July 1, 2026

Get crypto-currency price at a timestamp without limits

I’m trying to get the price of a crypto-currency at a specific timestamp. So I used the API cryptocompare : https://www.cryptocompare.com/api/# For example : https://min-api.cryptocompare.com/data/pricehistorical?fsym=ETH&tsyms=USD&ts=mytimestamp This solution works well but I have some issues related […]

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Change derive path

I’ve used bitcoinj wallet and used derive path as below. public static final ImmutableList<ChildNumber> ACCOUNT_ZERO_PATH = ImmutableList.of(ChildNumber.ZERO_HARDENED); But I made changes in above path for generating bip44 standard addresses. public static final ImmutableList<ChildNumber> BIP44_ACCOUNT_ZERO_PATH =ImmutableList.of(new […]

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What is the purpose of the script like RETURN PUSHDATA(36)(…)

The example is in here: https://www.blockchain.com/BTC/tx/63910fdfa84db96bd1f28fead4c32f97388d5368c10059d035aac3c5f72fcdc0 Actually, there are two outputs DUP HASH160 PUSHDATA(20)[78ce48f88c94df3762da89dc8498205373a8ce6f] EQUALVERIFY CHECKSIG and RETURN PUSHDATA(36)[aa21a9ed9463ee420b10cbad1d997bfa132a89dc9ba3de04e7233e6e6954f1bc339ebb1a] The strange point is the first output has 12.77303443 BTC, the second is 0 BTC. There […]

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I can’t send a transaction from electrums cli

I am trying to send a transaction in the cli using electrum with the command ~$ electrum –testnet payto mvYrQck9VfujSanmwvQxiLab3fLuywGdvh 0.01 -f 0.002 Password: (I entered the correct password here) Q { “complete”: true, “final”: […]

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