Pure-JS solver for a BTX MatMul service challenge. Searches nonces starting
from header_context.nonce64_start (or options.nonceStart) until the
transcript-hash satisfies digest_le256 <= target_be256 or maxTries is
exhausted.
Returns null if no solution was found within the budget.
Pure-JS solver for a BTX MatMul service challenge. Searches nonces starting from
header_context.nonce64_start(oroptions.nonceStart) until the transcript-hash satisfiesdigest_le256 <= target_be256ormaxTriesis exhausted.Returns
nullif no solution was found within the budget.