This project reimplements the spacechain proposal in BDK, improving the UX and automating all the steps.
For now, it deliberately keeps the same behavior as the original project.
To run this software, signet Electrs server running on tcp://127.0.0.1:50001 is required.
$ git clone git@github.com:w0xlt/spacechain-v0.git
$ cargo build --release
$ cd target
$ cd release
Then run the software with the following command to get a new address. If a wallet does not exist, this command will create one.
$ spacechains new_address
No wallet found in /home/node/.spacechains/default/keystore. Creating a new wallet ...
Generating new seed.
Wallet mnemonic: legend secret donor sense curtain tunnel aspect mother vacant cycle they harbor
{
"address": "tb1qslstnfhvqxqz339vsmdsuarrezqlks2hcdxzw4",
"index": 0
}
Note that the wallet was created in $HOME/.spacechains. The next folder default is the wallet name. keystore is the file in which the master key is stored.
Proceed to the signet faucet and send 0.01 coins on the address indicated in the terminal.
The wallet balance can be checked with the following command:
$ spacechains balance
{
"confirmed": 1000000,
"immature": 0,
"trusted_pending": 0,
"untrusted_pending": 0
}
Wait until the balance is confirmed and proceed to the next step. This may take a while.
The broadcast command will create and broadcast the covenant and the fee-bumping CPFP transactions.
If broadcasted successfully, the command will return the id of both transactions.
$ spacechains broadcast 100000 "Hello World"
{
"covenant_transaction_id": "0e5dbbb78236116f741399e617048d2ebc7e4c6b3d5038306afea4d776acd2a7",
"cpfp_transaction_id": "1c5ec24460adf9d020d1556d15a571e24546e5ee2693c5c1b6dd12a9472a09c1"
}
The first parameter is the fee amount to be paid. This must be less than the confirmed wallet balance.
The second is the data to be include in the OP_RETURN output of the fee-bumping CPFP transaction.
The backup command shows the private descriptor. With this, the wallet can be exported to Bitcoin Core or others that support descriptors.
$ spacechains backup
{
"blockheight": 116443,
"descriptor": "wpkh(tprv8ZgxMBicQKsPfKxtuhjVE7kk7xj3RAbxY7axSoM6mUZYzfSvk6Ke31wTscSvffsdC3aU1js6ZLPMjwT3SgJ3duM5W8ReWLWs5Ad9UuwbCep/84'/1'/0'/0/*)",
"label": "exported wallet"
}