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-rw-r--r--src/psbt.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/src/psbt.h b/src/psbt.h
index 83a729217b..af57994f3a 100644
--- a/src/psbt.h
+++ b/src/psbt.h
@@ -40,6 +40,10 @@ static constexpr uint8_t PSBT_OUT_BIP32_DERIVATION = 0x02;
// as a 0 length key which indicates that this is the separator. The separator has no value.
static constexpr uint8_t PSBT_SEPARATOR = 0x00;
+// BIP 174 does not specify a maximum file size, but we set a limit anyway
+// to prevent reading a stream indefinately and running out of memory.
+const std::streamsize MAX_FILE_SIZE_PSBT = 100000000; // 100 MiB
+
/** A structure for PSBTs which contain per-input information */
struct PSBTInput
{