SandboxLayer constructor
Creates a sandbox layer, seeding demo balances when mockBalances
is not provided.
Implementation
SandboxLayer({
Map<String, double>? mockBalances,
this.maxTransactionAmount = 10000,
}) : mockBalances = mockBalances ??
{
// Seed data for demo/testing purposes only.
'user_1': 500.0,
'user_2': 5000.0,
};