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Author SHA1 Message Date
Rusty Russell c78afa9201 onchaind: use lowball fee instead of donating to miners. 
As of bitcoind 0.16.1, you can't send a single-input OP_RETURN output,
as you get 'tx-too-small'.

	sendrawtx exit 26, gave error code: -26?error message:?tx-size-small (code 64)?'

So instead we use the minimum fee we can, but otherwise ignore it and
don't wait for it to be mined.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
 2018-06-21 13:43:32 +02:00
practicalswift abf510740d Force the use of the POSIX C locale for all commands and their subprocesses 2018-04-27 14:02:59 +02:00
Rusty Russell 1764d6c907 grind_htlc_tx_fee: benchmark. 
Takes 15 seconds on my laptop to do the worst-case grind:

	$ onchaind/test/run-grind_feerate 250001
	250001 iterations in 15893 msec = 63574 nsec each

It's not worth optimizing as it's 75% in libsecp:

    29.65%  run-grind_feera  run-grind_feerate  [.] secp256k1_fe_mul_inner
    23.51%  run-grind_feera  run-grind_feerate  [.] secp256k1_fe_sqr_inner
    11.04%  run-grind_feera  run-grind_feerate  [.] secp256k1_gej_double_var.part.6.constprop.34
     9.56%  run-grind_feera  run-grind_feerate  [.] secp256k1_scalar_reduce_512
     5.70%  run-grind_feera  run-grind_feerate  [.] Round

Even forcing a compile with -O3 -flto, it's only 13883 msec = 55534 nsec each.

Fixes: #291
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
 2018-04-04 02:31:41 +00:00
Rusty Russell c52222848d onchaind: support tests. 
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
 2018-04-04 02:31:41 +00:00