a simple program to fetch the bytes of a specific block (identified by slot and block hash) from a cardano network, useful for debugging the on-chain serialisation of blocks and transactions
Fetch the bytes of the block 33f1f63f10e82cf72e137b92e6d307be85e8a3ddd5b9131220734b82cd2974ae which was minted at slot 1363359 on the preview network:
$ cargo run -- --network preview --slot 1363359 --hash 33f1f63f10e82cf72e137b92e6d307be85e8a3ddd5b9131220734b82cd2974ae
820685828a19f45f1a0014cd9f582057b77bbddd4a8109decb6c1eec99103ac8110423b3380c22fd1a8974174135fb582023bb0a21009d...Print a diagnostic representation of the CBOR bytes of the first transaction in the block:
$ cargo run -- --network preview --slot 1363359 --hash 33f1f63f10e82cf72e137b92e6d307be85e8a3ddd5b9131220734b82cd2974ae --tx-at 0 --diag
84 # array(4)
a5 # map(5)
00 # unsigned(0)
82 # array(2)
82 # array(2)
58 20 # bytes(32)
17ee45f3e5e24b375a6b6ffc02aff2fa # "\x17\xeeE\xf3\xe5\xe2K7Zko\xfc\x02\xaf\xf2\xfa"
96be716e2762f10b45c584d8c308a048 # "\x96\xbeqn\'b\xf1\x0bE\xc5\x84\xd8\xc3\x08\xa0H"
00 # unsigned(0)
82 # array(2)
...$ cargo run -- --help
Usage: fetch-block [OPTIONS] --network <NETWORK> --slot <BLOCK_SLOT> --hash <BLOCK_HASH_HEX>
Options:
--network <NETWORK> The Cardano network from which to fetch the block from [possible values: preview, preprod, mainnet]
--slot <BLOCK_SLOT> The slot of the block to fetch
--hash <BLOCK_HASH_HEX> The block hash of the block to fetch
--tx-at <TX_INDEX> (Optional) Return only the transaction at this index in the block
--diag Print a diagnostic representation of the CBOR
-h, --help Print help information
-V, --version Print version information