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diff --git a/src/script/standard.h b/src/script/standard.h
--- a/src/script/standard.h
+++ b/src/script/standard.h
@@ -50,7 +50,8 @@
static const uint32_t MANDATORY_SCRIPT_VERIFY_FLAGS =
SCRIPT_VERIFY_P2SH | SCRIPT_VERIFY_STRICTENC |
SCRIPT_ENABLE_SIGHASH_FORKID | SCRIPT_VERIFY_LOW_S |
- SCRIPT_VERIFY_NULLFAIL | SCRIPT_VERIFY_MINIMALDATA;
+ SCRIPT_VERIFY_NULLFAIL | SCRIPT_VERIFY_MINIMALDATA |
+ SCRIPT_ENABLE_SCHNORR_MULTISIG;
enum txnouttype {
TX_NONSTANDARD,
diff --git a/src/validation.cpp b/src/validation.cpp
--- a/src/validation.cpp
+++ b/src/validation.cpp
@@ -801,10 +801,6 @@
extraFlags |= SCRIPT_VERIFY_CHECKDATASIG_SIGOPS;
}
- if (IsGravitonEnabledForCurrentBlock(consensusParams)) {
- extraFlags |= SCRIPT_ENABLE_SCHNORR_MULTISIG;
- }
-
// Make sure whatever we need to activate is actually activated.
const uint32_t scriptVerifyFlags =
STANDARD_SCRIPT_VERIFY_FLAGS | extraFlags;
diff --git a/test/functional/abc-schnorrmultisig-activation.py b/test/functional/abc-schnorrmultisig-activation.py
--- a/test/functional/abc-schnorrmultisig-activation.py
+++ b/test/functional/abc-schnorrmultisig-activation.py
@@ -215,7 +215,7 @@
ecdsa0tx = create_fund_and_spend_tx(OP_0, 'ecdsa')
ecdsa0tx_2 = create_fund_and_spend_tx(OP_0, 'ecdsa')
- # two of these, which are valid before upgrade and invalid after.
+ # two of these, which are nonstandard before upgrade and invalid after.
ecdsa1tx = create_fund_and_spend_tx(OP_1, 'ecdsa')
ecdsa1tx_2 = create_fund_and_spend_tx(OP_1, 'ecdsa')
@@ -233,6 +233,26 @@
self.log.info("Sending rejected transactions via RPC")
assert_raises_rpc_error(-26, SCHNORR_LEGACY_MULTISIG_ERROR,
node.sendrawtransaction, ToHex(schnorr0tx))
+ # Since MULTISIG_SCHNORR is in mandatory flags, we are not accepting
+ # non-null-dummy ECDSA transactions before the upgrade. We get a
+ # post-upgrade error since the mempool is using post-upgrade flags.
+ assert_raises_rpc_error(-26, POSTUPGRADE_ECDSA_NULLDUMMY_ERROR,
+ node.sendrawtransaction, ToHex(ecdsa1tx))
+
+ # The Schnorr multisig almost gets accepted here but it finally gets
+ # caught in the block flags check. Note that "BUG! PLEASE REPORT
+ # THIS!" will appear in the log, since AcceptToMemoryPoolWorker expects
+ # that scriptVerifyFlags is more strict than nextBlockScriptVerifyFlags.
+ # For strictly subtractive ('soft forking') flags, it is fine if they
+ # are always part of scriptVerifyFlags and only sometimes appear in
+ # nextBlockScriptVerifyFlags, but for additive flags this kind of
+ # strange situation can be created.
+ # In practice, only new nodes will ever be in a pre-upgrade state,
+ # and they will also be in initial block download mode and hence
+ # not request transactions from peers. So, this weird log message
+ # could only be triggered by unsolicited submission of a tx, and
+ # it would be benign since the node is behaving correctly by rejecting
+ # the transaction (as tested here).
assert_raises_rpc_error(-26, PREUPGRADE_SCHNORR_MULTISIG_ERROR,
node.sendrawtransaction, ToHex(schnorr1tx))
@@ -240,6 +260,10 @@
"Sending rejected transactions via net (bannable)")
self.check_for_ban_on_rejected_tx(
schnorr0tx, SCHNORR_LEGACY_MULTISIG_ERROR)
+ self.check_for_ban_on_rejected_tx(
+ ecdsa1tx, POSTUPGRADE_ECDSA_NULLDUMMY_ERROR)
+ # If we are sent unsolicited post-upgrade transactions while before
+ # the upgrade block, the tx is to be rejected.
self.check_for_ban_on_rejected_tx(
schnorr1tx, PREUPGRADE_SCHNORR_MULTISIG_ERROR)
@@ -286,7 +310,6 @@
self.log.info(
"Mine the activation block itself, including a non-null-dummy ECDSA at the last possible moment")
- node.p2p.send_txs_and_test([ecdsa1tx], node)
tip = self.build_block(tip, [ecdsa1tx])
node.p2p.send_blocks_and_test([tip], node)
@@ -345,7 +368,7 @@
"Invalidating the upgrade block evicts the transactions valid only after upgrade")
node.invalidateblock(upgrade_block.hash)
assert_equal(set(node.getrawmempool()), {
- ecdsa0tx_2.hash, ecdsa1tx.hash})
+ ecdsa0tx_2.hash})
self.log.info("Return to our tip")
node.reconsiderblock(upgrade_block.hash)

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