How to relinquish control of a node's main account to an external account, so that the external account's private key is never required in the node setup process.
This is useful, for example, for service providers (also known as staking service providers or hosting service providers) that work in a non-custodial manner. This is, customers hire the service provider to setup nodes for them and have any node rewards sent to their main accounts, without ever sending their account keys to the service provider.
This guide is intended for the service provider setting up a node on behalf of their customer.
There are many mechanisms to achieve this in Symbol. This page explains the simplest one, assuming that the customer is not tech-savvy (and therefore prefers not to use command-line tools like symbol-cli), and that the customer's key are not allowed on an online machine.
注釈
顧客のキーをオンラインにできる場合は、さらに簡単なプロセスになります。
このシナリオを説明するガイドが、まもなくこのページに追加されます。
In summary, once the node is completely setup, full control of the node's main account will be transferred to the customer account (called external account) by turning main into a マルチシグアカウント:
サービスプロバイダーはオフライン署名用のトランザクションを準備し、それを顧客に送信します。
顧客はオフラインマシンからウォレットを使用してトランザクションに署名し、署名を返却します。
サービスプロバイダはこのトランザクションをアナウンスします。
ノード マシン上:
the セキュアなノードの立ち上げ ガイドに従った 起動している Symbol ノード があること。
設定 マシン上:
symbol-cli がインストール済み セキュアなノードの立ち上げ ガイドでインストール済みです。
ノードのメインアカウントとして symbol-cli プロファイルがあること これもガイドで完了済みです。
Make sure the correct profile is the default one (use symbol-cli profile setdefault or add the --profile parameter to all commands below).
顧客 マシン上:
Have the Symbol Desktop Wallet installed and configured with the customer's account (external account).
So far, the node's main account is a regular account. A MultisigAccountModificationTransaction will be announced that will turn it into a マルチシグアカウント with a single cosignatory: the external account.
This means that any operation on the main account will require the signature of the external account.
This transaction will be prepared by the service provider using symbol-cli and sent to the customer for signing.
このトランザクションについて:
The --max-fee 1000000 parameter means that 1 XYM will be paid for the transaction. Feel free to use a different number after reading the fees documentation.
The default transaction deadline in symbol-cli is 2 hours. Use the --deadline parameter if you need more time to get the customer's signature.
Run this from the configuration machine:
symbol-cli transaction multisigmodification --max-fee 1000000 \
--mode normal --min-removal-delta 1 --min-approval-delta 1 \
--action Add --aggregate-type AGGREGATE_COMPLETE \
--cosignatory-addresses ●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●
外部アカウントアドレス を連署者として使用し、トランザクションは アナウンスしない でください。
✔ Enter your wallet password: … *********
┌─────────────────────────────────────────────────────────────────────────────────────────────────────────────────┐
│ AGGREGATE_COMPLETE │
├──────────────────────────────────────────────┬──────────────────────────────────────────────────────────────────┤
│ Max fee: │ 1,000,000 │
├──────────────────────────────────────────────┼──────────────────────────────────────────────────────────────────┤
│ Network type: │ TEST_NET │
├──────────────────────────────────────────────┼──────────────────────────────────────────────────────────────────┤
│ Deadline: │ 2021-03-27 14:51:01.099 │
├──────────────────────────────────────────────┴──────────────────────────────────────────────────────────────────┤
│ Inner transaction 1 of 1 - MULTISIG_ACCOUNT_MODIFICATION │
├──────────────────────────────────────────────┬──────────────────────────────────────────────────────────────────┤
│ [Inner tx. 1 of 1] Min approval delta: │ 1 │
├──────────────────────────────────────────────┼──────────────────────────────────────────────────────────────────┤
│ [Inner tx. 1 of 1] Min removal delta: │ 1 │
├──────────────────────────────────────────────┼──────────────────────────────────────────────────────────────────┤
│ [Inner tx. 1 of 1] Address addition (1 / 1): │ TAJ3DW-DCRWBU-V6CXBQ-TNAAKH-UPRPQ6-I2QW7V-7JA │
├──────────────────────────────────────────────┴──────────────────────────────────────────────────────────────────┤
│ Signature details │
├──────────────────────────────────────────────┬──────────────────────────────────────────────────────────────────┤
│ Payload: │ F800000000000000FAE63B1603A8FA30BF5F8A7E5C7906349AAA89591BD20651 │
│ │ 013704F4E03894206D6543339716A8E4391E53873F8F43BEC10D9706F74764C7 │
│ │ 940C07A756F4950ACC6D13D64FB9BF69B72846C3FE99127D48C3293F473D528F │
│ │ B902600CB7DA1033000000000198414140420F0000000000EB39311C0A000000 │
│ │ 5B8F6FEBA2C4D0C7E1C084DA1E828B68C46EE7EE247811BE3DBDCE913E40E027 │
│ │ 50000000000000005000000000000000CC6D13D64FB9BF69B72846C3FE99127D │
│ │ 48C3293F473D528FB902600CB7DA103300000000019855410101010000000000 │
│ │ 9813B1D8628D834AF8570C26D00147A3E2F8791A85BF5FA4 │
├──────────────────────────────────────────────┼──────────────────────────────────────────────────────────────────┤
│ Hash: │ 13241107ACC87B4F7B047C335856326D86AC0F4FF2C0F52CCA1D7FC4E6491CB8 │
├──────────────────────────────────────────────┼──────────────────────────────────────────────────────────────────┤
│ Signer: │ CC6D13D64FB9BF69B72846C3FE99127D48C3293F473D528FB902600CB7DA1033 │
└──────────────────────────────────────────────┴──────────────────────────────────────────────────────────────────┘
✔ Do you want to announce this transaction? … no
Select all the text in the Payload box and paste it into a new text file named payload.txt. Remove all spaces and other decorations to obtain a single line containing only numbers and uppercase letters:
F800000000000000FAE63B1603A8FA30BF5F8A7E5C7906349AAA89591BD20651013704F4E03894206D6543339716A8E4391E53873F8F43BEC10D9706F74764C7940C07A756F4950ACC6D13D64FB9BF69B72846C3FE99127D48C3293F473D528FB902600CB7DA1033000000000198414140420F0000000000EB39311C0A0000005B8F6FEBA2C4D0C7E1C084DA1E828B68C46EE7EE247811BE3DBDCE913E40E02750000000000000005000000000000000CC6D13D64FB9BF69B72846C3FE99127D48C3293F473D528FB902600CB7DA1033000000000198554101010100000000009813B1D8628D834AF8570C26D00147A3E2F8791A85BF5FA4
This payload cannot be announced without a signature from the external account, since it has been added as a cosignatory.
The customer uses their Symbol Desktop Wallet to create a signature for the received payload:
Open the Desktop Wallet and click on Go to offline transactions on the top right corner.
トランザクションに連署 タブを選択。
Paste the full payload into the big box labeled Paste the transaction payload.
Import payload をクリックします。
Select the Profile name and the external account (in the From: box).
ウォレットの パスワード を入力して 確認 をクリックします。
QR コードと長いテキスト行が取得され、次のようになります:
{"parentHash":"13241107ACC87B4F7B047C335856326D86AC0F4FF2C0F52CCA1D7FC4E6491CB8","signature":"1D8FD3A815C45B9FFCCD48FF9DE24FAD172D373E889D25F3005FDAA0F87DB70AB9ABD2ECB79E467577FCE49B760729706247B24479CB32A88A4A1C1974D4220A","signerPublicKey":"7F71566C57A8E5B03EADBA28E4CA057428DDB37C766604B2827BC2D79BB195B8","version":{"lower":0,"higher":0}}
Copy the whole line of text (for example by triple-clicking on it) and paste it into a new text file named signature.txt.
Announce the multisig modification transaction from any online machine that has installed symbol-cli and has an announcer profile (as explained in セキュアなノードの立ち上げ):
symbol-cli transaction payload --sync --announce --profile C
? Enter the transaction payload: F8000000000...
SUCCESS Transaction loaded:
┌──────────────────────────────────────────────────────────────────────────────────────────────┐
│ AGGREGATE_COMPLETE │
├──────────────────────────────────────────────┬───────────────────────────────────────────────┤
│ Max fee: │ 1,000,000 │
├──────────────────────────────────────────────┼───────────────────────────────────────────────┤
│ Network type: │ TEST_NET │
├──────────────────────────────────────────────┼───────────────────────────────────────────────┤
│ Deadline: │ 2021-03-27 14:51:01.099 │
├──────────────────────────────────────────────┼───────────────────────────────────────────────┤
│ Signer: │ TBGPYD-CO35V2-AMOYEJ-LEM44H-372M3I-6RWVFY-QCY │
├──────────────────────────────────────────────┴───────────────────────────────────────────────┤
│ Inner transaction 1 of 1 - MULTISIG_ACCOUNT_MODIFICATION │
├──────────────────────────────────────────────┬───────────────────────────────────────────────┤
│ [Inner tx. 1 of 1] Min approval delta: │ 1 │
├──────────────────────────────────────────────┼───────────────────────────────────────────────┤
│ [Inner tx. 1 of 1] Min removal delta: │ 1 │
├──────────────────────────────────────────────┼───────────────────────────────────────────────┤
│ [Inner tx. 1 of 1] Address addition (1 / 1): │ TAJ3DW-DCRWBU-V6CXBQ-TNAAKH-UPRPQ6-I2QW7V-7JA │
└──────────────────────────────────────────────┴───────────────────────────────────────────────┘
? Cosignature JSON array in square brackets (Enter to skip): [{"parentHash"...
When prompted for the transaction payload, paste the contents of payload.txt (the long line of hexadecimal characters).
When prompted for the cosignature, paste the contents of signature.txt (the long line of JSON text that the customer sent back), BUT ENCLOSE IT IN SQUARE BRACKETS.
つまり、連署者は [ で始まり ] で終わる必要があります。
数秒後、次のようになります:
...
SUCCESS Transaction announced
SUCCESS Transaction confirmed
From this point onwards, no operation can be performed on the node's main account without authorization from the external account, which is controlled by the customer.
The customer can perform operations on the main account using the Symbol Desktop Wallet and its multisig facilities.
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