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No signing, broadcasting, custody, asset-delta/risk scan or execution guarantee.","inputSchema":{"type":"object","properties":{"candidate":{"type":"object","properties":{"chain_id":{"type":"string","const":"8453"},"from":{"type":"string","minLength":42,"maxLength":42},"to":{"type":"string","minLength":42,"maxLength":42},"value":{"type":"string","maxLength":78,"pattern":"^(0|[1-9][0-9]*)$"},"data":{"type":"string","maxLength":131074,"pattern":"^0x(?:[0-9a-fA-F]{2})*$"}},"required":["chain_id","from","to","value","data"],"additionalProperties":false},"constraints":{"type":"object","properties":{"max_execution_cost_wei":{"type":"string","maxLength":78,"pattern":"^(0|[1-9][0-9]*)$"},"allowed_to":{"maxItems":100,"type":"array","items":{"type":"string","minLength":42,"maxLength":42}},"denied_to":{"maxItems":100,"type":"array","items":{"type":"string","minLength":42,"maxLength":42}}},"additionalProperties":false},"fee_estimation":{"description":"Explicit opt-in to a separate versioned network_fee_estimate. 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