘obj’. If ‘base’ is also specified, then the returned stat will be a diff between the two objects.
Perms: read
Inputs:
[
  {
    "/": "bafy2bzacea3wsdh6y3a36tb3skempjoxqpuyompjbmfeyf34fi3uy6uue42v4"
  },
  {
    "/": "bafy2bzacea3wsdh6y3a36tb3skempjoxqpuyompjbmfeyf34fi3uy6uue42v4"
  }
]
Response:
{
  "Size": 42,
  "Links": 42
}
ChainTipSetWeight
ChainTipSetWeight computes weight for the specified tipset.
Perms: read
Inputs:
[
  [
    {
      "/": "bafy2bzacea3wsdh6y3a36tb3skempjoxqpuyompjbmfeyf34fi3uy6uue42v4"
    },
    {
      "/": "bafy2bzacebp3shtrn43k7g3unredz7fxn4gj533d3o43tqn2p2ipxxhrvchve"
    }
  ]
]
Response: "0"
Beacon
Client
Last modified 1mo ago