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zcash-wallets

Zcash wallets made simple, javascript implementation of BIP 32 Bitcoin hierarchical deterministic keys for Zcash's t and z-addresses

History

<b>Please note that this module is now deprecated, please see bitcoin-transactions since it has been merged there</b>

Rationale

Create your Zcash t/z-addresses and wallets by your own and recover them from a seed you know if you lose them, this eliminates the constant need of wallets backup with the associated risks and this eliminates the risk of losing all of your addresses

Implementation, Details and Installation

Please see bitcoin-wallets

Zcash's z-addresses are not trivial to generate, this is not used for bitcoin addresses but you need SHA256Compress.js for Zcash

z-addresses are derived from a Zcash computation of the private keys belonging to the hardened m/n/0 branch as defined in BIP32 where n is the SUPER_MAGIC number, please see the code for more details, this might change in the future

Warning

This has not been extensively tested for now, although we are confident that this is working correctly (and z-addresses derivation rules might change as explained above, so please backup too the code used when you generate your wallet)

Before using it you might consider reading Bug 1893

Use - Generate wallets

Output is stored in wallet.txt, all details for the keys are stored in log.txt (recommended to backup somewhere)

create_wallet(new Buffer('4ecf2e71d567072fe2f9cda40873afcaae4224e3f249018621a90dd43e88f8de','hex'),null,null,'zcash');

or with the secret option allowing not to store the master seed

create_wallet(new Buffer('4ecf2e71d567072fe2f9cda40873afcaae4224e3f249018621a90dd43e88f8de','hex'),true,null,'zcash');

or to generate more than 100 addresses:

create_wallet(new Buffer('4ecf2e71d567072fe2f9cda40873afcaae4224e3f249018621a90dd43e88f8de','hex'),null,1000,'zcash');

Output example in wallet.txt for z-addresses (last z-address generated in wallet.txt):

------------------------------------ depth 3 index hardened 99
chain code: 5fe26266ced419847229c67c52cdcb27e7d0e30e19f93db29e43f85d90b11656
private key: 068bf5f79b8ffe10891474f24c32a5888c6ed1bb59750a0a4fa99421dd1b0cdf
public key: 0456b4bcc66c2d63134c85c39866b0275dfa55463ecbc50d2406038af54826a723a28d8b4ee8ede58115f13db1bd8ffc122a25f927991c2d41983e9f69cafb3d79
public key (compact): 0356b4bcc66c2d63134c85c39866b0275dfa55463ecbc50d2406038af54826a723
Extended private key: 33msrix1PjeQgRC1R53uFEpDYyykjijZizSUc3Bi6d1XvUjTzUksrXHw7Qh218ffCHmpDoSG6Pehh1BSSFMt6DXg1wjwUG6ghmTmHet727BRjFEAamA
Extended public key: 33msrizgKxdm5viuFScCTitgf1Wm6rgJH2Gy1VuZTqw8is95YpHrjKd5ex1GYvz93bMdQEBy4t2ZAC5L6sP1Ci5gNkFpYhPBvQ3bnScC7fADVzrWMWH
address: t1e44ZQHzUB6Q4MYLRvQdzGu9NbexPuMvwd

You don't really care of the above, the important part is:

------------------------------------ depth 3 index hardened 99
spending key: 0fbab70eb70f8d5a99e32621c990edc960852b84cf41a4efeee4ef08538ca4fa
paying key: 67b6baa929cd8793d0c49afb9ac9efc851ad915f502f801f9c6e281a0c9c6cae
transmission key: 63b706663a1dbd57d1efc1e00b40e8c2226b2c42d4dd4369f214e688df1fa2fe
spending key address: SKxutugkTFsubPcuWfq12DUU2vDDiUhg8LP834FPiFwYvPTuYF9W
z-address: zcX3d1ppxo71Xrvk4p5JtvFCxob2uYFuVfJ2gphSzb2taZpqrTrSZYXXW7a8By4aa4coC9Lh5aQF48gW9X8gqZbsRDwwm79

Check that this is a valid z-address and that the keys are correct:

zcash-cli z_validateaddress zcX3d1ppxo71Xrvk4p5JtvFCxob2uYFuVfJ2gphSzb2taZpqrTrSZYXXW7a8By4aa4coC9Lh5aQF48gW9X8gqZbsRDwwm79
{
	"isvalid" : true,
	"address" : "zcX3d1ppxo71Xrvk4p5JtvFCxob2uYFuVfJ2gphSzb2taZpqrTrSZYXXW7a8By4aa4coC9Lh5aQF48gW9X8gqZbsRDwwm79",
	"payingkey" : "67b6baa929cd8793d0c49afb9ac9efc851ad915f502f801f9c6e281a0c9c6cae",
	"transmissionkey" : "63b706663a1dbd57d1efc1e00b40e8c2226b2c42d4dd4369f214e688df1fa2fe",
	"ismine" : false
}

Check that zcash-cli generates the same keys:

 zcash-cli z_importkey SKxutugkTFsubPcuWfq12DUU2vDDiUhg8LP834FPiFwYvPTuYF9W false
 zcash-cli z_exportwallet path/wallet.txt

Check in wallet.txt:

 SKxutugkTFsubPcuWfq12DUU2vDDiUhg8LP834FPiFwYvPTuYF9W 1970-01-01T00:00:00Z # zaddr=zcX3d1ppxo71Xrvk4p5JtvFCxob2uYFuVfJ2gphSzb2taZpqrTrSZYXXW7a8By4aa4coC9Lh5aQF48gW9X8gqZbsRDwwm79

Import your wallet: see z_importwallet in Zcash payment API

Note: z-addresses are commented in wallet.txt, uncomment those that you want to use