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Merge pull request #810 from rating89us/patch-17

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ch06: fixing dust UTXO definition
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Will Binns 2021-03-04 19:12:52 +01:00 committed by GitHub
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@ -636,7 +636,7 @@ Let's look at some of the other +SIGHASH+ types and how they can be used in prac
+NONE+ :: This construction can be used to create a "bearer check" or "blank check" of a specific amount. It commits to the input, but allows the output locking script to be changed. Anyone can write their own bitcoin address into the output locking script and redeem the transaction. However, the output value itself is locked by the signature.
+NONE|ANYONECANPAY+ :: This construction can be used to build a "dust collector." Users who have tiny UTXO in their wallets can't spend these without the cost in fees exceeding the value of the dust. With this type of signature, the dust UTXO can be donated for anyone to aggregate and spend whenever they want.
+NONE|ANYONECANPAY+ :: This construction can be used to build a "dust collector." Users who have tiny UTXO in their wallets can't spend these because the cost in fees exceeds the value of the dust. With this type of signature, the dust UTXO can be donated for anyone to aggregate and spend whenever they want.
((("Bitmask Sighash Modes")))There are some proposals to modify or expand the +SIGHASH+ system. One such proposal is _Bitmask Sighash Modes_ by Blockstream's Glenn Willen, as part of the Elements project. This aims to create a flexible replacement for +SIGHASH+ types that allows "arbitrary, miner-rewritable bitmasks of inputs and outputs" that can express "more complex contractual precommitment schemes, such as signed offers with change in a distributed asset exchange."