if you haven't yet, check out nostr:nprofile1qqs9pk20ctv9srrg9vr354p03v0rrgsqkpggh2u45va77zz4mu5p6ccpzemhxue69uhhyetvv9ujuvrcvd5xzapwvdhk6qgdwaehxw309aukzcn49ekk2qghwaehxw309aex2mrp0yh8x6tpd4ehgu3wvdhk60v82wz, creator of the cashu implementation of ecash which is one of two built integrated with Bitcoin. The second implementation is fedimint; a federated ecash mints protocol
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He was one of the first ppl I followed lol. I had no idea though 😠thanks