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Since the activation of Segwit, transaction size is expressed in Weight Units (WU). Weight Units can be converted to a "virtual size" or virtual bytes (vB) by dividing by 4 and rounding up. The virtual size dictates how large your transaction is when paying fees. Non-Segwit Transactions For now, let's focus on Non-Segwit transactions. Each Non-Segwit byte ...


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"fundrawtransaction" and "walletcreatefundedpsbt" are wallet RPCs. They add inputs and change outputs from your wallet to aim for a specific feerate for the transaction. These operations inherently require the relevant wallet. Change addresses are generated by the sender's wallet, and inputs have to come from the wallet of the sender. If you don't have that ...


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You need to take a look at how fee_estimates.dat is written and interpreted. Basically it's composed of: MIN_VERSION CURRENT_VERSION CURRENT_TIP TIP_AT_LAST_START TIP_AT_LAST_STOP [ESTIMATES] [STATS] With CURRENT being "when writing", i.e. when stopping bitcoind. Here is the method writing the file, and here is the method reading this file (at startup). I ...


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