XChainCreateBridge

(Requires the XChainBridge amendment )

The XChainCreateBridge transaction creates a new Bridge ledger object and defines a new cross-chain bridge entrance on the chain that the transaction is submitted on. It includes information about door accounts and assets for the bridge.

The transaction must be submitted first by the locking chain door account. To set up a valid bridge, door accounts on both chains must submit this transaction, in addition to setting up witness servers.

The complete production-grade setup would also include a SignerListSet transaction on the two door accounts for the witnesses’ signing keys, as well as disabling the door accounts’ master key. This ensures that the witness servers are truly in control of the funds.

Note

Each door account can only have one bridge. This prevents the creation of duplicate bridges for the same asset, which can cause asset imbalances on either chain.

Example XChainCreateBridge JSON

{
  "TransactionType": "XChainCreateBridge",
  "Account": "rhWQzvdmhf5vFS35vtKUSUwNZHGT53qQsg",
  "XChainBridge": {
    "LockingChainDoor": "rhWQzvdmhf5vFS35vtKUSUwNZHGT53qQsg",
    "LockingChainIssue": {
      "currency": "XRP"
    },
    "IssuingChainDoor": "rHb9CJAWyB4rj91VRWn96DkukG4bwdtyTh",
    "IssuingChainIssue": {
      "currency": "XRP"
    }
  },
  "SignatureReward": 200,
  "MinAccountCreateAmount": 1000000
}

XChainCreateBridge Fields

Field	JSON Type	Internal Type	Required?	Description
`MinAccountCreateAmount`	Currency Amount	Amount	No	The minimum amount, in XRP, required for a `XChainAccountCreateCommit` transaction. If this isn't present, the `XChainAccountCreateCommit` transaction will fail. This field can only be present on XRP-XRP bridges.
`SignatureReward`	Currency Amount	Amount	Yes	The total amount to pay the witness servers for their signatures. This amount will be split among the signers.
`XChainBridge`	XChainBridge	XChain_Bridge	Yes	The bridge (door accounts and assets) to create.

XChainBridge Fields

Field	JSON Type	Internal Type	Required?	Description
`IssuingChainDoor`	String	Account	Yes	The door account on the issuing chain. For an XRP-XRP bridge, this must be the genesis account (the account that is created when the network is first started, which contains all of the XRP).
`IssuingChainIssue`	Issue	Issue	Yes	The asset that is minted and burned on the issuing chain. For an IOU-IOU bridge, the issuer of the asset must be the door account on the issuing chain, to avoid supply issues.
`LockingChainDoor`	String	Account	Yes	The door account on the locking chain.
`LockingChainIssue`	Issue	Issue	Yes	The asset that is locked and unlocked on the locking chain.