Returns expected price in USDC, cUSD etc. for a given amount of mobile money and vice versa.
/api/pay-widget-merchant/price
POLYGON
, ETHEREUM
, STELLAR
, AVALANCHE
, SOLANA
, ALGORAND
, CELO
, BASE
, TON
, LISK
, ARBITRUM
, OPTIMISM
, BNB
USDC
, USDC_E
, USDT
, CUSD
, CKES
usdc
, local
country ISO code, e.g. NG
bank_transfer
, mobile_money
, mpesa
, carrier