From 18d96ffce6afcd133237e20034c368ced485c39d Mon Sep 17 00:00:00 2001
From: Christian Machacek <39452430+machacekch@users.noreply.github.com>
Date: Sat, 8 May 2021 13:39:00 +0200
Subject: [PATCH] Fix cross-program-invocation C example

Correctly check if deriving the PDA with the given seed was successful.
Don't pass the system program pubkey to the allocate instruction: the first account passed must be the one to be allocated.
---
 .../src/cross-program-invocation/cross-program-invocation.c  | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/examples/c/src/cross-program-invocation/cross-program-invocation.c b/examples/c/src/cross-program-invocation/cross-program-invocation.c
index 2745fcae..e13104cb 100644
--- a/examples/c/src/cross-program-invocation/cross-program-invocation.c
+++ b/examples/c/src/cross-program-invocation/cross-program-invocation.c
@@ -22,7 +22,7 @@ extern uint64_t do_invoke(SolParameters *params) {
   const SolSignerSeeds signers_seeds[] = {{seeds, SOL_ARRAY_SIZE(seeds)}};
 
   SolPubkey expected_allocated_key;
-  if (SUCCESS == sol_create_program_address(seeds, SOL_ARRAY_SIZE(seeds),
+  if (SUCCESS != sol_create_program_address(seeds, SOL_ARRAY_SIZE(seeds),
                                             params->program_id,
                                             &expected_allocated_key)) {
     return ERROR_INVALID_INSTRUCTION_DATA;
@@ -31,8 +31,7 @@ extern uint64_t do_invoke(SolParameters *params) {
     return ERROR_INVALID_ARGUMENT;
   }
 
-  SolAccountMeta arguments[] = {{system_program_info->key, false, false},
-                                {allocated_info->key, true, true}};
+  SolAccountMeta arguments[] = {{allocated_info->key, true, true}};
   uint8_t data[4 + 8];            // Enough room for the Allocate instruction
   *(uint16_t *)data = 8;          // Allocate instruction enum value
   *(uint64_t *)(data + 4) = SIZE; // Size to allocate