![]() ![]() Chemical analysis of Phocaean coins reveals that they were 55% gold, but in Lydia it could be even lower, between 55 and 45% in Anatolia, on the other side, there were electrum with an amount of gold between 70 and 90%.Įgyptian mummified head covered with electrum / Image: Rama on Wikimedia CommonsĪs you can see, we go back to Greek antiquity and, in fact, electrum is mentioned in The Odyssey and in the Book of Ezekiel. This is because it is not an artificial alloy but a natural one, although it can also be manufactured, in which case the composition percentages change a little and the gold is reduced. John on Wikimedia CommonsĮlectrum, we said, is composed of gold and silver it has a proportion of four parts of the first and one of the second, but there are also traces of other metals such as platinum or, above all, copper. Electrum veins in a quartz rock / Image: James St. These are just a few, since others could be cited, including those of more uncertain composition, such as the Oricalc or the Tibetan Thokcha. There was hepatizon or black Corinthian bronze (copper or bronze alloyed with gold and silver) brass (copper with zinc), Indian panchaloa (made of the five sacred metals, gold, silver, copper, iron and zinc) or those that combined gold with copper, such as the tumbaga of pre-Hispanic America and the Japanese shakudō. Of course, there were more alloys in those remote times. ![]() Of the ancient alloys, probably the most significant case was the electrum, which mixed gold and silver, which had a certain prestige. And, in fact, this combination of copper and tin gives its name to a whole period of prehistory, so that we could perhaps consider it the most important until the appearance of others. If you know how bitcoin transactions works and what UTXO are, probably you prefer do your own coin selection manually based on the needs of a specific transaction.If we were to ask about a metal alloy used since the beginning of history, the unanimous answer would surely be bronze. the Coins tab is hidden by default on Electrum). There are multiple goal you may want achieve with a coin selection strategy and there is no one strategy that solves all problems, so wallets adopt different strategies depending on their priorities but these strategy are meant for unskilled user or user that don't care these things (eg. Is there a disadvantage or risk to doing this? I'm thinking there mustīe, otherwise Electrum would just do it automatically No, you are right, if you wish focus more on fee minimization instead of privacy, you can achieve better result doing so manually than rely on the Electrum coin control policy. This looks to me as though I can make the same transaction and incur a Third, it penalizes change that is too big. Second, it penalizes change that is quite different to the sent amount. Would come from reusing that address' remaining UTXOs. ![]() Reduce blockchain UTXO bloat, and reduce future privacy loss that Information leakage about sender holdings. This is from the Electrum source code and explain this choice: Attempts to better preserve user privacy.įirst, if any coin is spent from a user address, all coins are.Ĭompared to spending from other addresses to make up an amount, this reduces I could understand needing two inputs to the transaction if x was more than the amount associated with each one of my two "output points", but it isn't.Įlectrum used both UTXO, even if only one was needed, to protect your privacy albeit at the expense of higher fee. Am I missing something? Is there a disadvantage or risk to doing this? I'm thinking there must be, otherwise Electrum would just do it automatically. This looks to me as though I can make the same transaction and incur a smaller fee by using "coin control". If I start to make the same payment, the "Advanced" dialog now only shows one input and the transaction size is 226 bytes. If I go to the Coins tab, right click on one of the two "output points" and choose "Spend", Electrum shows a green banner saying "Coin control active". If go to the Send tab and start to make a payment to an address, then click "Pay." and then "Advanced", I can see two inputs, which seem to correspond to the two "output points" in the Coins tab and show the same amounts. Both of these show an amount much larger than x BTC. My Electrum wallet shows two "output points" in the Coins tab (with the same address). ![]()
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