Cross-chain bridges functionality is part of the proposed XLS-38d extension (Not Enabled) to the XRP Ledger protocol. There isn't an official amendment yet. Until there is an amendment, the details documented on these pages are subject to change frequently. [Source]

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This transaction can only be used for XRP-XRP bridges.

The XChainAccountCreateCommit transaction creates a new account for a witness server to submit transactions on an issuing chain.

Warning: This transaction should only be executed if the witness attestations will be reliably delivered to the destination chain. If the signatures aren't delivered, then account creation will be blocked until attestations are received. This can be used maliciously; to disable this transaction on XRP-XRP bridges, the bridge's MinAccountCreateAmount shouldn't be present.

Example XChainAccountCreateCommit JSON

  "Account": "rwEqJ2UaQHe7jihxGqmx6J4xdbGiiyMaGa",
  "Destination": "rD323VyRjgzzhY4bFpo44rmyh2neB5d8Mo",
  "TransactionType": "XChainAccountCreateCommit",
  "Amount": "20000000",
  "SignatureReward": "100",
  "XChainBridge": {
    "LockingChainDoor": "rMAXACCrp3Y8PpswXcg3bKggHX76V3F8M4",
    "LockingChainIssue": {
      "currency": "XRP"
    "IssuingChainDoor": "rHb9CJAWyB4rj91VRWn96DkukG4bwdtyTh",
    "IssuingChainIssue": {
      "currency": "XRP"

XChainAccountCreateCommit Fields

Field JSON Type Internal Type Required? Description
Amount Currency Amount AMOUNT Yes The amount, in XRP, to use for account creation. This must be greater than or equal to the MinAccountCreateAmount specified in the Bridge ledger object.
Destination string ACCOUNT Yes The destination account on the destination chain.
SignatureReward Currency Amount AMOUNT No The amount, in XRP, to be used to reward the witness servers for providing signatures. This must match the amount on the Bridge ledger object.
XChainBridge XChainBridge XCHAIN_BRIDGE Yes The bridge to create accounts for.

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.


XCHAIN_BRIDGE is a new field type introduced by XLS-38d.

Type Name Type Code Bit Length Length-prefixed? Description
XCHAIN_BRIDGE 25 Variable No A bridge between two blockchains, identified by the door accounts and issued assets on the locking chain and issuing chain. XCHAIN_BRIDGE is serialized in this order: locking chain door, locking chain issue, issuing chain door, issuing chain issue.