This adds a new package under dcrutil named txsort which implements a
standard lexicographical sort order of transaction inputs and outputs.
This is useful to standardize transactions for faster multi-party
agreement as well as preventing information leaks in a single-party use
case. It is a modified form of BIP69 which has been updated to account
for differences with Decred-specific transactions.
The sort order for transaction inputs is defined as follows:
- Previous transaction tree in ascending order
- Previous transaction hash (treated as a big-endian uint256)
lexicographically in ascending order
- Previous output index in ascending order
The sort order for transaction outputs is defined as follows:
- Amount in ascending order
- Public key script version in ascending order
- Raw public key script bytes lexicographically in ascending order
This change moves the hdkeychain package outside of the dcrutil
directory into its own top-level package. This change is being made
since hdkeychain only depends on dcrutil's address code, and if the
rpctest integration tests are ever moved outside of the dcrd repo,
hdkeychain will no longer be required to remain in dcrd to avoid a
cyclic dependency.
This merge commit adds the following code from the
github.com/decred/dcrutil package into a new
github.com/decred/dcrd/dcrutil package:
* Address handling
* Amount type
* AppDataDir func
* bitflags functions
* Block wrapper type
* Hash160 func
* Tx wrapper type
* WIF type
as well as all tests for this code.
The old github.com/decred/dcrutil/hdkeychain package has also been
merged and moved to github.com/decred/dcrd/dcrutil/hdkeychain.
dcrd packages have been updated to use the new packages and the dep
files have been updated for this change.
