lamportsToSol function
Converts lamports
to sol.
Implementation
double lamportsToSol(final BigInt lamports) {
assert(
lamports <= (BigInt.from(double.maxFinite) * lamportsPerSol.toBigInt()),
'The lamports value $lamports overflows the max double value ${double.maxFinite}.');
return lamports / lamportsPerSol.toBigInt();
}