fix: handle when there are no transactions in a block (#24)

* fix: handle when there are no transactions in a block
algorandfoundation · Mar 18, 2024 · 67f48c9 · 67f48c9
1 parent 0491b32
commit 67f48c9
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diff --git a/docs/code/interfaces/types_block.Block.md b/docs/code/interfaces/types_block.Block.md
@@ -235,7 +235,7 @@ ___
 
 ### txns
 
-• **txns**: [`BlockTransaction`](types_block.BlockTransaction.md)[]
+• `Optional` **txns**: [`BlockTransaction`](types_block.BlockTransaction.md)[]
 
 The transactions within the block.
 

diff --git a/src/transform.ts b/src/transform.ts
@@ -49,7 +49,7 @@ export function getBlockTransactions(block: Block): TransactionInBlock[] {
   let offset = 0
   const getOffset = () => offset++
 
-  return block.txns.flatMap((blockTransaction, roundIndex) => {
+  return (block.txns ?? []).flatMap((blockTransaction, roundIndex) => {
     let parentOffset = 0
     const getParentOffset = () => parentOffset++
     const parentData = extractTransactionFromBlockTransaction(blockTransaction, block)

diff --git a/src/types/block.ts b/src/types/block.ts
@@ -52,7 +52,7 @@ export interface Block {
    */
   txn256: string
   /** The transactions within the block. */
-  txns: BlockTransaction[]
+  txns?: BlockTransaction[]
 }
 
 /** Data that is returned in a raw Algorand block for a single transaction