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@ -1,4 +1,3 @@ |
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# Coldcard Hardware Wallet Plugin |
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## Just the glue please |
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@ -14,22 +13,18 @@ this reason, all PIN code entry is done directly on the device. |
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Coldcard does not appear on the USB bus until unlocked with appropriate |
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PIN. Initial setup, and seed generation must be done offline. |
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Coldcard uses an emerging standard for unsigned tranasctions: |
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Coldcard uses the standard for unsigned tranasctions: |
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PSBT = Partially Signed Bitcoin Transaction = BIP174 |
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However, this spec is still under heavy discussion and in flux. At |
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this point, the PSBT files generated will only be compatible with |
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Coldcard. |
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The Coldcard can be used 100% offline: it can generate a skeleton |
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Electrum wallet and save it to MicroSD card. Transport that file |
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to Electrum and it will fetch history, blockchain details and then |
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operate in "unpaired" mode. |
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Spending transactions can be saved to MicroSD using the "Export PSBT" |
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button on the transaction preview dialog (when this plugin is |
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owner of the wallet). That PSBT can be signed on the Coldcard |
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Spending transactions can be saved to MicroSD using by exporting them |
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from transaction preview dialog (when this plugin is |
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owner of the wallet). That PSBT is then signed on the Coldcard |
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(again using MicroSD both ways). The result is a ready-to-transmit |
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bitcoin transaction, which can be transmitted using Tools > Load |
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Transaction > From File in Electrum or really any tool. |
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@ -39,12 +34,8 @@ Transaction > From File in Electrum or really any tool. |
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## TODO Items |
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- No effort yet to support translations or languages other than English, sorry. |
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- Coldcard PSBT format is not likely to be compatible with other devices, because the BIP174 is still in flux. |
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- Segwit support not 100% complete: can pay to them, but cannot setup wallet to receive them. |
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- Limited support for segwit wrapped in P2SH. |
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- Someday we could support multisig hardware wallets based on PSBT where each participant |
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is using different devices/systems for signing, however, that belongs in an independant |
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plugin that is PSBT focused and might not require a Coldcard to be present. |
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- We support multisig hardware wallets based on PSBT where each participant |
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is using different devices/systems for signing. |
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### Ctags |
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@ -52,14 +43,3 @@ Transaction > From File in Electrum or really any tool. |
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ctags -f .tags electrum `find . -name ENV -prune -o -name \*.py` |
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### Working with latest ckcc-protocol |
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- at top level, do this: |
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pip install -e git+ssh://git@github.com/Coldcard/ckcc-protocol.git#egg=ckcc-protocol |
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- but you'll need the https version of that, not ssh like I can. |
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- also a branch name would be good in there |
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- do `pip uninstall ckcc` first |
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- see <https://stackoverflow.com/questions/4830856> |
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Peter D. Gray
4 years ago