[feat] Generate most important blocks

[TAdev0]

@maciejka I encountered a curious issue while generating the blocks:

• blocks 0, 170, 24835 and 57043 are generated correctly

all other blocks generate a weird output for value in TxOut , for example:

  value: 1573890.9999999998_u64,

Basically, not all but some value (a lot, actually) in TxOut in all these blocks are generated with a dot, with various number of 9 after that (or 0 like value: 114936575.00000001_u64,), ending with any number between 1 and 9.

Example of random tx in block 420000 :

Transaction {
        version: 1,
        is_segwit: false,
        inputs: array![TxIn {
        script: from_base16("00483045022100b550b7ea029bdea3e37644fde28992aef0676e093accc81d59d783c8c37c960102207aabcfbe8c079df18cfd64e087cc59d81806ff2a401c755e91f655a15b1be96001483045022100ba64c25a88baff572dc42253470037e8bc9148ce32022071dca8027918a2a8e602201abfd2ea4930d71dfaa1af0b75dd8c22889dcf3864c35d3d4abeb3fe9cc0190901475221030f68ba91e3aa3e521faa5a10b7301436d4cf651466e9bf0515f9dd6876a420cd21025ac4139197851bf65160bcbdaa9cdeb3708e7a8c9253b1b51ee57bcf17ac66c252ae"),
        sequence: 4294967295,
        previous_output: OutPoint {
            txid: 0x7e113e616350d46d3ae3657d7240fcc4ae3a418711cf67ac57c470126e2ed5fd,
            vout: 1,
            txo_index: 0, // TODO: implement
        },
        witness: @""
    }].span(),
        outputs: array![TxOut {
        value: 4890910_u64,
        pk_script: from_base16("76a91460133067343855e64d7296dc27ea1d1598d0dadf88ac"),
    },
TxOut {
        value: 3343669950.9999995_u64,
        pk_script: from_base16("a91400dc0c864884c2e79df7eb20202d7a02056be3c287"),
    }].span(),
        lock_time: 0
    },

first TxOut is correct, second one is not correct.

Any idea whats going on?

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[maciejka]

@maciejka I encountered a curious issue while generating the blocks:

• blocks 0, 170, 24835 and 57043 are generated correctly

all other blocks generate a weird output for value in TxOut , for example:

  value: 1573890.9999999998_u64,

Basically, not all but some value (a lot, actually) in TxOut in all these blocks are generated with a dot, with various number of 9 after that, ending with any number between 1 and 9.

Example of random tx in block 420000 :

Transaction {
        version: 1,
        is_segwit: false,
        inputs: array![TxIn {
        script: from_base16("00483045022100b550b7ea029bdea3e37644fde28992aef0676e093accc81d59d783c8c37c960102207aabcfbe8c079df18cfd64e087cc59d81806ff2a401c755e91f655a15b1be96001483045022100ba64c25a88baff572dc42253470037e8bc9148ce32022071dca8027918a2a8e602201abfd2ea4930d71dfaa1af0b75dd8c22889dcf3864c35d3d4abeb3fe9cc0190901475221030f68ba91e3aa3e521faa5a10b7301436d4cf651466e9bf0515f9dd6876a420cd21025ac4139197851bf65160bcbdaa9cdeb3708e7a8c9253b1b51ee57bcf17ac66c252ae"),
        sequence: 4294967295,
        previous_output: OutPoint {
            txid: 0x7e113e616350d46d3ae3657d7240fcc4ae3a418711cf67ac57c470126e2ed5fd,
            vout: 1,
            txo_index: 0, // TODO: implement
        },
        witness: @""
    }].span(),
        outputs: array![TxOut {
        value: 4890910_u64,
        pk_script: from_base16("76a91460133067343855e64d7296dc27ea1d1598d0dadf88ac"),
    },
TxOut {
        value: 3343669950.9999995_u64,
        pk_script: from_base16("a91400dc0c864884c2e79df7eb20202d7a02056be3c287"),
    }].span(),
        lock_time: 0
    },

first TxOut is correct, second one is not correct.

Any idea whats going on?

there is a multiplication in the jq script:

def txout:
    "TxOut {
        value: \(.value*100000000)_u64,
        pk_script: from_base16(\"\(.scriptPubKey.hex)\"),
    }"
;

Value returned from the RPC is in Bitcoins not Satoshis. What exactly RPC returns as value? It is a result of using floating point representation. For now we should probably just round: (.value*100000000). Mid term we should move to python: https://github.com/keep-starknet-strange/raito/issues/28.

[TAdev0]

from https://developer.bitcoin.org/reference/rpc/getrawtransaction.html?highlight=getrawtransaction

   "value" : n,                   (numeric) The value in BTC

and we are multiplying by 10^8 in the block_filter so we should normally get the result in satoshi?

def txout:
    "TxOut {
        value: \(.value*100000000)_u64,
        pk_script: from_base16(\"\(.scriptPubKey.hex)\"),
    }"
;

[TAdev0]

@maciejka ok got it , will just round , its working fine like that. thanks!

[maciejka]

@maciejka ok got it , will just round , its working fine like that. thanks!

Some numbers are just not represented in floating point, try this in js console: 0.1 + 0.2. You will get closest approximation which is 0.30000000000000004

[TAdev0]

Ok now blocks are correctly built regarding value, i double checked and compared with block explorer.

Given that all these blocks are in Tests crate, running scarb test is like impossible now. Its been a few minutes on my M2 and its not compiled yet.

will comment the Blocks module in lib.cairo file of Tests crate for CI to pass. Dont know how we can make this work. Maybe adding the biggest block in bitcoin history is not a great idea?

[maciejka]

Ok now blocks are correctly built regarding value, i double checked and compared with block explorer.

Given that all these blocks are in Tests crate, running scarb test is like impossible now. Its been a few minutes on my M2 and its not compiled yet.

will comment the Blocks module in lib.cairo file of Tests crate for CI to pass. Dont know how we can make this work. Maybe adding the biggest block in bitcoin history is not a great idea?

Let's comment for now, we will see later how to handle them. Just add some explanation in the code.

[TAdev0]

@maciejka added a phrase to explain why its commented out

[maciejka]

@maciejka added a phrase to explain why its commented out

Comment out just those blocks that are too big.

[TAdev0]

@maciejka should be good like this