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Allow an account to be exclusively multisigned (RIPD-182):

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An account can be made signable with only its regular key by
disabling the master key.  Now an account can also be made
exclusively multisigned by both disabling the master key and
having no regular key.

In order to prevent an account from becoming unsignable the
network uses these rules:

 o An account can always add or replace a regular key or a
   SignerList as long as the fee and reserve can be met by the
   account.

 o The master key on an account can be disabled if either a
   regular key or a SignerList (or both) is present on the account.
   Either the regular key or the SignerList can be used to
   re-enable the master key later if that is desired.

 o The regular key on an account may only be removed if either the
   master key is enabled or the account has a SignerList (or both).

 o The SignerList on an account may only be removed if either the
   master key is enabled or a regular key is present (or both).

As a consequence of this change, the tecMASTER_DISABLED error
code is renamed to tecNO_ALTERNATIVE_KEY.  The error code number
(130 decimal) is unchanged.
This commit is contained in:
Scott Schurr
2015-08-06 14:52:27 -07:00
parent 6d2e3da306
commit f1c29ae20b
8 changed files with 162 additions and 70 deletions
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10
src/ripple/app/tx/impl/SetSignerList.h
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@@ -76,12 +76,14 @@ private:
AccountID const& account,
beast::Journal j);
TER replaceSignerList (uint256 const& index);
TER destroySignerList (uint256 const& index);
TER replaceSignerList ();
TER destroySignerList ();
void writeSignersToLedger (SLE::pointer ledgerEntry);
TER removeSignersFromLedger (Keylet const& accountKeylet,
Keylet const& ownerDirKeylet, Keylet const& signerListKeylet);
void writeSignersToSLE (SLE::pointer const& ledgerEntry) const;
static std::size_t ownerCountDelta (std::size_t entryCount);
static int ownerCountDelta (std::size_t entryCount);
};
} // ripple