[revealer]

A bond default is defined as per bond purchasing contract. Cannot anyhow interprete or blame other party for causing the default.  Legally there r clause on grace period to handle all the unforeseen circumstances.  Usually,  the bond issuer will not want to default under any circumstances as no one will want to buy their bonds again.

Yes. There must be a contract. One cannot suka suka said Russia has defaulted and Russia cannot blame the default is caused by other parties unless it has been clearly defined in the contract. There is no point arguing without referring to the written contract.