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bitcoind: warn if their bitcoin config doesn't have walletbroadcast=0.

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Because we use the bitcoin wallet to create the anchor transaction, we
need to make sure it doesn't broadcast it; safest to check their config
for the option.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell
2016-01-22 06:41:49 +10:30
parent c51a8d804f
commit 34e32978b8
3 changed files with 37 additions and 0 deletions
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33
daemon/bitcoind.c
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@@ -10,6 +10,8 @@
#include <ccan/io/io.h>
#include <ccan/pipecmd/pipecmd.h>
#include <ccan/str/hex/hex.h>
#include <ccan/tal/grab_file/grab_file.h>
#include <ccan/tal/path/path.h>
#include <ccan/tal/str/str.h>
#include <ccan/tal/tal.h>
#include <errno.h>
@@ -293,3 +295,34 @@ void bitcoind_create_payment(struct lightningd_state *dstate,
start_bitcoin_cli(dstate, process_sendtoaddress, cb, peer,
"sendtoaddress", addr, amtstr, NULL);
}
/* We make sure they have walletbroadcast=0, so we don't broadcast
* the anchor. */
void check_bitcoind_config(struct lightningd_state *dstate)
{
void *ctx = tal(dstate, char);
char *path, *config, **lines;
size_t i;
path = path_simplify(ctx, path_join(ctx, path_cwd(ctx),
"../.bitcoin/bitcoin.conf"));
config = grab_file(ctx, path);
if (!config) {
log_unusual(dstate->base_log, "Could not open %s to check it",
path);
goto out;
}
lines = tal_strsplit(ctx, config, "\n", STR_NO_EMPTY);
for (i = 0; lines[i]; i++) {
if (tal_strreg(ctx, lines[i],
"^[ \t]*walletbroadcast[ \t]*=[ \t]*0"))
goto out;
}
log_unusual(dstate->base_log, "%s does not contain walletbroadcast=0",
path);
out:
tal_free(ctx);
}