static enum protocol_ecode check_ref(struct state *state,
const struct block *block,
const struct protocol_input_ref *ref)
{
struct block *b = block_ancestor(block, le32_to_cpu(ref->blocks_ago));
if (!b)
return PROTOCOL_ECODE_REF_BAD_BLOCKS_AGO;
/* Beyond horizon? */
if (le32_to_cpu(b->tailer->timestamp) + PROTOCOL_TX_HORIZON_SECS(state->test_net)
< le32_to_cpu(block->tailer->timestamp))
return PROTOCOL_ECODE_REF_BAD_BLOCKS_AGO;
if (le16_to_cpu(ref->shard) >= num_shards(b->hdr))
return PROTOCOL_ECODE_REF_BAD_SHARD;
if (ref->txoff >= b->shard_nums[le16_to_cpu(ref->shard)])
return PROTOCOL_ECODE_REF_BAD_TXOFF;
return PROTOCOL_ECODE_NONE;
}
int main(int argc, char *argv[])
{
unsigned long long tps, tsize, trans_per_block, merkles_per_block,
blocksize, shard_order, txbytes_per_sec, blockbytes_per_sec;
if (argc != 2)
errx(1, "Usage: sizes <tps>");
tps = atoi(argv[1]);
tsize = sizeof(struct protocol_tx_normal)
+ sizeof(struct protocol_input) * AVERAGE_INPUTS;
printf("# Assuming %f average inputs => tsize %llu bytes\n",
AVERAGE_INPUTS, tsize);
trans_per_block = tps * PROTOCOL_BLOCK_TARGET_TIME(false);
printf("Transactions per block: %llu\n", trans_per_block);
/* Increase shard order until shards are half full. */
for (shard_order = PROTOCOL_INITIAL_SHARD_ORDER;
(128 << shard_order) < trans_per_block;
shard_order++);
printf("Shards: (2^%llu) %llu\n", shard_order, 1ULL << shard_order);
if (shard_order > 16) {
printf("*** Truncating shards to 2^16 (need u32 shardnum!)\n");
shard_order = 16;
}
merkles_per_block = (1 << shard_order);
blocksize = sizeof(struct protocol_block_header)
+ merkles_per_block * sizeof(struct protocol_double_sha)
+ merkles_per_block * PROTOCOL_PREV_BLOCK_TXHASHES
+ sizeof(struct protocol_block_tailer);
printf("Block size: %llu\n", blocksize);
txbytes_per_sec = tps * tsize;
blockbytes_per_sec = blocksize / PROTOCOL_BLOCK_TARGET_TIME(false);
printf("%-15s%15s%15s%15s %s\n",
"", "Transactions", "Blocks", "Total", "Units");
/* Miners need every transaction + every block. */
printf("%-15s%15llu%15llu%15llu %s\n",
"Miners pipe",
txbytes_per_sec, blockbytes_per_sec,
txbytes_per_sec + blockbytes_per_sec,
"bytes per second");
printf("%-15s%15llu%15llu%25s\n",
"Miners storage",
txbytes_per_sec * PROTOCOL_TX_HORIZON_SECS(false),
blockbytes_per_sec * PROTOCOL_TX_HORIZON_SECS(false),
format_si(txbytes_per_sec * PROTOCOL_TX_HORIZON_SECS(false)
+ blockbytes_per_sec * PROTOCOL_TX_HORIZON_SECS(false)));
/* Minimal node needs two shards + every block. */
txbytes_per_sec >>= shard_order - 1;
printf("%-15s%15llu%15llu%15llu %s\n",
"Minimal pipe",
txbytes_per_sec, blockbytes_per_sec,
txbytes_per_sec + blockbytes_per_sec,
"bytes per second");
printf("%-15s%15llu%15llu%25s\n",
"Minimal storage",
txbytes_per_sec * PROTOCOL_TX_HORIZON_SECS(false),
blockbytes_per_sec * PROTOCOL_TX_HORIZON_SECS(false),
format_si(txbytes_per_sec * PROTOCOL_TX_HORIZON_SECS(false)
+ blockbytes_per_sec * PROTOCOL_TX_HORIZON_SECS(false)));
return 0;
}
/* When do transactions in this block expire? */
u32 block_expiry(struct state *state, const struct block_info *bi)
{
return block_timestamp(bi)
+ PROTOCOL_TX_HORIZON_SECS(state->test_net);
}
