The term TPA stands for:
Token purchase agreement
Token purchase agreement is a Contract that specifies the conditions for the purchase of tokens, e.g., ERC-20 based tokens from Ethereum. The contract includes the name of the token, the purchase price, the terms of delivery, conditions to the buyer (e.g., a certain nationality), naming of risks, confidentiality rules or the regulation of exceptional cases (e.g., loss of keys, invalid wallet address). Similar to service level agreements (SLA), a TPA thus provides a legal basis for executing of smart contracts.
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