fix types

packages/xrpl/src/models/common/index.ts

@@ -75,6 +75,13 @@ export interface Sidechain {
   src_chain_issue: Currency
 }
 
+export interface XChainProofSig {
+  XChainProofSig: {
+    Signature: string
+    PublicKey: string
+  }
+}
+
 /**
  * This information is added to Transactions in request responses, but is not part
  * of the canonical Transaction information on ledger. These fields are denoted with

packages/xrpl/src/models/transactions/xChainClaim.ts

@@ -1,14 +1,8 @@
 import { ValidationError } from '../../errors'
-import { Sidechain } from '../common'
+import { Sidechain, XChainProofSig } from '../common'
 
 import { BaseTransaction, validateBaseTransaction } from './common'
 
-interface Signature {
-  signature: string
-
-  signing_key: string
-}
-
 /**
  * A XChainClaim transaction assigns, changes, or removes the regular key
  * pair associated with an account.
@@ -23,7 +17,7 @@ export interface XChainClaim extends BaseTransaction {
 
     sidechain: Sidechain
 
-    signatures: Signature[]
+    signatures: XChainProofSig[]
 
     was_src_chain_send: boolean